Polyoxyl 40 Hydrogenated Castor Oil
» Polyoxyl 40 Hydrogenated Castor Oil contains mainly the tri-hydroxystearate ester of ethoxylated glycerol, with smaller amounts of polyethylene glycol tri-hydroxystearate and of the corresponding free glycols. It results from the reaction of glycerol tri-hydroxystearate with about 40 to 45 moles of ethylene oxide.
Packaging and storage Preserve in tight containers.
A: Dissolve about 0.1 g in 1 mL of water, add 9 mL of sodium chloride solution (1 in 20), and heat in a water bath: the solution becomes turbid at a temperature between 70 and 85.
B: Dissolve about 0.1 g in 10 mL of alcoholic potassium hydroxide TS, boil for about 3 minutes, and evaporate to dryness. Mix the residue with 5 mL of water: it dissolves, yielding a clear solution. Add a few drops of glacial acetic acid: a white precipitate is formed.
Congealing temperature 651: between 16 and 26.
Acid value 401: not more than 2.0.
Hydroxyl value 401: between 60 and 80.
Iodine value 401: not more than 2.0.
Saponification value 401: between 45 and 69.
Water, Method I 921: not more than 3.0%.
Residue on ignition 281: not more than 0.3%.
Heavy metals, Method II 231: 0.001%.
Auxiliary Information Please check for your question in the FAQs before contacting USP.Chromatographic Column
USP32NF27 Page 1316
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.