No. BHT is not classified as a volatile organic compound (VOC).

Is BHT on California's Proposition 65 list?

No. BHT is not on California's Proposition 65 list.

BHT

Antioxidants
CAS 128-37-0
IUPAC: 2,6-di-tert-butyl-4-methylphenol

BHT (CAS 128-37-0) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).

BHT (butylated hydroxytoluene) carries no GHS human-health hazard classification; its only assigned code is H412 (harmful to aquatic life with long-lasting effects), an environmental classification. It is not on California's Prop 65 list, and IARC classifies it as Group 3 (not classifiable as to its carcinogenicity to humans). It is a permitted food and cosmetic antioxidant.

Health & environment profile

VOC: no
Prop 65 listed: no
Asthmagen: no
EPA Safer Choice: no
Aquatic toxicity: yes
Biodegradable: no
Bioaccumulative: no
Persistent: yes
Ozone depleting: no
Microplastic: no
PFAS: no

Purpose: Antioxidant additive used in fuel stabilizers, lubricants, and petroleum products to inhibit oxidation and prevent gum/varnish formation during storage.

Common questions about BHT

What is BHT used for in car care?: Antioxidant additive used in fuel stabilizers, lubricants, and petroleum products to inhibit oxidation and prevent gum/varnish formation during storage.
Is BHT a VOC?: No. BHT is not classified as a volatile organic compound (VOC).
Is BHT on California's Proposition 65 list?: No. BHT is not on California's Proposition 65 list.

1 product contain this

OWATROL Polytrol Colour Restorer
trim-restorer

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.