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品 名: 2-噻吩乙酸 CAS:1918-77-0
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检验项目 Parameter |
标准规定 Specification |
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外 观 Appearance |
淡黄色至类白色结晶 Light yellow to white crystalline |
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鉴 别 Identification(HPLC) |
相关物质测定下,供试品溶液主峰的保留时间应与对照品溶液主峰的保留时间一致。 The retention time of the main peak of the test solution should be consistent with the retention time of the main peak of the reference solution. |
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水分 Water |
应不得过 0.5% Not more than |
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纯度 Purity |
不得低于 Not less than 99.0% |
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相关物质 Related substance |
3-噻吩乙酸 3-Thienylacetic acid |
不得超过 Not more than 0.5% |
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5-甲基噻吩-2-噻吩乙酸 5-Thienylmethyl-2-thienylacetic acid |
不得超过 Not more than 0.5% |
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单一最大未知杂质 Single maximum unknown impurity |
不得超过 Not more than 0.2% |
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总杂质 Total impurity |
不得超过 Not more than 1.0% |
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含 量 Assay by Titration
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( 折干计):不得低于 Not less than 98.0% |
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