供货周期: | 现货 |
品牌: | Sigma-Aldrich |
型号: | AR级别,99% |
货号: | P112171 |
Product Name: Potassium dichromate solution
别名: | 重铬酸钾 ;红矾钾 |
CAS号: | 7778-50-9 |
分子式: | K2Cr2O7 |
分子量: | 294.18 |
EINECS编号: | 231-906-6 |
MDL号: | MFCD00011367 |
介绍: | 味苦。不吸湿或潮解(不同于重铬酸钠)。能溶于10份冷水或1.25份热水,不溶于乙醇, 水溶液呈酸性反应。强热约500℃时分解为氧化铬和铬酸钾。在盐酸中冷时不起作用,热时则发生氯气。有强氧化性,与有机物摩擦或撞击会引起燃烧。有毒,最小致死量(兔,皮下)10mg/kg。经流行病学调查表明,对人有潜在致癌危险性。 |
用途: | 标定硫代硫酸钠标准溶液的基准。点滴分析定氯,氧化剂,色谱分析用试剂,有机合成。测定肝功能黄胆指数。检验粪便等。 |
熔点: | 398℃ |
特定比重: | 1.0 |
贮存: | 密封阴凉处保存。 |
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