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Solvent Naphtha (Petroleum), Heavy Aliphatic

  • Aliphatic solvents
  • CAS 64742-96-7
  • IUPAC: Hydrocarbons, C9-12, n-alkanes, isoalkanes, cyclics, <2% aromatics

Solvent Naphtha (Petroleum), Heavy Aliphatic (CAS 64742-96-7) appears in 3 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.

Classified H304 (Aspiration Hazard Cat 1) at ingredient level in polysilazane coating SDSs — relevant to ingestion pathway, not vapor inhalation during normal application. Central nervous system effects from prolonged inhalation of high concentrations (occupational exposure); flash point typically above room temperature for heavy fractions.

Solvent naphtha (petroleum), heavy aliphatic (CAS 64742-96-7) is a complex mixture of C9–C12 aliphatic hydrocarbons produced by petroleum refining. In polysilazane ceramic coatings it acts as the primary carrier solvent: the active silane/siloxane polymers are dissolved in this naphtha, applied to the vehicle surface, and the solvent evaporates during the cure phase leaving the cured silica-network film.

The heavy aliphatic grade has a higher flash point than light naphtha fractions and lower evaporation rate, which is one reason polysilazane coatings offer a more forgiving flash window than high-IPA alkoxysilane formulas. H304 (aspiration hazard Cat 1) is the primary GHS classification concern at ingredient level — relevant only if the product is swallowed. This hazard classification does not imply a significant vapor-inhalation risk during normal wipe-on application at room temperature.

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
3/5
Purpose: Heavy aliphatic petroleum naphtha carrier solvent — provides solvency and film deposition for silane/siloxane actives in polysilazane coatings; evaporates during cure leaving the crosslinked film

Common questions about Solvent Naphtha (Petroleum), Heavy Aliphatic

What is Solvent Naphtha (Petroleum), Heavy Aliphatic used for in car care?
Heavy aliphatic petroleum naphtha carrier solvent — provides solvency and film deposition for silane/siloxane actives in polysilazane coatings; evaporates during cure leaving the crosslinked film
Is Solvent Naphtha (Petroleum), Heavy Aliphatic a VOC?
Yes. Solvent Naphtha (Petroleum), Heavy Aliphatic is classified as a volatile organic compound (VOC).
Is Solvent Naphtha (Petroleum), Heavy Aliphatic on California's Proposition 65 list?
No. Solvent Naphtha (Petroleum), Heavy Aliphatic 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.