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Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated)

  • Silicones
  • CAS 102782-92-3
  • IUPAC: Siloxanes and silicones, 3-[(2-aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated

Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) (CAS 102782-92-3) appears in 3 of the 2,122 car-care products CarCareTruth tracks (as of August 2026).

Eye irritant (H319, Cat 2A) at formulation strength per SDS §2. No H315 (skin) or H335 (respiratory) hazard statements issued for this ingredient. No PFAS concern. Amine functional groups can cause mild irritation on direct contact.

CAS 102782-92-3 is a functionalized polydimethylsiloxane (PDMS) — an aminosilicone bearing pendant aminoethylaminopropyl side chains and methoxy end groups. It is the primary fabric-protection active in Chemical Guys HydroThread and similar non-fluorinated fabric protectant formulations.

The aminoethylaminopropyl side chains bind to hydroxyl groups on fabric fibers (cotton, polyester, nylon), anchoring the hydrophobic silicone backbone to the textile surface. The methoxy end groups hydrolyze in the presence of moisture to form silanol bonds, enhancing adhesion durability. The result is a silicone film that causes liquids to bead on the fabric surface without penetrating fiber bundles.

This is organosilicon chemistry — no fluoropolymer, no PFAS. The ECHA database lists H319 (eye irritation Cat 2A) as the relevant health classification at formulation strength. No respiratory or skin H-codes are issued. Siloxane polymers are generally persistent in the environment but do not bioaccumulate in organisms at typical consumer-product use concentrations.

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
Purpose: Functional silicone active; the amine groups promote adhesion to fabric fibers while the siloxane backbone forms a hydrophobic film that causes liquids to bead and roll off treated fabric surfaces

Common questions about Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated)

What is Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) used for in car care?
Functional silicone active; the amine groups promote adhesion to fabric fibers while the siloxane backbone forms a hydrophobic film that causes liquids to bead and roll off treated fabric surfaces
Is Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) a VOC?
No. Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) is not classified as a volatile organic compound (VOC).
Is Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) on California's Proposition 65 list?
No. Aminosilicone (3-[(2-Aminoethyl)amino]propyl methyl, dimethyl, methoxy-terminated) is not on California's Proposition 65 list.

3 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.