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Naphtha (Petroleum), Heavy Alkylate

  • Aliphatic solvents
  • CAS 64741-65-7
  • IUPAC: Naphtha (petroleum), heavy alkylate

Naphtha (Petroleum), Heavy Alkylate (CAS 64741-65-7) appears in 3 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.

H304 (aspiration hazard), H331 (toxic if inhaled at high concentrations), H340 (suspected genetic defects, Cat 1B at ingredient level), H350 (suspected carcinogen, Cat 1B at ingredient level). The carcinogen and mutagen classifications at mixture level are driven in part by this ingredient's contribution.

Naphtha (Petroleum), Heavy Alkylate (CAS 64741-65-7) is a high-boiling petroleum naphtha fraction produced via catalytic alkylation. It is used as a carrier solvent in polishes, waxes, and protective coatings — providing the solvency needed to deposit polymer films on surfaces. The ingredient carries H304 (aspiration hazard if swallowed), H331 (acute inhalation toxicity at high concentrations), H340 (suspected germ cell mutagen Cat 1B), and H350 (suspected carcinogen Cat 1B) classifications. These Cat 1B classifications reflect long-chain PAH residues that may persist in heavily petroleum-derived fractions despite alkylation processing.

Health & environment profile

VOC
yes
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
no
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
2/5
Purpose: Heavy alkylate petroleum cut used as a carrier solvent in polishes and coatings; provides solvency for depositing polymeric protective layers

Common questions about Naphtha (Petroleum), Heavy Alkylate

What is Naphtha (Petroleum), Heavy Alkylate used for in car care?
Heavy alkylate petroleum cut used as a carrier solvent in polishes and coatings; provides solvency for depositing polymeric protective layers
Is Naphtha (Petroleum), Heavy Alkylate a VOC?
Yes. Naphtha (Petroleum), Heavy Alkylate is classified as a volatile organic compound (VOC).
Is Naphtha (Petroleum), Heavy Alkylate on California's Proposition 65 list?
No. Naphtha (Petroleum), Heavy Alkylate is not on California's Proposition 65 list.

3 products 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.