Residual Oils (Petroleum), Solvent-Refined
- Mineral oils
- CAS 64742-01-4
- IUPAC: Residual oils (petroleum), solvent-refined
Residual Oils (Petroleum), Solvent-Refined (CAS 64742-01-4) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026), 1 of which carry a DANGER signal word on their published Safety Data Sheet. It is listed on California's Proposition 65.
California Prop 65 cancer-listed petroleum fraction (residual oils, solvent-refined class). IARC Group 1 carcinogen (cancer) at the fraction level — primarily an occupational concern from repeated prolonged skin exposure. In paste anti-seize used for occasional fastener service, acute exposure risk is low; the Prop 65 listing triggers consumer disclosure requirements.
Residual oils (petroleum), solvent-refined (CAS 64742-01-4) are a class of heavy petroleum base oils produced by solvent refining of petroleum residua. They serve as the heavy carrier base in industrial greases, anti-seize compounds, and high-temperature lubricants, providing paste body and lubrication before the carrier volatilizes during service.
This fraction is classified by IARC as a Group 1 carcinogen based on evidence of skin cancer in industrial workers who experienced repeated, prolonged dermal exposure to untreated or mildly treated mineral oils over decades. Solvent-refined residual oils are lower-risk than untreated oils but retain the Prop 65 cancer listing in California.
In paste anti-seize applications (occasional fastener service), the acute exposure pathway is limited skin contact. The Prop 65 disclosure is a regulatory requirement reflecting the fraction's classification, not an indication of acute hazard under typical home-mechanic use.
Health & environment profile
- VOC
- no
- Prop 65 listed
- yes
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- no
- Bioaccumulative
- no
- Persistent
- yes
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 4/5
Common questions about Residual Oils (Petroleum), Solvent-Refined
- What is Residual Oils (Petroleum), Solvent-Refined used for in car care?
- Heavy petroleum carrier base oil in high-temperature greases and anti-seize compounds; provides film-forming lubrication for paste consistency
- Is Residual Oils (Petroleum), Solvent-Refined a VOC?
- No. Residual Oils (Petroleum), Solvent-Refined is not classified as a volatile organic compound (VOC).
- Is Residual Oils (Petroleum), Solvent-Refined on California's Proposition 65 list?
- Yes. Residual Oils (Petroleum), Solvent-Refined appears on California's Proposition 65 list.
1 product contain this
Loctite LB 8023 Marine Grade Anti-SeizeProp 65anti-seize
Related
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.