» Monothioglycerol contains not less than 97.0 percent and not more than 101.0 percent of C3H8O2S, calculated on the anhydrous basis.
Packaging and storage Preserve in tight containers.
Specific gravity 841: between 1.241 and 1.250.
Refractive index 831: between 1.521 and 1.526.
pH 791: between 3.5 and 7.0, in a solution (1 in 10).
Water, Method II 921: not more than 5.0%.
Residue on ignition 281: not more than 0.1%.
Selenium 291: 0.003%, a 200-µL test specimen being used.
Heavy metals, Method II 231: 0.002%.
Assay Dissolve about 400 mg of Monothioglycerol, accurately weighed, in 50 mL of water, and titrate with 0.1 N iodine VS, adding 3 mL of starch TS as the endpoint is approached. Each mL of 0.1 N iodine is equivalent to 10.82 mg of C3H8O2S.
Auxiliary Information Please check for your question in the FAQs before contacting USP.Chromatographic Column
USP32NF27 Page 1285
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.