Octamethylcyclotetrasiloxane
Suppliers
Names
[ CAS No. ]:
556-67-2
[ Name ]:
Octamethylcyclotetrasiloxane
[Synonym ]:
EINECS 209-136-7
Cyclotetrasiloxane, 2,2,4,4,6,6,8,8-octamethyl-
Octamethylcyclotetrasiloxane
MFCD00003269
2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane
2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
Chemical & Physical Properties
[ Density]:
1.0±0.1 g/cm3
[ Boiling Point ]:
175.0±0.0 °C at 760 mmHg
[ Melting Point ]:
17-18 °C(lit.)
[ Molecular Formula ]:
C8H24O4Si4
[ Molecular Weight ]:
296.616
[ Flash Point ]:
63.2±23.0 °C
[ Exact Mass ]:
296.075165
[ PSA ]:
36.92000
[ LogP ]:
2.87360
[ Vapour density ]:
1 (vs air)
[ Vapour Pressure ]:
1.6±0.3 mmHg at 25°C
[ Index of Refraction ]:
1.423
[ Storage condition ]:
2-8°C
[ Water Solubility ]:
INSOLUBLE
MSDS
Toxicological Information
CHEMICAL IDENTIFICATION
- RTECS NUMBER :
- GZ4397000
- CHEMICAL NAME :
- Cyclotetrasiloxane, octamethyl-
- CAS REGISTRY NUMBER :
- 556-67-2
- BEILSTEIN REFERENCE NO. :
- 1787074
- LAST UPDATED :
- 199712
- DATA ITEMS CITED :
- 14
- MOLECULAR FORMULA :
- C8-H24-O4-Si4
- MOLECULAR WEIGHT :
- 296.68
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
- TYPE OF TEST :
- Standard Draize test
- ROUTE OF EXPOSURE :
- Administration onto the skin
- SPECIES OBSERVED :
- Rodent - rabbit
- REFERENCE :
- 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,1230,1986
- TYPE OF TEST :
- Standard Draize test
- ROUTE OF EXPOSURE :
- Administration into the eye
- SPECIES OBSERVED :
- Rodent - rabbit
- REFERENCE :
- 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,1230,1986 ** ACUTE TOXICITY DATA **
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 1540 mg/kg
- TOXIC EFFECTS :
- Behavioral - tremor
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0538262
- TYPE OF TEST :
- LCLo - Lowest published lethal concentration
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 48 gm/m3/8H
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0538262
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Administration onto the skin
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 1770 mg/kg
- TOXIC EFFECTS :
- Behavioral - tremor Gastrointestinal - changes in structure or function of salivary glands Liver - other changes
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0538262
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Administration onto the skin
- SPECIES OBSERVED :
- Rodent - rabbit
- DOSE/DURATION :
- 794 uL/kg
- TOXIC EFFECTS :
- Kidney, Ureter, Bladder - hematuria
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0538262 ** OTHER MULTIPLE DOSE TOXICITY DATA **
- TYPE OF TEST :
- TCLo - Lowest published toxic concentration
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 300 ppm/6H/13W-I
- TOXIC EFFECTS :
- Liver - changes in liver weight
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0530406
- TYPE OF TEST :
- TCLo - Lowest published toxic concentration
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - mouse
- DOSE/DURATION :
- 697 ppm/6H/28D-I
- TOXIC EFFECTS :
- Liver - changes in liver weight
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0516677
- TYPE OF TEST :
- TCLo - Lowest published toxic concentration
- ROUTE OF EXPOSURE :
- Inhalation
- SPECIES OBSERVED :
- Rodent - hamster
- DOSE/DURATION :
- 697 ppm/6H/28D-I
- TOXIC EFFECTS :
- Liver - changes in liver weight
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0516677 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X3232 No. of Facilities: 128 (estimated) No. of Industries: 8 No. of Occupations: 12 No. of Employees: 3383 (estimated) No. of Female Employees: 1689 (estimated)
Safety Information
[ Symbol ]:
GHS02, GHS08
[ Signal Word ]:
Warning
[ Hazard Statements ]:
H226-H361-H413
[ Precautionary Statements ]:
P281
[ Personal Protective Equipment ]:
Eyeshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
[ Hazard Codes ]:
Xn:Harmful
[ Risk Phrases ]:
R53;R62
[ Safety Phrases ]:
S36/37-S46-S51-S61
[ RIDADR ]:
UN 1993 3/PG 3
[ WGK Germany ]:
1
[ RTECS ]:
GZ4397000
[ Packaging Group ]:
III
[ Hazard Class ]:
3
Synthetic Route
Precursor & DownStream
Precursor
DownStream
Articles
Environ. Technol. 30(10) , 1073-83, (2009)
Siloxanes are widely used in different applications: health care, dry cleaning, household products, paints and coatings, paper, personal care, for example. This explains their prevalence in the enviro...
Environ. Pollut. 190 , 109-14, (2014)
Spatial distribution and relationship of allometric measurements (length, weight and age) to liver concentrations of cyclic volatile methyl siloxanes (cVMS) including octamethylcyclotetrasiloxane (D4)...
Zhong Yao Cai 31(5) , 677-8, (2008)
To analyze the volatile oils chemical constituents of roots of Actinidia deliciosa.The volatile oils fraction of roots of Actinidia deliciosa. were extracted by water vapor distilling, and then the co...