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Solvents REACH

Octamethyltrisiloxane

CAS Number
107-51-7
EC Number
203-497-4
Chemical Formula
C8H24O2Si3
Molecular Weight
236.53 g/mol

Description

Octamethyltrisiloxane (CAS 107-51-7 ) is a low-viscosity linear silicone fluid used as a carrier solvent, surface modifier, and lubricant across personal care, textile, and industrial applications. Its silicone backbone delivers exceptional spreadability and surface wetting without leaving heavy residues. This makes it a preferred base fluid where clean, fast-evaporating delivery is required for high-performance products. In personal care formulations, it functions as a lightweight carrier for active ingredients in skin serums and hair conditioning products. It also improves spreadability and skin feel in antiperspirants and cosmetic blends. Textile and leather finishing operations use it to impart softness, water repellency, and surface slip to treated substrates. It provides a smooth finish while maintaining the integrity of the underlying material. In metalworking and automotive lubricant formulations, it serves as a base fluid or co-solvent. It is valued where thermal stability and low surface tension are required for consistent film formation on metal parts. It also supports emulsification and dispersion processes where silicone-based wetting agents are needed. These agents stabilize formulations or improve substrate penetration in complex chemical mixtures and industrial coatings. The product is supplied as a clear, low-viscosity liquid available in technical and cosmetic grades. Cosmetic-grade material meets purity standards relevant to personal care applications and sensitive formulations. Packaging typically ranges from drums to IBC containers, with bulk supply available for industrial volumes. This ensures flexible logistics for both small-scale manufacturing and large-scale chemical processing plants. Contact us for supply of Octamethyltrisiloxane Request Quote

Other Names (Synonyms)

Trisiloxane, octamethyl- | 1,1,1,3,3,5,5,5-Octamethyltrisiloxane | dimethyl-bis(trimethylsilyloxy)silane | Pentamethyl(trimethylsilyloxy)disiloxane | Dimethylbis(trimethylsiloxy)silane | 9G1ZW13R0G | Pentamethyl(trimethylsiloxy)disiloxane | Trisiloxane, 1,1,1,3,3,5,5,5-octamethyl-

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-80 °C
Boiling Point152-153 °C
Density0.820 g/cm³
Flash Point99 °F
Appearanceclear colourless liquid
ColorColourless to Pale Yellow
Formliquid
Water Solubility34μg/L at 23℃
Vapor Pressure5.3hPa at 25℃
Refractive Indexn 20/D 1.384(lit.)
Log P6.6 at 25.3℃

Safety & Handling

Warning
GHS02· Flammable

Hazard Statements

H226Flammable liquid and vapor
H413May cause long lasting harmful effects to aquatic life

Precautionary Statements

P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P501Dispose of contents/container in accordance with local regulations.
P378Use … for extinction.
P235Store in a well-ventilated place. Keep cool.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.

Trade & Regulatory

HS Code29319090
UN Number1993
ADR Class3
Packing GroupIII
Storage Class3 - Flammable liquids
WGK (Germany)3