8.14051

Hexamethyldisiloxane

for synthesis

• Synonym(s): 2,2,4,4-Tetramethyl-3-oxa-2,4-disilapentane, HMDSO, Hexamethyldisiloxane
• Linear Formula: ((CH₃)₃Si)₂O
• CAS Number: 107-46-0
• Molecular Weight: 162.38
• MDL number: MFCD00008265
• EC Index Number: 203-492-7

Properties

• Quality Level: 200
• vapor pressure: 20 hPa ( 20 °C)
• assay: ≥98.5% (GC)
• form: liquid
• autoignition temp.: 340 °C
• potency: >12160 mg/kg LD₅₀, oral (Rat); >2000 mg/kg LD₅₀, skin (Rat)
• expl. lim.: 0.5-21.8 % (v/v)
• bp: 100 °C/1013 hPa
• mp: -68 °C
• transition temp: flash point 4 °C
• solubility: insoluble 0.00037 g/L
• density: 0.76 g/cm³ at 25 °C
• storage temp.: 2-30°C
• InChI: 1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3
• InChI key: UQEAIHBTYFGYIE-UHFFFAOYSA-N

Description

Analysis Note

Assay (GC, area%): ≥ 98.5 % (a/a)
Density (d 20 °C/ 4 °C): 0.762 - 0.764
Identity (IR): passes test

Safety Information

• Pictograms: GHS02,GHS09
• Signal Word: Danger
• Hazard Statements: H225 - H410
• Precautionary Statements: P210 - P233 - P240 - P241 - P242 - P273
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 2
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): 21.2 °F - closed cup
• Flash Point(C): -6 °C - closed cup