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Sodium diisooctyl sulfosuccinate

  • Anionic surfactants
  • CAS 577-11-7
  • IUPAC: Sodium 1,4-bis(2-ethylhexyl) sulfobutanedioate

Sodium diisooctyl sulfosuccinate (CAS 577-11-7) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is readily biodegradable.

Mild skin and eye irritant at high concentrations per SDS ingredient-level classification (H318 at concentrated ingredient, H315). At 1–3% in-product concentration, below corrosion threshold. No carcinogenicity, no reproductive toxicity, no respiratory sensitization classification.

Sodium diisooctyl sulfosuccinate (CAS 577-11-7), also known as dioctyl sodium sulfosuccinate (DOSS), is an anionic surfactant used as a wetting agent in cleaning products. It reduces surface tension to improve penetration and contact on soiled surfaces.

At ingredient level it carries H318 (serious eye damage) in concentrated form and H315 (skin irritation), but at typical in-product concentrations of 1–3% these classifications do not reach the mixture-level threshold (which is why the SDS §2 mixture classification may show only H319 from SLES rather than H318 from DOSS at that dilution). Biodegradable in wastewater treatment systems. No PFAS, no Prop 65 listing, no endocrine disruption concern.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
yes
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
4/5
Purpose: Anionic wetting agent and emulsifier; improves penetration and surface contact in cleaning formulas (also known as dioctyl sodium sulfosuccinate / DOSS)

Common questions about Sodium diisooctyl sulfosuccinate

What is Sodium diisooctyl sulfosuccinate used for in car care?
Anionic wetting agent and emulsifier; improves penetration and surface contact in cleaning formulas (also known as dioctyl sodium sulfosuccinate / DOSS)
Is Sodium diisooctyl sulfosuccinate a VOC?
No. Sodium diisooctyl sulfosuccinate is not classified as a volatile organic compound (VOC).
Is Sodium diisooctyl sulfosuccinate on California's Proposition 65 list?
No. Sodium diisooctyl sulfosuccinate is not on California's Proposition 65 list.
Is Sodium diisooctyl sulfosuccinate biodegradable?
Yes. Sodium diisooctyl sulfosuccinate has a confirmed biodegradable profile.

1 product 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.