(Title for this new monographto become official April 1, 2010)
(Prior to April 1, 2010, it is expected that the current practice of labeling the article of commerce with the name Linoleoyl Macrogolglycerides will be continued.)
» Linoleoyl Polyoxylglycerides are mixtures of monoesters, diesters, and triesters of glycerol and monoesters and diesters of polyethylene glycols with a mean relative molecular weight between 300 and 400. They are produced by partial alcoholysis of unsaturated oils, mainly containing triglycerides of linoleic acid, with polyethylene glycol, by esterification of glycerol and polyethylene glycol with fatty acids, or as a mixture of glycerol esters and ethylene oxide condensate with the fatty acids of the unsaturated oils. The average molecular weight is not less than 90.0 percent and not more than 110.0 percent of the labeled nominal value.
Packaging and storage Preserve in tight containers, protected from light and moisture. Store at controlled room temperature.
Labeling Label it to indicate the average nominal molecular weight of esters as part of the official title.
B: It meets the requirements for Identification test B under Caprylocaproyl Polyoxylglycerides.
Acid value 401: not more than 2.0, determined on a 2.0-g specimen.
Hydroxyl value 401: between 45 and 65, determined on a 1.0-g specimen, accurately weighed.
Iodine value 401: between 90 and 110.
Peroxide value 401: not more than 12.0, determined on a 2.0-g specimen.
Saponification value 401: between 150 and 170, determined on a 2.0-g specimen.
Fatty acid composition 401: between 4% and 20% of palmitic acid is found; not more than 6% of stearic acid is found; not more than 1.0% each of arachidic acid and eicosenoic acid is found; between 20% and 35% of oleic acid is found; between 50% and 65% of linoleic acid is found; and not more than 2% of linolenic acid is found.
Refractive index 831: between 1.465 and 1.475, at 20.
Water, Method I 921: not more than 1.0%, determined on a 1.0-g specimen.
Total ash 561: not more than 0.1%, determined on a 1.0-g specimen.
Heavy metals, Method II 231: 0.001%.
Limit of free ethylene oxide and dioxane Proceed as directed in the test for Limit of free ethylene oxide and dioxane under Caprylocaproyl Polyoxylglycerides: not more than 1 µg of ethylene oxide per g is found; and not more than 10 µg of dioxane per g is found.
Limit of free glycerol Proceed as directed in the test for Limit of free glycerol under Caprylocaproyl Polyoxylglycerides: not more than 5.0% is found.
Auxiliary Information Please check for your question in the FAQs before contacting USP.
USP32NF27 Page 1268Pharmacopeial Forum: Volume No. 34(4) Page 1015