Long before calcium naphthenate worried equipment operators, oil field crews noticed stubborn deposits clogging pipes and valves. These waxy, brownish solids seemed to show up wherever petroleum processing touched even a hint of complexity. Early oil producers, staring down unexpected shutdowns, learned the hard way that certain crude oils throw off naphthenic acids. Once refinery operations embraced distillation on a bigger scale, these natural acids found partners in dissolved calcium from water or corrosion products, and the two locked together, fusing into a scale that resisted standard cleaning techniques. By the early 20th century, researchers started putting names to the mess. Historic patent filings and oilfield studies mark the 1920s as the decade when calcium naphthenate finally earned its classification and a measure of respect. Over the next half-century, this compound emerged in research on flow assurance, corrosion, and even cross-disciplinary chemistry. Today, with oilfields growing in both age and breadth, calcium naphthenate remains as much a modern nemesis as a historical curiosity.
Calcium naphthenate forms when naphthenic acids in crude oil marry up with calcium cations, leading to a sticky, water-insoluble solid. While it rarely arrives at a lab in pure form, industrial users sometimes order calcium naphthenate solutions to neutralize acidity, balance lubricants, or improve rust-resistance. On the darker side of the energy business, equipment operators fear its stubborn scales in pipelines and separators. Commercial specimens often look brown and oily, sometimes granular, and may show up mixed with hydrocarbon solvents. Its presence complicates not just oil flow, but also refinery profitability, product purity, and environmental control. Despite its negative connotations, a few specialty industries, such as metalworking or catalyst production, have eyed calcium naphthenate—sometimes called calcium cyclopentancarboxylate—as a raw material for further processing.
In the real world, calcium naphthenate rarely comes as a pristine chemical but usually arrives as a blend of calcium salts of cycloalkyl carboxylic acids. Appearance depends on precursor acids; laboratory preparations often yield a sticky, tan or brown solid that feels waxy. It barely dissolves in water, which makes removing it from pipelines a challenge, but dissolves right away in non-polar solvents. Most samples give off a faintly sour, resinous odor, a reminder of their oilfield roots. Melting points show a wide range, as the raw materials in oilfields differ widely. Chemically, the calcium cation complexes with two carboxylate groups, forming a robust ion-pair. These bonds hold tough under typical refinery temperatures while fracturing apart only when aggressive cleaners or high-strength acids hit the mix. Detailed analysis using FTIR and X-ray diffraction paints a picture of a semi-crystalline structure, often riddled with impurities and secondary organic phases.
Purchase contracts and shipping manifests mark calcium naphthenate as either its technical mixture or, less commonly, by a CAS registry number (e.g., CAS 61789-36-4). Vendors supply it in drums or steel containers, often as an oily paste or semi-solid block, with concentration values expressed in percentage of metal content or naphthenic base. Labels must comply with GHS or local chemical hazard regulations, highlighting corrosive tendency and possible aquatic toxicity. The technical datasheets spell out total acid number (TAN), water content, color, solubility, and typical pH values in model solvents. The few specialty producers that handle purified calcium naphthenate must also monitor for trace metal contamination and hydrocarbon chain distribution, as these influence final performance in engineered applications.
Most industrial-grade calcium naphthenate arises from a fairly direct reaction. Mix a naphthenic acid-rich fraction—usually sourced from vacuum distillation bottoms or a hydrotreated oil cut—with calcium hydroxide in a stirred vessel. Heat the slurry to promote reaction; the product starts to separate as a tough solid or oily mass. Filtering and washing follow. Some processes swap in calcium chloride or even calcium carbonate as the cation source, though this often adds steps or unwanted byproducts. The crude product typically displays wide variability, as it reflects the feedstock—hence great trouble arises in oilfields where exact naphthenic acid compositions shift from well to well. Scale formed in situ in pipelines follows a similar story, driven by local chemistry rather than laboratory control. Modern research teams run batch reactors or continuous stirred vessels for better reproducibility, but field realities still introduce complex mix-ups.
Subject calcium naphthenate to high acidity, and it yields back its parent naphthenic acid and a soluble calcium salt. Alkali treatment can modify its properties, making it easier to dissolve or strip from metal surfaces. In the presence of oxidizers or at elevated temperatures, calcium naphthenate may break down, releasing carbon dioxide and lower molecular-weight acids. It doesn’t survive direct exposure to chelating agents like EDTA, which snatch up calcium and release complexed organics. Petroleum chemists seeking to limit calcium naphthenate fouling often turn toward surface-active agents or convert it to more manageable emulsifiable forms. In rare cases, engineers tweak the structure with additives, grafting surfactant tails or incorporating functionalized carboxylates to change its deposition patterns or solubility in process streams.
Catalogs list this substance under several names: calcium salts of naphthenic acids, calcium cyclopentancarboxylate, and the simple “calcium naphthenate.” In some regions, suppliers use trade designations linked to base oil or acid blends, such as “NAP-Ca 1200” or “Cal-Salt NA.” Industry codes may show up in refinery logbooks, but confusion sometimes arises when field crews encounter “naphthenates” generically—so context remains essential. Safety documentation almost always spells out the calcium linkage and hydrocarbon origin, while regulatory filings give priority to CAS numbers or REACH designations conforming to chemical inventory protocols.
Anyone handling calcium naphthenate gets wise pretty quickly: skin exposure brings irritation, especially for longer shifts, and inhaling its dust in drying operations or cleanup work can provoke respiratory discomfort. The compound’s aquatic hazard figures into safety sheets, and refinery managers train workers to avoid dumping process waters blindly. Clean-up standards emphasize gloves, goggles, and ventilation, with water and detergent washes for spills. State and national guidelines dictate storage practices: drums need tight seals, away from acid-reactive agents or direct heat sources. Disposal becomes a regulated affair, since spent process streams often count as industrial waste requiring treatment or special landfill registration. Operationally, teams keep an eye on scale buildup, using routine pigging, solvent flushes, or scale inhibitors in upstream systems to keep lines open. This doesn’t eliminate the hazard, but steady prevention makes a world of difference in worker safety and plant longevity.
Trouble in pipelines aside, not every use of calcium naphthenate lands on a “problem” list. Metalworking shops found that certain calcium naphthenate solutions dampen corrosion and lubricate die faces. Some lubricating oils in the automotive and heavy equipment trades blend it as a stabilizer. Paint and varnish formulators, searching for leveling agents or anti-skinning properties, once mixed it into alkyd systems—especially before zinc and lead alternatives arrived. Chemical manufacturers occasionally use it as an intermediate, leveraging its affinity for metal ions. Despite its problematic image in oil infrastructure, product developers sometimes harness its chemical resilience and metal-organic structure, targeting niche needs like additive packages or interim reagents in specialty processes.
University and industry teams put ongoing effort into understanding and mitigating calcium naphthenate issues. Field-scale monitoring advances—such as online analyzers and molecular spectroscopy—reveal real-time changes in oil chemistry, helping predict and prevent scale formation. Novel dispersants and biodegradable additives, some based on pyridine or oxyalkylene chains, disrupt deposits more effectively than traditional approaches. Research groups develop simulation models that integrate formation water chemistry, naphthenic acid profiles, and real-world flow conditions, so engineers dial in preventative treatment programs. Environmental studies probe the long-term persistence of calcium naphthenate residues in soil and water, suggesting cleanup protocols and regulatory tweaks. On the processing front, efforts lean toward selective extraction or conversion of naphthenic acids upstream, aiming to pull troublesome reactants out before they lock with calcium.
Health researchers chart the risks of calcium naphthenate to workers and the broader ecosystem. Toxicological profiles highlight skin and eye irritation, with some studies pointing to possible respiratory effects during high exposure. Animal models offer mixed news, with acute doses leading to mild-to-moderate toxicity—yet chronic, low-level exposure questions remain less understood. Environmental investigations show that discharged calcium naphthenate harms aquatic invertebrates and fish, largely tied to its persistence and low water solubility. In water treatment terms, the compound resists breakdown by classic methods, so advanced oxidation or specialized bioreactors become necessary for full removal. Agencies such as the US EPA and European ECHA review evolving data, adjusting safety thresholds and mandatory reporting. So far, few major occupational health incidents have surfaced, but that owes much to diligent workplace standards and evolving process controls.
Calcium naphthenate problems won’t fade as energy producers keep pushing into complex crude streams and older fields. On one hand, the headache of pipeline fouling spurs investment in predictive chemistry, smarter inhibition programs, and better downstream processing. Wider adoption of green chemistry, biodegradable additives, or in situ remediation may ease the environmental load. Chemical manufacturers—watching regulatory landscapes tighten—look for ways to recover or convert calcium naphthenate residues, converting waste into technical products or recovering valuable ingredients. Over time, deeper understanding of acid-base chemistry in petroleum systems could reshape equipment designs and refinery layouts, shifting the economics of scale management. Public health researchers continue probing long-term effects, aiming for clearer toxicology profiles and safer work environments. With global oil demand evolving and sustainability goals advancing, those of us working on or around calcium naphthenate know progress rarely moves in a straight line—but pushing for chemical transparency, safety upgrades, and smarter materials always finds value.
Every time crude oil flows from deep underground reservoirs, companies wrestle with deposits forming in the pipes and production equipment. Most people never see this battle. In offshore drilling, calcium naphthenate is a name that often sparks frustration among engineers and operators. Over my years in the oil and gas industry, I have seen entire teams pause routine production just to deal with these stubborn deposits.
Crude oil carries all sorts of impurities, not just hydrocarbons. It picks up organic acids called naphthenic acids. In fields with a lot of “produced water,” you also get dissolved calcium. Mix these two, and you can produce a sticky sludge—calcium naphthenate. This muck clogs everything from pipelines to production separators. Sometimes, it forms floating mats in oil tanks or reduces the efficiency of water separation. Engineers often find themselves scrambling to clear out wellheads or underwater valves, since build-up can halt production or trigger environmental risks.
Every blockage means lost product and expensive shutdowns. Operators sometimes send remote-controlled submarines underwater just to investigate and remove the stuff. If just a thin layer accumulates on a separator vessel’s walls or inside a pipe, flow rates can drop, leading to millions in lost revenue every year. Clearing out a single well can cost tens of thousands of dollars, not including time spent on downtime. On top of that, discarded sludge often contains enough oil to raise alarms about waste and environmental treatment. Regulations demand careful separation and disposal, making even the waste stream from calcium naphthenate removal a headache.
Companies have developed chemical tools to break down or prevent calcium naphthenate formation. Demulsifiers and scale inhibitors are common solutions; they help keep naphthenic acids and calcium apart, lowering the chance of deposits. I’ve worked on teams that spent months searching for a mix of chemicals that would work with each oilfield’s unique chemistry. There isn’t a universal fix. Water salinity, temperature, and the acid profile all change the way these deposits form.
Sometimes the only option is to shut down a section and flush the pipes with solvents. That’s not cheap and risks damaging infrastructure. The push now is toward more targeted chemical treatments and continuous monitoring—real-time sensors that spot a problem before it shuts a line. Norwegian fields, for example, have invested in advanced detection and specialty chemicals with better environmental profiles. This shift reflects growing pressure from both regulators and local communities to protect marine life and reduce pollution risks.
The industry still has ground to cover. As oil companies move into deeper waters and tackle more complex reservoirs, the role of calcium naphthenate only grows. Research groups keep digging into the chemistry, hoping to develop new additives that break up deposits at the molecular level. Others are searching for “green” inhibitors that keep oil flowing without harming ecosystems. It’s a constant tug-of-war between efficiency and safety, profit and stewardship.
The fight against calcium naphthenate might be hidden from public view, but its impact shows up in oil prices, jobs, and the environmental footprint of production. As technology advances, more energy companies are realizing that tackling this stubborn problem can pay dividends—not only in cleaner pipes but in cleaner seas and better relationships with the communities that rely on them.
Calcium naphthenate forms in crude oil systems, mostly in pipelines and refineries. Workers encounter it as a stubborn deposit, but it poses real risks. Even before any cleaning starts, its presence can already mean trouble—not just for equipment, but for people as well. Years working around oilfields, you start to respect substances that look harmless yet have a reputation for causing skin irritation, eye problems, or respiratory issues.
The right gear always makes a difference. Gloves made from nitrile or neoprene cut the chance of skin contact. Goggles protect the eyes—splashes or dust must never touch unprotected skin. A face shield helps for extra safety, especially during handling or cleaning. Standard work boots and full-length coveralls keep the rest of your body safe from unexpected spills or spray.
Inhaling fumes or dust isn’t worth the risk either. Without a decent mask or respirator, even a short stint in a dusty pipe or tank can become a chemical hazard. Workers rely on half-face or full-face respirators with organic vapor cartridges to keep airways safe. Years ago, no one used masks much, but science has caught up with us and proved how wrong that habit was.
Closed spaces just make things worse. You want fans and ventilation systems working before any cleaning starts. Even during quick maintenance jobs, stagnant air lets fumes build up. Onsite experience shows fresh air cuts the risk—not just for naphthenate but for many chemical hazards.
Small spills still deserve a serious response. Absorbent pads, sand, or industrial kitty litter all work for containment, but speedy cleanup is key. Anything collected gets sealed in hazardous waste containers. No shortcuts, no pouring down the drain, and no tossing in a regular dumpster—those are hard lessons learned under the scrutiny of both safety officers and environmental inspectors.
Proper disposal calls for a licensed facility. Calcium naphthenate doesn’t belong in the regular landfill, and the law treats violations harshly. One oil company faced heavy fines and negative press for waste mismanagement—they now follow strict protocols, tracked from spill to disposal.
Written procedures matter, but workers remember stories and drills more than rules on paper. On my first assignment handling naphthenate, a safety trainer painted the worst-case scenario with enough detail to stick in my mind for years. That’s how habits form—by knowing not just what to do, but why it matters. Chemical burns, long-term health issues, and legal fallout drive home the importance of every step done right.
Accidents always seem rare until they happen close to home. Having working emergency showers and eyewash stations nearby means no wasted seconds. I saw one worker’s quick response turn a bad chemical splash into a minor story instead of a life-changing injury. Testing and maintaining these stations isn’t red tape—it’s practical, everyday risk management.
Hazard communication standards change, and chemicals age or interact with other products in odd ways. Regular safety meetings, refreshed materials, and updates from industry sources keep people sharp. Every worker benefits when the most current safety data sheets and protocols stay available and understandable.
Experienced operators know that saying something before a near miss or accident can mean all the difference. Culture on the job site shifts for the better when workers feel they can question procedures or stop unsafe practices, no matter who’s watching or what deadlines tick by.
Calcium naphthenate makes life tough for oil producers and refiners. It forms stubborn deposits inside pipelines and processing units, sometimes clogging systems and driving up maintenance costs. Away from those headaches, another reality shapes how folks handle this chemical—safe and reliable storage plus careful movement from place to place. Stories from the field tell plenty about the risks and lessons learned.
Nobody in the energy sector stores calcium naphthenate beside basic commodities. This material’s strong reactivity rules out the use of standard tanks and drums. Workers usually see it arriving in carbon steel drums, sometimes with protective liners when folks expect long waits. One veteran I know keeps a careful log every time he checks those drums. He never trusts a container that looks even mildly dented. A single leak spells problems—not just for safety, but for environmental compliance, too.
Facilities that handle it lean into ventilation, short-term holding, and clear labeling. Restricted access isn’t some buzzword on a boardroom slide. Trained staff stay on top of monitoring duties to catch corrosion, pressure buildup, or drips from valve connections long before regulatory reports come due. Shielding and proper grounding cut the risks, especially if operations happen near sources of heat. At the same time, every worker on the floor knows how easy it is to get lazy about personal protective gear. They wear gloves, chemical aprons, goggles, and boots, taking lessons from colleagues who learned the hard way what happens if you ignore safety.
Trucking calcium naphthenate across sites or shipping it via rail and sea invites another level of challenge. Some regions stick with steel drums, but others invest in large intermediate bulk containers (IBCs) sealed tight and secured with ratchet systems. DOT regulations lay out strict paperwork before, during, and after transport, and most dispatchers can tell you about last-minute audits that caught drivers cutting corners. Sometimes, the paperwork slows things to a crawl, but missing a regulation costs far more in the end.
Carriers equipped with spill kits, neutralizers, and containment booms ride along with shipments. One truck operator admitted his early mistakes—he tried shortcuts on secondary containment only to face a small spill at an off-ramp. Now he double-checks seals before signing off pickup sheets. Most bulk trailers come with tamper-proof tags so inspectors along the way can detect unauthorized openings. As the world sharpens its focus on environmental impact, environmentally safe absorbents now sit beside other emergency gear.
Over the last decade, industry pressure and public scrutiny forced a change in both rules and practices. Companies now run regular training, update protocols every year, and keep tighter tabs on storage durations. Refrigerated units sometimes enter the picture in hot regions, especially if plant managers worry about pressure spikes. Personal experience shows these efforts pay off—incidents drop, insurance costs shrink, and workers stay out of harm’s way. Still, high turnover means new hires must quickly learn why shortcuts never pay.
Regulations, from REACH in the European Union to specific EPA rules in the US, push for safer containers and more robust transportation logs. Digital tracking helps head off mistakes but can only do so much without good habits on the ground. I once saw an operator quit on his second week—he realized too late the discipline and awareness these materials demand. Community leaders keep asking for transparency, and it’s easy to see why: any spill, no matter how small, magnifies distrust.
Safer handling of calcium naphthenate builds on practical experience, regulatory wisdom, and the grit of people who never treat it as an everyday cargo. The balance between protection, efficiency, and transparency hasn’t always come easy. Every year brings more stories, more fixes, and—one hopes—fewer regrets.
Oilfield crews often talk about the mess calcium naphthenate leaves behind in production equipment. In offshore oil platforms, this compound shows up as thick, sticky deposits in pipelines and valves. The waxy build-up slows the flow and kicks operating costs up. I’ve heard offshore engineers swap stories about how they spend days scraping out pipes, just to keep crude oil moving. The money spent on cleaning, surfactants, and downtime speaks for itself. That cost climbs fast when companies overlook the source.
The reaction happens when naphthenic acids in crude oil interact with calcium ions found in sea water injected downhole. Sea water flooding pushes oil to the surface, and the byproduct skims off in the flowlines. Operators target these deposits using regular chemical treatments, but few chemical solutions eliminate the substance completely. Removal often needs a combination of heat, solvents, and mechanical cleaning, which means constant attention. No oilfield veteran underestimates how much trouble a stubborn naphthenate plug can cause.
At the refinery, crude oil still brings traces of calcium naphthenate. Workers keep an eye on fouling in heat exchangers and other spots where heavy residues collect. I remember a maintenance manager explaining that his turnaround costs spiked after a run of naphthenic crude. The build-up forced him to pull equipment out of service far too often, cutting into his schedule and margins. He said they spent so much on acid cleaning that he started questioning which crudes to even accept into the facility. The risk of plugging, corrosion, and longer cleanings just didn’t add up against the profits of running heavier, acidic crudes.
In the metalworking world, companies once used calcium naphthenate as a lubricant additive and corrosion inhibitor. Toolmakers liked its protective qualities, but changes in chemical safety regulation have pushed some shops away from it. Safety data sheets now draw close attention. There have been documented cases in which exposure sparked concerns about environmental impact. So people switched to alternatives with a smaller regulatory footprint. Still, in certain grease and lubricant formulations, its legacy continues because of reliability in high-temperature settings.
Industrial cleaners sometimes leaned on calcium naphthenate chemistry, mainly for its mix of solvency and metal protection. I’ve seen older product manuals mentioning its role in break-in fluids for engines, and in specialty wash-down products for processing plants. That said, most newer cleaning solutions have moved in different directions over the last decade, both for performance and to step around disposal rules.
For specialty chemical makers, the compound holds some value in catalysts and surfactants. In paint driers and fuel additives, it’s faded out in favor of options with more predictable environmental records. Regulatory filings from the EPA and reports from the European Chemicals Agency underscore that trend.
Calcium naphthenate’s impact lines up with growing environmental and safety scrutiny. Companies not only face higher maintenance and production costs, but risk pushback from regulators watching water, air, and soil quality. I’ve seen operators perform routine audits just to gauge their exposure. For businesses depending on older tech, the push is on for better chemical alternatives and process tweaks—something scientists and engineers continue to explore. More research focuses on detection, removal, and less risky substitute chemicals to solve these problems before they land on the worksite floor.
Calcium naphthenate usually grabs the spotlight in the oil and gas industry, mostly because of the trouble it stirs up during crude extraction and refining. This compound forms when naphthenic acids in crude oil react with calcium ions, often released from seawater injected during drilling. Left unchecked, it shows up as stubborn deposits that block pipelines and tank walls, costing companies hefty sums in maintenance and downtime.
Looking at the chemistry, calcium naphthenate combines calcium cations with long-chain organic acids. These long, greasy molecules explain the sticky, waxy character it’s known for. The resulting product resists dissolving in water but sticks pretty well to surfaces, making it a nuisance in oily systems.
In terms of appearance, the compound ranges from brown to dark amber. It usually comes as a thick, viscous material or a powder—sometimes even as flaky deposits if left undisturbed in equipment. Its melting point tends to extend above 100°C, giving it resilience in the harsh conditions found in oil fields.
Solubility stands out as a major concern. Calcium naphthenate doesn’t mix well with water, instead it gravitates toward non-polar solvents and oils. This quality makes it hard to flush out once set. Density falls in the ballpark of 1.1 to 1.3 grams per cubic centimeter, heavier than water but still manageable in most industrial processes.
The calcium content, which engineers and operators track closely, usually lands between 8% and 12%. Purity of the naphthenic portion matters, too—high acid numbers signal more reactivity, which points to higher risks of deposit build-up. The sample’s moisture levels can affect behavior, so regular checks happen to prevent flash corrosion or unexpected reactions.
Each naphthenic acid source shapes the compound’s exact molecular distribution. Some fields deliver more branched chains, others linear ones. These subtle differences shift how stubborn the deposits become and influence which chemicals specialists need to clear them out.
Refiners and drillers have learned the hard way that letting calcium naphthenate pile up spells trouble. Blocked tanks and slower oil flow mean real financial headaches. According to studies from the Society of Petroleum Engineers, a single shutdown for cleaning can add up to hundreds of thousands of dollars lost, not even counting equipment damage.
Cleaning up calls for targeted chemical treatments, like ethylenediaminetetraacetic acid (EDTA) or specialized dispersants. Operators monitor pH, temperature, and acid profiles, then tune injection strategies accordingly. Preventing buildup in the first place requires constant vigilance—monitoring water chemistry, choosing compatible production fluids, and jumping on changes early.
Better chemical monitoring has made a real difference in recent years. Sophisticated analysis tools now let technicians flag buildups before they become blockages. Teams also work on blending production water sources to limit calcium exposure or treating with anti-foulants upstream. Ongoing research explores biological removal and more environmentally friendly solvents, aiming for effective removal without adding fresh risks.
Fighting calcium naphthenate means balancing chemistry with boots-on-the-ground experience. Those who keep a close eye on the numbers and remain flexible in their response typically keep equipment cleaner, safer, and running longer.
| Names | |
| Preferred IUPAC name | Calcium bis(oxido(phenyl)methanide) |
| Other names |
Naphthenic acid calcium salt Calcium naphthenate Calcium petroleum naphthenate |
| Pronunciation | /ˈkæl.si.əm næfˈθiː.neɪt/ |
| Identifiers | |
| CAS Number | 1338-24-5 |
| Beilstein Reference | 3198737 |
| ChEBI | CHEBI:88221 |
| ChEMBL | CHEMBL2187075 |
| ChemSpider | 24512 |
| DrugBank | DB14404 |
| ECHA InfoCard | 29b0be26-7765-49e7-8d18-b729d3c3f201 |
| EC Number | 263-049-8 |
| Gmelin Reference | 126439 |
| KEGG | C17698 |
| MeSH | D017769 |
| PubChem CID | 104824 |
| RTECS number | RB0850000 |
| UNII | 62V3X32998 |
| UN number | UN# 3082 |
| Properties | |
| Chemical formula | Ca(RCOO)₂ |
| Molar mass | 388.57 g/mol |
| Appearance | Brownish viscous liquid |
| Odor | Odorless |
| Density | 0.99 g/cm³ |
| Solubility in water | insoluble |
| log P | 0.76 |
| Vapor pressure | Negligible |
| Acidity (pKa) | 10.3 |
| Basicity (pKb) | 10.08 |
| Refractive index (nD) | 1.52 |
| Viscosity | 20-30 cSt |
| Dipole moment | 0.0 D (Debye) |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 489.8 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -986.5 kJ/mol |
| Pharmacology | |
| ATC code | V03AE02 |
| Hazards | |
| GHS labelling | GHS02, GHS07 |
| Pictograms | GHS07, GHS09 |
| Signal word | Danger |
| Hazard statements | H315, H319 |
| Precautionary statements | P261, P273, P280, P305+P351+P338, P337+P313 |
| NFPA 704 (fire diamond) | 2-1-0 |
| Flash point | > 93.3°C (200°F) |
| LD50 (median dose) | LD50 (median dose): >5,000 mg/kg (oral, rat) |
| NIOSH | 'WA2850000' |
| PEL (Permissible) | PEL (Permissible Exposure Limit) for Calcium Naphthenate: 5 mg/m³ |
| REL (Recommended) | 200 mg/kg |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
Magnesium Naphthenate Sodium Naphthenate Potassium Naphthenate Barium Naphthenate Strontium Naphthenate |
