Dimethicone
time:2012-10-13 15:59:21,count:0

Dimethicone
Alias
Polydimethylsiloxanes
Polydimethylsiloxane
Poly(oxy(dimethylsilylene))
Polydimethyl siloxane
Silicones and siloxanes, dimethyl
PDMS
Category
Silicone surfactant-Non-ionic
CAS No.
9006-65-9, 9016-00-6, 63148-62-9
Structural Formula
Properties
Appearance: colorless liquid to solid.
Solubility: insoluble in water.
Stability: stable.
Risk: irritation, irritation to skin, eye.
Animal toxicity: mouse oral LD50[1]: >20000mg/Kg;
dog intraperitoneal LD[2]: > 410mg/Kg;
dog intrapleural LD[2]: > 410mg/Kg;
dog subcutaneous LD[2]: > 410mg/Kg;
mouse intraperitoneal LD[2]: > 5500mg/Kg;
mouse intrapleural LD[2]: > 5500mg/Kg;
mouse subcutaneous LD[2]: > 5500mg/Kg;
rat intraperitoneal LD[2]: > 2000mg/Kg;
rat intrapleural LD[2]: > 2000mg/Kg;
rat subcutaneous LD[2]: > 2000mg/Kg;
rat oral LD50[3]: > 17000mg/Kg;
rat oral LD50[3]: > 24000mg/Kg;
rat oral LD[3]: > 5000mg/Kg;
rat oral LD[3]: > 50mL/Kg;
rat intramuscular LD[3]: > 1.2mL/Kg;
guinea pig oral LD[3]: > 10000mg/Kg;
mouse intraperitoneal LDLo[3]: 16mL/Kg;
rabbit inhalation LC[3]: > 978000mg/m3/7.5;
rabbit skin LD[3]: > 20mL/Kg;
rabbit skin LD[3]: > 10200mg/Kg;
rabbit skin LD[3]: > 2000mg/Kg.
Reproductive effect[2,3].
Ecology: May be hazardous to environment. Water body should be given special attention.
Biodegradability: biodegradable.
Characteristics: excellent dispersing, adsorbing, defoaming, brightening, lubricating, film-forming abilities. Nonmetallic elastomer.
Synthesis
 
Quality standards & test methods
item
physical and chemical indexes
test methods
actives*, %, ≥
98
 
*: should be marked on molecular weight.
Major Uses
Conditioning agent, emollient, defoaming agent, skin protective agent in personal care products. non-cumulative.
Use as lubricant, mold-release agent.
Use as defoaming agent.
Softening agent, brightening agent in leather, textile, fiber.
Use as pharmaceutical additives.
Use as sealant.
Used in non-metal processing. eg: lenses, bio-engineering.
Manufacturers
 
References
[1]:http://toxnet.nlm.nih.gov/:9006-65-9
[2]:http://toxnet.nlm.nih.gov/:9016-00-6
[3]:http://toxnet.nlm.nih.gov/:63148-62-9
Update: 20140828(1);

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