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74811

Octamethylcyclotetrasiloxane

purum, ≥99.0% (GC)

Synonym(s):

2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, 2,2,4,4,6,6,8,8-Octamethylcyclotetrasiloxane, Cyclic dimethylsiloxane tetramer

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About This Item

Linear Formula:
[-Si(CH3)2O-]4
CAS Number:
556-67-2
Molecular Weight:
296.62
EC Number:
209-136-7
UNSPSC Code:
12352300
PubChem Substance ID:
24886726
Beilstein/REAXYS Number:
1787074
MDL number:
MFCD00003269
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vapor density

1 (vs air)

grade

purum

assay

≥99.0% (GC)

form

liquid

refractive index

n20/D 1.396

bp

175-176 °C (lit.)

mp

17-18 °C (lit.)

density

0.956 g/mL at 25 °C (lit.)

SMILES string

C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1

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

Other Notes

Reagent used for deactivating the surface of glass capillary columns in GC

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Warning

Hazard Classifications

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

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

123.8 °F - closed cup

flash_point_c

51 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Regulatory Information

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W. Bertsch et al.
HRC & CC. Journal of High Resolution Chromatography & Chromatography Communications, 5, 539-539 (1982)
T.I. Wishousky et al
Journal of Chromatography A, 249, 163-163 (1982)
Anne L Quinn et al.
Toxicological sciences : an official journal of the Society of Toxicology, 96(1), 145-153 (2006-12-19)
The purpose of these experiments was to determine the potential estrogenic, androgenic, and progestagenic activity of two cyclic siloxanes, octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5). Receptor-binding experiments and a luciferase reporter gene assay were used to determine if the materials were
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