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Merck

1.02950

Dimethyl sulfoxide

for spectroscopy Uvasol®

Synonym(s):

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

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About This Item

Linear Formula:
(CH3)2SO
CAS Number:
67-68-5
Molecular Weight:
78.13
UNSPSC Code:
12191502
NACRES:
NA.03
EC Index Number:
200-664-3
MDL number:
MFCD00002089
Beilstein/REAXYS Number:
506008
assay:
≥99.8% (GC)
technique(s):
UV/Vis spectroscopy: suitable
bp:
189 °C (lit.)
vapor pressure:
0.42 mmHg ( 20 °C)

Product Name

Dimethyl sulfoxide, for spectroscopy Uvasol®

InChI

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

SMILES string

CS(C)=O

InChI key

IAZDPXIOMUYVGZ-UHFFFAOYSA-N

vapor density

2.7 (vs air)

vapor pressure

0.42 mmHg ( 20 °C)

assay

≥99.8% (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

technique(s)

UV/Vis spectroscopy: suitable

impurities

≤0.0002 meq/g Acidity
≤0.0002 meq/g Alkalinity
≤0.05% Water

evapn. residue

≤0.0004%

color

APHA: ≤10

transmittance

270 nm, ≥35%
280 nm, ≥50%
310 nm, ≥80%
330 nm, ≥90%
350 nm, ≥97%

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.)

UV absorption

λ: 270 nm Amax: ≤0.46
λ: 280 nm Amax: ≤0.30
λ: 310 nm Amax: ≤0.10
λ: 330 nm Amax: ≤0.05
λ: 350 nm Amax: ≤0.013

storage temp.

2-30°C

Quality Level

100

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Other Notes

Explore various lab safety accessories and equipment for safe handling of solvents to increase your safety level from the first usage.

Legal Information

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

Analysis Note

Purity (GC): ≥ 99.8 %
Evaporation residue: ≤ 0.0004 %
Water: ≤ 0.05 %
Color: ≤ 10 Hazen
Acidity: ≤ 0.0002 meq/g
Alkalinity: ≤ 0.0002 meq/g
Transmission (at 270 nm): ≥ 35 %
Transmission (at 280 nm): ≥ 50 %
Transmission (at 310 nm): ≥ 80 %
Transmission (at 330 nm): ≥ 90 %
Transmission (from 350 nm): ≥ 97 %
Absorbance (at 270 nm): ≤ 0.46
Absorbance (at 280 nm): ≤ 0.30
Absorbance (at 310 nm): ≤ 0.10
Absorbance (at 330 nm): ≤ 0.05
Absorbance (from 350 nm): ≤ 0.013

Disclaimer

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

Features and Benefits

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

General description

Accurate analytic results in UV/VIS and infrared spectroscopy depend on the use of very pure solvents for sample preparation. The Uvasol<TMSYMBOL></TMSYMBOL> solvents range has been specially designed for spectroscopy and other applications requiring solvents of the highest spectral purity. The refinement process allows a greater degree of security in applications and avoids misinterpretation of analytical results caused by traces of UV, IR and fluorescence contamination. Uvasol<TMSYMBOL></TMSYMBOL> solvents offer best UV transmittance. In all specifications the minimum transmittance for 5 typical wavelengths are identified.

Storage Class

10 - Combustible liquids

wgk

WGK 1

flash_point_f

188.6 °F - closed cup

flash_point_c

87 °C - closed cup

Certificates of Analysis (COA)

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