Distillates, Petroleum, Solvent-Refined Heavy Naphthenic
- Mineral oils
- CAS 64741-96-4
Distillates, Petroleum, Solvent-Refined Heavy Naphthenic (CAS 64741-96-4) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).
Classified as carcinogen Cat 1B (H350) under US OSHA HCS based on the IARC Group 1 classification for the full refined petroleum-oil fraction under occupational inhalation conditions. This is the standard SDS convention for refined naphthenic petroleum distillates and does not reflect typical consumer skin-contact exposure. Not a skin sensitizer or respiratory sensitizer at mixture-level concentrations in paste or grease formulations.
Distillates, Petroleum, Solvent-Refined Heavy Naphthenic (CAS 64741-96-4) is a heavy naphthenic mineral oil fraction used as the carrier and grease base in anti-seize compounds and high-temperature lubricants. The naphthenic processing route produces a fraction with higher cycloalkane content than paraffinic grades, giving good solvency for metal flakes and additive packages.
Under US OSHA HCS, refined mineral oils of this class are classified as carcinogen Cat 1B (H350) based on IARC's Group 1 classification for petroleum oils generally, derived from occupational epidemiology of workers with prolonged inhalation exposure to oil mist in industrial settings. This classification appears on SDS §2 mixture entries for many anti-seize and high-temperature lubricant products that use this base oil. The realistic exposure scenario for a home mechanic applying paste to a few fasteners (skin contact with a few grams) is not the pathway that generated the occupational carcinogen classification.
Not readily biodegradable. Like all heavy petroleum fractions, this base oil should be disposed of with standard automotive fluid waste; avoid drainage to waterways.
Health & environment profile
- VOC
- no
- Prop 65 listed
- no
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- no
- Bioaccumulative
- no
- Persistent
- yes
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 2/5
Common questions about Distillates, Petroleum, Solvent-Refined Heavy Naphthenic
- What is Distillates, Petroleum, Solvent-Refined Heavy Naphthenic used for in car care?
- Carrier oil and grease base in anti-seize compounds and high-temperature lubricants
- Is Distillates, Petroleum, Solvent-Refined Heavy Naphthenic a VOC?
- No. Distillates, Petroleum, Solvent-Refined Heavy Naphthenic is not classified as a volatile organic compound (VOC).
- Is Distillates, Petroleum, Solvent-Refined Heavy Naphthenic on California's Proposition 65 list?
- No. Distillates, Petroleum, Solvent-Refined Heavy Naphthenic is not on California's Proposition 65 list.
1 product contain this
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Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.