1,1,5,5-tetramethyl-3,3-diphenyltrisiloxane CAS No.17875-55-7

Product name:1,1,5,5-Tetramethyl-3,3-diphenyl-trisiloxane  (CHEERSIL 8511CL/8511M)
CAS No.:17875-55-7
Molecular Weight:332.6
Appearance:Colorless Transparent Liquid
Density(25℃):0.994 g/cm3
Refractive Index(25℃):1.500
Boiling Point:133℃ at 11mmHg


Quality specification



Chroma (Pt-Co)

≤ 20

Purity (HPLC, %)

≥ 90.0 (CHEERSIL 8511CL)

≥ 98.0 (CHEERSIL 8511M)



CHEERSIL 8511CL/8511M is widely used as crosslinking agent of liquid silicone rubber, phenyl silicone rubber or phenyl resin, especially for LED encapsulation.


Package and Storage

The product is packed in 25L inner coating steel drum as net weight 20KG.

The product is strictly forbid exposing to the sun and mixing with acid or alkali.

When keep tightly storing at room temperature, it has a shelf life of six months from date of production.