5.43900

Dimethyl sulfoxide

for liquid chromatography LiChrosolv^®

• Synonym(s): Methanesulfinylmethane, Methyl sulfoxide, Dimethyl(oxido)sulfur, DMSO, DMSO
• Linear Formula: (CH₃)₂SO
• CAS Number: 67-68-5
• Molecular Weight: 78.13
• Beilstein: 506008
• MDL number: MFCD00002089
• EC Index Number: 200-664-3

Properties

• vapor density: 2.7 (vs air)
• Quality Level: 100
• vapor pressure: 0.42 mmHg ( 20 °C)
• product line: LiChrosolv^®
• grade: isocratic
• Assay: ≥99.7% (GC)
• form: liquid
• autoignition temp.: 573 °F
• expl. lim.: 42 %, 63 °F
• technique(s): HPLC: suitable
• impurities: ≤0.2% Water
• evapn. residue: ≤0.002%
• transmittance: 270 nm, ≥30%; 280 nm, ≥60%; 300 nm, ≥75%; 350 nm, ≥99%
• refractive index: n20/D 1.479 (lit.)
• kinematic viscosity: 2.14 cSt
• bp: 189 °C (lit.)
• mp: 16-19 °C (lit.)
• transition temp: flash point 87 °C
• density: 1.10 g/mL (lit.)
• storage temp.: 2-30°C
• SMILES string: CS(C)=O
• InChI: 1S/C2H6OS/c1-4(2)3/h1-2H3
• InChI key: IAZDPXIOMUYVGZ-UHFFFAOYSA-N

Description

Caution

Supercools easily and remelts slowly at room temperature. Solidified product can be re-liquified by warming to room temperature without detriment to the product.

Specifications

Saturation Concentration in Air: 8.0 g/m3 (20 °C)

Preparation Note

Product filtered through a 0.5 μm filter

Analysis Note

Purity (GC): ≥ 99.7 %
Water: ≤ 0.2 %
Evaporation residue: ≤ 0.002 %
Transmission (at 270 nm): ≥ 30 %
Transmission (at 280 nm): ≥ 60 %
Transmission (at 300 nm): ≥ 75 %
Transmission (from 350 nm): ≥ 99 %

Legal Information

LICHROSOLV is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 1
• Flash Point(F): 188.6 °F - closed cup
• Flash Point(C): 87 °C - closed cup