Specification Sheet

Product Name
Dimethyl sulfoxide BioUltra, for molecular biology, ≥99.5% (GC)

Product Number
41639

Product Brand
SIGMA

CAS Number
67-68-5

Molecular Weight
78.13

Test

Specification

APPEARANCE (COLOR)Colorless
APPEARANCE (FORM)Liquid
PURITY (GC AREA %)≥ 99.5 %
REFRACTIVE INDEX N20/D1.478 - 1.480
FREEZING POINT17.5 - 20.4 C
WATER (COULOMETR.)≤ 0.10 %
RESIDUE (EVAPORATION)≤ 0.005 %
TRACE ANALYSIS (ADDITIONAL TESTS)FREE ACID (AS CH3COOH) ≤ 0.001 %
METAL TRACE ANALYSIS (ICP)CORRESPONDS TO REQUIREMENTS
ALUMINIUM (ICP)≤ 0.5 mg/kg
BARIUM (ICP)≤ 0.1 mg/kg
BISMUTH (ICP)≤ 0.1 mg/kg
CALCIUM (ICP)≤ 0.5 mg/kg
CADMIUM (ICP)≤ 0.05 mg/kg
COBALT (ICP)≤ 0.02 mg/kg
CHROMIUM (ICP)≤ 0.02 mg/kg
COPPER (ICP)≤ 0.02 mg/kg
IRON (ICP)≤ 0.5 mg/kg
POTASSIUM (ICP)≤ 0.5 mg/kg
LITHIUM (ICP)≤ 0.1 mg/kg
MAGNESIUM (ICP)≤ 0.1 mg/kg
MANGANESE (ICP)≤ 0.02 mg/kg
MOLYBDENUM (ICP)≤ 0.1 mg/kg
SODIUM (ICP)≤ 1 mg/kg
NICKEL (ICP)≤ 0.5 mg/kg
LEAD (ICP)≤ 0.1 mg/kg
STRONTIUM (ICP)≤ 0.1 mg/kg
ZINC (ICP)≤ 0.1 mg/kg
EXTRANEOUS ACTIVITIESDNAses, RNAses, Proteases, Phosphatases Not Detectable
RESIDUE (FILTER TEST)NO RESIDUE
UV - ABS. AT 280 NM≤ 0.22
RECOMMENDED RETEST PERIOD54 MONTHS