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Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates

  • Silicones
  • CAS 134737-05-6
  • IUPAC: Siloxanes and Silicones, dimethyl, 3-[3-[(3-coco amidopropyl)dimethylammonio]-2-hydroxypropoxy]propyl group-terminated, acetates (salts)

Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates (CAS 134737-05-6) appears in 1 of the 2,122 car-care products CarCareTruth tracks (as of August 2026).

Carries an ingredient-level Skin Sensitization Category 1 classification (H317) per SDS Section 3, which is the driver of this product's mixture-level H317 WARNING classification even though disclosed concentration is under 1%. No eye, inhalation, or systemic hazard classification at ingredient or mixture level.

This is a quaternary-ammonium-functionalized (cationic) dimethyl siloxane, disclosed by CAS number 134737-05-6 in Chemical Guys' HydroCharge+ Ceramic Spray Coating SDS at under 1% concentration. The coco-amidopropyl quaternary group gives the silicone backbone a cationic charge that helps it bond to a clear-coat or headlight-lens surface, while the siloxane (Si-O-Si) backbone provides the hydrophobic, water-beading film that "ceramic spray" products are marketed around.

Health: The SDS discloses this ingredient as Skin Sensitization Category 1 (H317, "may cause an allergic skin reaction") at the ingredient level, and this single ingredient is the sole driver of the product's mixture-level WARNING signal word and H317 classification, despite being present at under 1% by weight. No eye damage/irritation, inhalation, or systemic toxicity classification applies at either the ingredient or mixture level.

Environment: As a cured silicone film-former, it is expected to be environmentally persistent (silicones generally resist rapid biodegradation) but is not flagged for aquatic toxicity or bioaccumulation at mixture level, and it is not a fluorinated (PFAS) compound.

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
3/5
Purpose: Cationic quaternary-functionalized silicone; the hydrophobic ceramic/SiO2-marketed film-forming active in spray-on ceramic ' boosters' and quick-detailer coatings

Common questions about Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates

What is Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates used for in car care?
Cationic quaternary-functionalized silicone; the hydrophobic ceramic/SiO2-marketed film-forming active in spray-on ceramic ' boosters' and quick-detailer coatings
Is Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates a VOC?
No. Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates is not classified as a volatile organic compound (VOC).
Is Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates on California's Proposition 65 list?
No. Siloxanes and Silicones, Dimethyl, 3-[3-(3-Coco Amidopropyl)Dimethylammonio]-2-Hydroxypropoxy]Propyl Group-Terminated, Acetates 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.