Sodium Petroleum Sulfonate
- Corrosion inhibitors
- CAS 68608-26-4
CarCareTruth tracks Sodium Petroleum Sulfonate (CAS 68608-26-4) as a car-care ingredient.
H319 (eye irritation Cat 2) at the pure-substance level — relevant only if the mixture-level classification in SDS §2 includes H319. Oral and dermal LD50 >5000 mg/kg (low acute toxicity). Alkaline pH (~10) in aqueous solution; can cause mild eye irritation on direct contact.
Sodium petroleum sulfonate (CAS 68608-26-4) is a petroleum-derived anionic surfactant and corrosion inhibitor. It is produced by sulfonating petroleum distillate fractions and neutralizing with sodium hydroxide. In penetrating oils and lubricants, it functions as a rust and corrosion inhibitor by forming a protective film on metal surfaces.
The H319 eye irritation classification applies at the pure-substance level due to its alkaline pH (~10). In finished product formulations where the sodium sulfonate is diluted, this ingredient-level classification does not always carry through to the mixture-level GHS classification in SDS §2 — verify the mixture-level hazard statement before applying PPE escalation.
Health & environment profile
- VOC
- no
- Prop 65 listed
- no
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- no
- Bioaccumulative
- no
- Persistent
- yes
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 5/5
Common questions about Sodium Petroleum Sulfonate
- What is Sodium Petroleum Sulfonate used for in car care?
- Corrosion inhibitor, surfactant, lubricity additive
- Is Sodium Petroleum Sulfonate a VOC?
- No. Sodium Petroleum Sulfonate is not classified as a volatile organic compound (VOC).
- Is Sodium Petroleum Sulfonate on California's Proposition 65 list?
- No. Sodium Petroleum Sulfonate is not on California's Proposition 65 list.
No products on file contain this (yet)
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.