1,3,5,7,9-Pentamethylcyclopentasiloxane
[CAS# 6166-86-5]

Identification

• Classification: Chemical reagent >> Silane reagent
• Name: 1,3,5,7,9-Pentamethylcyclopentasiloxane
• Synonyms: 2,4,6,8,10-Pentamethylcyclopentasiloxane; D 5H; LS 8990
• Molecular Formula: C₅H₂₀O₅Si₅
• Molecular Weight: 300.64
• CAS Registry Number: 6166-86-5
• EC Number: 228-204-7

Properties

• Density: 1.004 g/cm³ (20 °C)^*
• Melting point: -108 °C^**
• Boiling point: 169 °C^***
• Refractive index: 1.3930 (589.3 nm 20 °C)^*****
• Flash point: 52.9±18.7 °C, Calc.^****

^* Krasnova, T. L.

^** Sauer, R. O.

^*** "PhysProp" data were obtained from Syracuse Research Corporation of Syracuse, New York (US)

^**** Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^***** Sokolov, N. N.

Safety Data

• Hazard Symbols: Xi
• Risk Statements: R10;R36/37/38
• Safety Statements: S16;S26;S36

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	3	H226

• Transport Information: UN 1993C 3 / PGIII