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磷酸二钠

  • 更新时间:  2018-01-01
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  • 简单描述
  • 磷酸二钠产品规格: AR,99% 包装:500克
详细介绍

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中文名称: 磷酸氢二钠
其他中文名称: 磷酸二钠;二盐基磷酸钠;十二水合磷酸氢二钠;十二水;十二水磷酸氢二钠;双盐基磷酸钠
英文名称: Sodium phosphate dibasic dodecahydrate
其他英文名称: sec-Sodium phosphate;di-Sodium hydrogen phosphate dodecahydrate;Disodium hydrogen phosphate dodecahydrate;Disodium phosphate
CAS号:10039-32-4
Na2HPO4·12H2O=358.14
级别:AR
含量:≥99.0%
pH(50g/L,25℃):9.1~9.4
澄清度试验:合格
钾:≤0.01%
硫酸盐:≤0.005%
氯化物:≤0.001%
砷:≤0.0005%
水不溶物:≤0.005%
总氮量:≤0.002%
铁:≤0.0005%
重金属:≤0.0005%
性状:无色半透明结晶或白色颗粒粉末。溶于水,其水溶液呈弱碱性,1%水溶液的pH值为8.8~9.2,不溶于醇。35.1℃时熔融并失去5个结晶水。在空气中易风化,常温时放置于空气中失去约5个结晶水而形成七水物,加热至100℃时失去全部结晶水而成无水物,250℃时分解变成焦磷酸钠。在34℃以下小心干燥,可得白色粉末的二水磷酸氢二钠。水中溶解度:218 g/L (20°C)。密度:1.52;熔点:35℃。
用途:生化研究。分析用作缓冲剂,制备钩端螺旋体培养基,测定钾
保存:RT,避光
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