Polydimethylsiloxane, 3-aminopropyl-terminated
- Silicones
- CAS 106214-84-0
- IUPAC: alpha,omega-bis(3-aminopropyl)polydimethylsiloxane
Polydimethylsiloxane, 3-aminopropyl-terminated (CAS 106214-84-0) appears in 1 of the 2,122 car-care products CarCareTruth tracks (as of August 2026).
Supplier SDS data for amine-terminated polydimethylsiloxanes commonly classifies the neat substance as a skin irritant (Skin Irrit. 2, H315) and a serious eye hazard (Eye Dam. 1, H318) driven by the basic primary-amine end groups. At 7 to 13 percent in a ceramic coating it is a plausible co-driver of a mixture-level eye-damage classification alongside amine-functional silane coupling agents. Not volatile; the inhalation pathway is negligible for the polymer itself.
Aminopropyl-terminated polydimethylsiloxane (CAS 106214-84-0) is a linear silicone fluid whose chain ends carry primary amine groups. The amine ends make an otherwise inert silicone reactive: during cure they condense or crosslink with alkoxysilane partners, anchoring the soft, slick polydimethylsiloxane backbone into a hard silane or quartz coating network.
Application in ceramic coatings: At the 7 to 13 percent level, the amine-terminated silicone acts as a flexibilizer and slickness agent inside the cured film. The polydimethylsiloxane backbone lowers surface energy (water beading, easy wipe-down) and improves leveling during application, while the reactive ends prevent it from washing out the way a non-reactive silicone oil would.
Health note: The primary-amine end groups are alkaline and are what drive the irritation and eye-damage classifications reported in supplier safety data for the neat substance. Once the amine groups have reacted into the cured network, the finished film is inert; the exposure window is the wet product during application.
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 Polydimethylsiloxane, 3-aminopropyl-terminated
- What is Polydimethylsiloxane, 3-aminopropyl-terminated used for in car care?
- Amine-terminated silicone film-former. The 3-aminopropyl end groups react into the coating's silane crosslink network during cure, tying the flexible polydimethylsiloxane backbone into the hard ceramic matrix for slickness and leveling.
- Is Polydimethylsiloxane, 3-aminopropyl-terminated a VOC?
- No. Polydimethylsiloxane, 3-aminopropyl-terminated is not classified as a volatile organic compound (VOC).
- Is Polydimethylsiloxane, 3-aminopropyl-terminated on California's Proposition 65 list?
- No. Polydimethylsiloxane, 3-aminopropyl-terminated 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.