Silicones & Silicates
REACH
Hexamethyldisiloxane
CAS Number
26298-61-3
What is Hexamethyldisiloxane?
Hexamethyldisiloxane (CAS 26298-61-3), also known as Cosmetic Fluid 8108-OH, is a low-molecular-weight silicone fluid.
Where is Hexamethyldisiloxane used?
- Personal care: lightweight carrier
- Personal care: skin-feel modifier in serums, primers, and color cosmetics, leaving no greasy residue
- Industrial cleaning and metalworking: foam control in cutting fluids and process baths
- Polymer and resin manufacturing: processing aid and mold release component, improving surface finish and reducing cycle times
- Lubricants: stable, low-viscosity base layer for precision applications where conventional mineral oils introduce contamination risk
- It functions as a foam suppressant, lubricant, and surface modifier.
Good to know: Buyers sourcing for regulated cosmetic applications should confirm compliance documentation against relevant regional standards before procurement.
Commercial specifications
- Clear, low-viscosity liquid in standard drum and IBC packaging
Other Names (Synonyms)
Cosmetic fluid 8108-oh|Trimethyl(trimethylsilyloxy)silane|Hexamethyldisiloxane homopolymer
How is Hexamethyldisiloxane classified and handled safely? Learn More
Danger
GHS02· Flammable GHS09· Environmental Hazard GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H225 Highly Flammable liquid and vapor [Danger Flammable liquids]
H315 Causes skin irritation [Warning Skin corrosion/irritation]
H332 Harmful if inhaled [Warning Acute toxicity, inhalation]
H372 Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H400 Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]