Biotin (bye' oh tin). C10H16N2O3S244.31 1H-Thieno[3,4-d]imidazole-4-pentanoic acid, hexahydro-2-oxo-, [3aS-(3a,4,6a)]-; (3aS,4S,6aR)-Hexahydro-2-oxo-1H-thieno[3,4-d]imidazole-4-valeric acid [58-85-5]. DEFINITION Biotin contains NLT 97.5% and NMT 100.5% of biotin (C10H16N2O3S). IDENTIFICATION ASSAY • Procedure Sample: 500 mg of Biotin Blank: 100 mL of water Titrimetric system (See Titrimetry 541.) Mode: Direct titration Titrant: 0.1 N sodium hydroxide VS Endpoint detection: Visual Analysis Mix the Sample with 100 mL of water. Add phenolphthalein TS, and titrate the suspension slowly with the Titrant while heating and stirring continuously. Perform the Blank determination. Calculate the percentage of biotin (C10H16N2O3S) in the Sample taken: Result = {[(VS VB) × N × F]/W} × 100
Acceptance criteria: 97.5%100.5% SPECIFIC TESTS • Optical Rotation, Specific Rotation 781S Sample solution: 20 mg/mL in 0.1 N sodium hydroxide Acceptance criteria: +89 to +93 ADDITIONAL REQUIREMENTS • Packaging and Storage: Store in tight containers. Auxiliary Information Please check for your question in the FAQs before contacting USP.
USP35NF30 Page 2362 Chromatographic Column Chromatographic columns text is not derived from, and not part of, USP 35 or NF 30. |