1.02952 Supelco

Dimethyl sulfoxide

for analysis EMSURE® ACS

Synonym: DMSO, Methanesulfinylmethane, Methyl sulfoxide, Dimethyl(oxido)sulfur, DMSO

  • CAS Number 67-68-5

  • Linear Formula (CH3)2SO

  • Molecular Weight 78.13

  •  Beilstein/REAXYS Number 506008

  •  MDL number MFCD00002089

  •  EC Index Number 200-664-3



Quality Level   300
grade   ACS reagent
vapor density   2.7 (vs air)
vapor pressure   0.42 mmHg ( 20 °C)
assay   ≥99.9% (GC)
form   liquid
autoignition temp.   573 °F
potency   28300 mg/kg LD50, oral (Rat)
  40000 mg/kg LD50, skin (Rat)
expl. lim.   42 %, 63 °F
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
solubility   1000 g/L
density   1.10 g/mL (lit.)
SMILES string   CS(C)=O
InChI   1S/C2H6OS/c1-4(2)3/h1-2H3
storage conditions   Store at +5°C to +30°C.


General description

EMSURE grade solvents are suitable for a broad spectrum of classical lab applications, and are frequently used in regulated and highly demanding lab applications. EMSURE provides worldwide best and most extensive product specifications. We declare our EMSURE range to be in compliance with the ACS, with the reagent part of the European Pharmacopoeia (Reag. Ph Eur) and also with the ISO standards.


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


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

Analysis Note

Purity (GC): ≥ 99.9 %
Identity (IR): conforms
Appearance: clear
Color: ≤ 10 Hazen
Titrable acid: ≤ 0.0002 meq/g
Density (d 20 °C/20 °C): 1.101 - 1.103
Refractive index (n 20/D): 1.478 - 1.479
Melting point: ≥ 18.0 °C
Boiling point: 188 - 190 °C
Absorption: conforms
Heavy metals (as Pb): ≤ 0.0001 %
Fe (Iron): ≤ 0.0001 %
Related substances (GC): conforms
Readily carbonizable substances: conforms
Evaporation residue: ≤ 0.001 %
Water: ≤ 0.1 %

Legal Information

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

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.
Protocols & Articles


Analytical Method: Antimony in water and wastewater

Instruments: Cat.No. 173016  Spectroquant® Vis Spectrophotomter Prove 100 or Cat.No. 173017  Spectroquant® UV/VIS Spectrophotometer Prove 300 or Cat.No. 173018  Spectroquant® UV/VIS Spectrophotometer...

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