| Identification | More | [Name]
DODECAMETHYLPENTASILOXANE | [CAS]
141-63-9 | [Synonyms]
DODECAMETHYLPENTASILOXANE
1,1,1,3,3,5,5,7,7,9,9,9-Dodecamethylpentasiloxane
dodecamethyl-pentasiloxan
Pentasiloxane, dodecamethyl-
Dodecamethyl-2,4,6,8-tetraoxa-1,3,5,7,9-pentasilanonane
Dodecamethylnonanepentasiloxane
Penta(dimethylsiloxane) | [EINECS(EC#)]
205-492-2 | [Molecular Formula]
C12H36O4Si5 | [MDL Number]
MFCD00039795 | [Molecular Weight]
384.84 | [MOL File]
141-63-9.mol |
| Chemical Properties | Back Directory | [Appearance]
clear colorless liquid | [Melting point ]
-81 °C (lit.) | [Boiling point ]
230 °C (lit.) | [density ]
0.875 g/mL at 25 °C(lit.)
| [vapor pressure ]
<1 mm Hg ( 20 °C)
| [refractive index ]
n20/D 1.392(lit.)
| [Fp ]
187 °F
| [storage temp. ]
Refrigerator | [solubility ]
Benzene (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) | [form ]
liquid | [color ]
Colourless | [Specific Gravity]
0.876 | [Water Solubility ]
70.41ng/L at 23℃ | [Hydrolytic Sensitivity]
1: no significant reaction with aqueous systems | [Merck ]
13,3438 | [Dielectric constant]
2.5（20℃） | [LogP]
9.411 at 25℃ | [CAS DataBase Reference]
141-63-9(CAS DataBase Reference) | [EPA Substance Registry System]
Pentasiloxane, dodecamethyl- (141-63-9) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
NA 1993 / PGIII | [WGK Germany ]
3
| [RTECS ]
SB0970000
| [TSCA ]
Yes | [HS Code ]
2931.90.9010 | [Hazardous Substances Data]
141-63-9(Hazardous Substances Data) | [Toxicity]
guinea pig,LDLo,oral,50gm/kg (50000mg/kg),Journal of Industrial Hygiene and Toxicology. Vol. 30, Pg. 332, 1948. |
| Hazard Information | Back Directory | [Chemical Properties]
clear colorless liquid | [Uses]
A non-cyclic polydimethyl siloxane. Study shows that it can be transformed by a specific microflora and in the natural environment degraded by mechanisms similar to other organic compounds. | [Uses]
As a basis for silicone oils or fluids designed to withstand extremes of temperature; as a foam suppressant in petroleum lubricating oil. | [Definition]
ChEBI: An organosiloxane that is pentasiloxane in which all the hydrogens have been replaced by methyl groups. Metabolite observed in cancer metabolism. | [Flammability and Explosibility]
Nonflammable | [Toxics Screening Level]
The initial threshold screening level (ITSL) for dodecamethylpentasiloxane remains at 0.1 μg/m3 based on an annual averaging time. |
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