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Certificate of Analysis
Product Name: Dimethyl sulfoxide Catalogue Number: GR-679
Batch Size: 800KG Lot Number: 20230709
CAS Number: 67-68-5 Production Date:
Molecular Formula: C2H6OS Report Date: 2023-07-09
Molecular Weight: 78.14 Expiry Date:
Storage: Room temperature, Protected from light and Sealed


Test Items Specifieation Results
Appearance Colorless liquid Conforms
Purity ≥99.9% 99.96%
Water ≤1000 ppm 465 ppm
Freezing Point °C ≥18.10 18.40
Acid Value(mg KOH/g) ≤0.03 0.01
Transmittance (400nm) /% ≥96.00 100.10
Refractive Index (20°C) 1.4775 - 1.4790 1.4786
Relative density at 25 °C ≥1.093 1.100
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