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polycao
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 1 (Ó×¶ùÔ°)
- ½ð±Ò: 1008.3
- Ìû×Ó: 185
- ÔÚÏß: 11.5Сʱ
- ³æºÅ: 125041
- ×¢²á: 2005-12-06
- רҵ: analytical chemistry
USP28
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Tartaric Acid C4H6O6 150.09 Butanedioic acid, 2,3-dihydroxy-; Butanedioic acid, 2,3-dihydroxy-, [R-(R*,R*)]-. Tartaric acid; L -(+)-Tartaric acid [526-83-0] and [87-69-4]. » Tartaric Acid, dried over phosphorus pentoxide for 3 hours, contains not less than 99.7 percent and not more than 100.5 percent of C4H6O6. Packaging and storage¡ª Preserve in well-closed containers. Identification¡ª A: It responds to the tests for Tartrate ¨¢191ñ. B: When ignited, it gradually decomposes, emitting an odor resembling that of burning sugar (distinction from citric acid). Specific rotation ¨¢781Sñ : between +12.0 and +13.0. Test solution: 200 mg per mL, in water. Loss on drying ¨¢731ñ¡ª Dry it over phosphorus pentoxide for 3 hours: it loses not more than 0.5% of its weight. Residue on ignition ¨¢281ñ : not more than 0.1%. Limit of oxalate¡ª Nearly neutralize 10 mL of a solution of it (1 in 10) with 6 N ammonium hydroxide, and add 10 mL of calcium sulfate TS: no turbidity is produced. Sulfate ¨¢221ñ¡ª To 10 mL of a solution (1 in 100) add 3 drops of hydrochloric acid and 1 mL of barium chloride TS: no turbidity is produced. Heavy metals, Method II ¨¢231ñ : 0.001%. Organic volatile impurities, Method I ¨¢467ñ : meets the requirements. Assay¡ª Place about 2 g of Tartaric Acid, previously dried and accurately weighed, in a conical flask. Dissolve it in 40 mL of water, add phenolphthalein TS, and titrate with 1 N sodium hydroxide VS. Each mL of 1 N sodium hydroxide is equivalent to 75.04 mg of C4H6O6. Auxiliary Information¡ª Staff Liaison : Catherine Sheehan, B.Sc., Scientist Expert Committee : (EMC) Excipients: Monograph Content USP28¨CNF23 Page 3097 Phone Number : 1-301-816-8262 |
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