276855

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276855

Dimethyl sulfoxide

anhydrous, ≥99.9%

All Photos(4)

Synonym(s):

DMSO

Linear Formula:

(CH₃)₂SO

CAS Number:

67-68-5

Molecular Weight:

78.13

Beilstein:

506008

EC Number:

200-664-3

MDL number:

MFCD00002089

PubChem Substance ID:

57648266

grade

anhydrous

Quality Level

200

vapor density

2.7 (vs air)

vapor pressure

0.42 mmHg ( 20 °C)

Assay

≥99.9%

form

liquid

autoignition temp.

573 °F

expl. lim.

42 %, 63 °F

impurities

<0.005% water

evapn. residue

<0.0005%

color

colorless

refractive index

n20/D 1.479 (lit.)

bp

189 °C (lit.)

mp

16-19 °C (lit.)

solubility

H₂O: miscible (completely)

density

1.10 g/mL (lit.)

SMILES string

CS(C)=O

InChI

1S/C2H6OS/c1-4(2)3/h1-2H3

InChI key

IAZDPXIOMUYVGZ-UHFFFAOYSA-N

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This Item	94563	1.01900	41640-M
Sigma-Aldrich 276855 Dimethyl sulfoxide	Supelco 94563 Dimethyl sulfoxide	Supelco 1.01900 Dimethyl sulfoxide	Sigma-Aldrich 41640-M Dimethyl sulfoxide
grade anhydrous	grade analytical standard	grade -	grade ACS reagent, puriss. p.a.
vapor density 2.7 (vs air)	vapor density 2.7 (vs air)	vapor density 2.7 (vs air)	vapor density 2.7 (vs air)
vapor pressure 0.42 mmHg ( 20 °C)	vapor pressure 0.42 mmHg ( 20 °C)	vapor pressure 0.42 mmHg ( 20 °C)	vapor pressure 0.42 mmHg ( 20 °C)
assay ≥99.9%	assay ≥99.95% (GC)	assay ≥99.8% (GC)	assay ≥99.9% (GC)
form liquid	form -	form liquid	form liquid
autoignition temp. 573 °F	autoignition temp. 573 °F	autoignition temp. 573 °F	autoignition temp. 573 °F

General description

Dimethyl Sulfoxide is an apolar protic solvent that is generally used as a reaction medium and reagent in organic reactions.

Application

Dimethyl Sulfoxide may be used as an oxidant for the conversion of isonitriles into isocyanates. DMSO activated by oxalyl chloride can be used in the oxidation of long-chain alcohols to carbonyls.

Packaging

18 L, 200 L packaged in Pure-Pac^® stainless steel containers; 100 mL, 250ml, 1 L, 2 L, 6×1 L packaged in Sure/Seal^® bottles

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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.

Other Notes

For information on dimethyl sulfoxide miscibility, please visit the following link:
Dimethyl Sulfoxide Miscibility/Immiscibility Table

Pure-Pac^® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723.

The article number 276855-4X2L will be discontinued. Please order the single bottle 276855-2L which is physically identical with the same exact specifications.

Legal Information

Pure-Pac is a registered trademark of Sigma-Aldrich Co. LLC

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

188.6 °F - closed cup

Flash Point(C)

87 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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