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CERTIFICATE OF ANALYSIS
PRODUCT IPTG/（Isopropyl-β-（D）-Thiogalactopyranoside）
CAS No. 367-93-1
BATCH NO M10911/02-10
TEST/PARAMETER STANDARD RESULTS
Description White Crystalline Powder White Crystalline Powder
Solubility Soluble in water and methanol Soluble in water and methanol
Identification by IR The IR spectrum of the sample
should be concordant with the
working standard.
Complies
pH 5% in water 5.0 – 7.0 6.32
Absorbance 5% w/v
Soluble in water.
（a） 300 nm
（b） 400 nm
Not more than 0.15
Not more than 0.06
0.12
0.04
Melting Range 110oC – 114oC 110oC – 113oC
Moisture Content by KF NMT1.0% w/w 0.22% w/w
1,4-Dioxane Should be absent Not detected
Specific Optical Rotation -28.5o to -34.5o -31.64o
Purity by HPLC NLT 98.00% 99.87%
Assay by HPLC 98 – 101% w/w 99.26%
RESULT: The product complies with the above specifications.