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8.14750

Sigma-Aldrich

Octamethylcyclotetrasiloxane

for synthesis

Synonym(s):

Octamethylcyclotetrasiloxane, Octamethyltetrasiloxane

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About This Item

Empirical Formula (Hill Notation):
C8H24O4Si4
CAS Number:
Molecular Weight:
296.62
MDL number:
UNSPSC Code:
12352103
EC Index Number:
209-136-7
NACRES:
NA.22

vapor pressure

1.3 hPa ( 20 °C)

Quality Level

assay

≥98.0% (GC)

form

liquid

autoignition temp.

400 °C

potency

>2000 mg/kg LD50, oral (Rat)
>2400 mg/kg LD50, skin (Rat)

expl. lim.

0.4-11.7 % (v/v)

kinematic viscosity

1.6 cSt(20 °C)

bp

176 °C/1013 hPa

mp

18 °C

transition temp

flash point 51 °C

solubility

<0.001 g/L (Hydrolysis)

density

0.95 g/cm3 at 25 °C

storage temp.

2-30°C

InChI

1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3

InChI key

HMMGMWAXVFQUOA-UHFFFAOYSA-N

Analysis Note

Assay (GC, area%): ≥ 98.0 % (a/a)
Refractive index (n 25°/D): 1.394 - 1.395
Due to its specific melting range the product may be solid, liquid, a solidified melt or a supercooled melt.

signalword

Warning

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 3 - Repr. 2

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

123.8 °F - closed cup

flash_point_c

51 °C - closed cup


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