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CarCareTruthProducts · Ranked

Heptane

  • Aliphatic solvents
  • CAS 142-82-5
  • IUPAC: n-Heptane

Heptane (CAS 142-82-5) appears in 18 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.

CNS depressant at high concentrations. Skin degreaser. Flash point 23°C makes it highly flammable. Always use with ventilation and away from ignition sources.

Heptane is a common carrier solvent in ceramic and graphene coatings. It evaporates quickly (flashes off within 1-2 minutes), leaving behind the SiO₂ or graphene active layer. The fast evaporation is why coatings give you such a short working time.

The health risk is real but manageable: heptane is a VOC with CNS depression effects at high concentrations and a very low flash point (extremely flammable). Apply outdoors or in a well-ventilated space, wear an organic vapor respirator, and keep away from sparks or open flame. Don't apply to hot panels — the vapor concentration near the surface will spike.

Health & environment profile

VOC
yes
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
yes
Biodegradable
yes
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
3/5
Purpose: Volatile carrier solvent for coatings

Common questions about Heptane

What is Heptane used for in car care?
Volatile carrier solvent for coatings
Is Heptane a VOC?
Yes. Heptane is classified as a volatile organic compound (VOC).
Is Heptane on California's Proposition 65 list?
No. Heptane is not on California's Proposition 65 list.
Is Heptane biodegradable?
Yes. Heptane has a confirmed biodegradable profile.

18 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.