PENTAMETHYLCYCLOPENTASILOXANE Chemical Properties

Melting point:

-108°C

Boiling point:

54 °C/10 mmHg (lit.)

Density 

0.992 g/mL at 25 °C (lit.)

vapor pressure 

0.05-91Pa at 20℃

refractive index 

n20/D 1.392(lit.)

Flash point:

39°C

storage temp. 

2-8°C

form 

liquid

Specific Gravity

0.998

Water Solubility 

110-1000000000μg/L at 20℃

Hydrolytic Sensitivity

3: reacts with aqueous base

BRN 

1792134

LogP

-2.4-6.33 at 20℃

EPA Substance Registry System

Cyclopentasiloxane, 2,4,6,8,10-pentamethyl- (6166-86-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

16-26-36

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

F 

10-21

TSCA 

Yes

MSDS

• Language:English Provider:SigmaAldrich

PENTAMETHYLCYCLOPENTASILOXANE Usage And Synthesis

Uses

2,4,6,8,10-Pentamethylcyclopentasiloxane is an active reagent in the preparation of cyclolinear polysiloxanes and in the preparation of novel class of hybrid polyurethanes.

Flammability and Explosibility

Flammable

Toxics Screening Level

The ITSL for cyclic methylhydrogensiloxane, d5 has been changed from 0.04 μg/m3 to 0.1 μg/m3 based on annual averaging time.

PENTAMETHYLCYCLOPENTASILOXANE(6166-86-5)Related Product Information

• Methanol
• Copper(II) chloride dihydrate
• Sodium benzoate
• Potassium hydroxide
• Triethanolamine
• Barium hydroxide
• Carbon dioxide
• Pyrrole
• Calcium carbonate
• Silica, fumed
• PENTAMETHYLCYCLOPENTASILOXANE
• Decamethylcyclopentasiloxane
• PENTAVINYLPENTAMETHYLCYCLOPENTASILOXANE
• 3-HYDROXYPROPYLISOBUTYL-POSS
• [[DIMETHYL(TRIFLUOROMETHYL)ETHYL]SILYLOXY]HEPTACYCLOPENTYLTRICYCLOHEPTASILOXANEDIOL
• 1,3,5,7,9-PENTAMETHYLCYCLOPENTASILOXANE
• D5, [METHYL-14C]-
• TRIS((DIMETHYL(TRIFLUOROMETHYL)ETHYL)SILYLOXY)HEPTACYCLOPENTYLTRICYCLOHEPTASILOXANE