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Hydrotreated Heavy Petroleum Distillates

  • Mineral oils
  • CAS 64742-54-7
  • IUPAC: Distillates (petroleum), hydrotreated heavy

Hydrotreated Heavy Petroleum Distillates (CAS 64742-54-7) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).

Classified as Carcinogen Category 1 (H350 — may cause cancer) in GHS-based SDS frameworks, primarily driven by polycyclic aromatic hydrocarbon (PAH) content even after hydrotreating. This is a genuine cat-1 carcinogen classification that persists at trace levels in formulas where it appears as a minor processing residue. No skin sensitizer (H317) or skin corrosion (H314) at mixture level in typical consumer products.

Hydrotreated heavy petroleum distillates (CAS 64742-54-7) is a complex petroleum fraction used as a carrier or processing residue in some surface-cleaning and restoration formulas. Despite the hydrotreating process designed to reduce PAH content, EU and GHS regulatory frameworks classify it as a Carcinogen Category 1B (H350) based on animal study evidence of carcinogenicity.

At trace concentrations (<1%) in headlight restoration wipes (where it appears in the Step 1 cleaning formula), the substance drives the H350 carcinogen Cat 1 classification at the mixture level in the SDS, reducing formula transparency scores. It is distinct from the lighter hydrotreated petroleum fractions (CAS 64742-47-8, -47-8, etc.) used in tire dressings — this heavy fraction has a higher boiling range and lower volatility.

Not listed under California Prop 65 separately (distinct from heavier naphthenic distillates). Persistent in the environment but low exposure risk at trace concentrations in consumer products.

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
4/5
Purpose: Trace carrier solvent in cleaning and restoration products; drives carcinogen Cat 1 (H350) classification at trace concentrations (<1%) in some formulations

Common questions about Hydrotreated Heavy Petroleum Distillates

What is Hydrotreated Heavy Petroleum Distillates used for in car care?
Trace carrier solvent in cleaning and restoration products; drives carcinogen Cat 1 (H350) classification at trace concentrations (<1%) in some formulations
Is Hydrotreated Heavy Petroleum Distillates a VOC?
No. Hydrotreated Heavy Petroleum Distillates is not classified as a volatile organic compound (VOC).
Is Hydrotreated Heavy Petroleum Distillates on California's Proposition 65 list?
No. Hydrotreated Heavy Petroleum Distillates is not on California's Proposition 65 list.

1 product contain this

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.