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Solvent Naphtha (Petroleum), Medium Aliphatic

  • Aliphatic solvents
  • CAS 64742-88-7
  • IUPAC: Hydrocarbons, C9-12, n-alkanes, isoalkanes, cyclics, <2% aromatics

Solvent Naphtha (Petroleum), Medium Aliphatic (CAS 64742-88-7) appears in 2 of the 1,724 car-care products CarCareTruth tracks (as of June 2026). It is classified as a VOC.

Aspiration hazard Cat 1 (H304) — may be fatal if swallowed and enters airways. Medium aliphatic naphtha with low aromatic content (<2%); higher boiling-point profile than light naphtha (C9–C12 vs. C5–C12) results in lower vapor pressure and lower acute inhalation risk at ambient concentrations, but aspiration risk from ingestion is the primary concern.

Solvent naphtha (petroleum), medium aliphatic (CAS 64742-88-7) is a mid-range petroleum distillate fraction produced by fractional distillation and hydrotreating. The "medium aliphatic" designation reflects a C9–C12 hydrocarbon range with a lower vapor pressure than light aliphatic fractions, making it a preferred carrier for penetrating oils where fast evaporation would reduce dwell effectiveness.

In penetrating oils, medium aliphatic naphtha provides the thin, low-viscosity carrier that wicks into corroded threads and microscopic gaps in the rust interface. The H304 aspiration hazard classification is inherent to low-viscosity petroleum distillates regardless of boiling range. The aquatic toxicity classification (ingredient level) is typical for petroleum distillate fractions — not bioaccumulative under normal environmental concentrations.

Health & environment profile

VOC
yes
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
Env. score
2/5
Purpose: Medium-cut petroleum naphtha carrier solvent; diluent and wicking agent in penetrating oils and industrial lubricants

Common questions about Solvent Naphtha (Petroleum), Medium Aliphatic

What is Solvent Naphtha (Petroleum), Medium Aliphatic used for in car care?
Medium-cut petroleum naphtha carrier solvent; diluent and wicking agent in penetrating oils and industrial lubricants
Is Solvent Naphtha (Petroleum), Medium Aliphatic a VOC?
Yes. Solvent Naphtha (Petroleum), Medium Aliphatic is classified as a volatile organic compound (VOC).
Is Solvent Naphtha (Petroleum), Medium Aliphatic on California's Proposition 65 list?
No. Solvent Naphtha (Petroleum), Medium Aliphatic is not on California's Proposition 65 list.

2 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.