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CarCareTruth

Ethoxylated/Propoxylated Silicone Surfactant

  • Silicones
  • CAS 64365-23-7
  • IUPAC: Siloxanes and silicones, di-me, hydroxy-terminated, ethoxylated propoxylated

Ethoxylated/Propoxylated Silicone Surfactant (CAS 64365-23-7) appears in 1 of the 2,122 car-care products CarCareTruth tracks (as of August 2026).

No mixture-level health hazard classification is driven by this ingredient in the products where it appears; its SDS Section 3 entry carries only the aquatic H411 code, no acute toxicity, irritation, or sensitization classification at ingredient level.

This is a silicone-polyether (ethoxylated/propoxylated dimethyl siloxane) surfactant used to reduce surface tension in water-based rinseless and waterless wash concentrates. Combining a silicone backbone with hydrophilic ethoxylate/propoxylate side chains lets the diluted working solution spread evenly across a panel and helps lift and suspend contamination into the wash towel rather than dragging it across the paint.

At the manufacturer's disclosed concentration (3-<5% of the concentrate), the ingredient's own SDS classification is limited to aquatic harm (H411, Aquatic Chronic Category 2) and contributes to a finished product's overall aquatic-toxicity classification through GHS mixture-additivity math. It carries no confirmed carcinogenicity, sensitization, or acute-toxicity classification at the ingredient level.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
yes
Biodegradable
no
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
3/5
Purpose: Silicone-polyether surfactant; lowers surface tension so the diluted working solution wets the panel evenly and helps encapsulated dirt release into the towel during the dip-wring-wipe method

Common questions about Ethoxylated/Propoxylated Silicone Surfactant

What is Ethoxylated/Propoxylated Silicone Surfactant used for in car care?
Silicone-polyether surfactant; lowers surface tension so the diluted working solution wets the panel evenly and helps encapsulated dirt release into the towel during the dip-wring-wipe method
Is Ethoxylated/Propoxylated Silicone Surfactant a VOC?
No. Ethoxylated/Propoxylated Silicone Surfactant is not classified as a volatile organic compound (VOC).
Is Ethoxylated/Propoxylated Silicone Surfactant on California's Proposition 65 list?
No. Ethoxylated/Propoxylated Silicone Surfactant is not on California's Proposition 65 list.

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.