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Naphtha (Petroleum), Hydrotreated Heavy

  • Aliphatic solvents
  • CAS 64742-48-9
  • IUPAC: Naphtha (petroleum), hydrotreated heavy

Naphtha (Petroleum), Hydrotreated Heavy (CAS 64742-48-9) appears in 9 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.

H304 aspiration hazard at Cat 1 when present as mixture component; H315 skin irritant; not classified as carcinogen or reproductive toxin.

Hydrotreated heavy naphtha is a complex combination of hydrocarbons in the C6–C13 carbon number range produced by catalytic hydrotreatment of petroleum fractions. In car care products it functions as a carrier solvent that helps polymer actives spread evenly across a surface and then volatilize, leaving the protective film behind.

At the finished-product concentration range typical in sealants (12–20%), the mixture-level GHS classification captures the aspiration toxicity (H304) — relevant if the product is swallowed and enters the airway, not from vapor during normal application. It is a VOC contributor; VOC contribution should be estimated from concentration in the formula.

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: Aliphatic petroleum distillate carrier solvent — provides solvency for polymer deposition in sealants and coatings

Common questions about Naphtha (Petroleum), Hydrotreated Heavy

What is Naphtha (Petroleum), Hydrotreated Heavy used for in car care?
Aliphatic petroleum distillate carrier solvent — provides solvency for polymer deposition in sealants and coatings
Is Naphtha (Petroleum), Hydrotreated Heavy a VOC?
Yes. Naphtha (Petroleum), Hydrotreated Heavy is classified as a volatile organic compound (VOC).
Is Naphtha (Petroleum), Hydrotreated Heavy on California's Proposition 65 list?
No. Naphtha (Petroleum), Hydrotreated Heavy is not on California's Proposition 65 list.

9 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.