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4-(4-Nitrophenylazo)resorcinol 是一种紫色偶氮染料,作为 pH 指示剂,在 pH 值低于 11 时呈黄色,高于 13 时呈紫色。在微碱性或碱性环境中,如存在镁盐,它会变为深蓝色。偶氮紫也用于检测铵离子,氯化铵或氢氧化铵溶液的颜色根据偶氮紫的浓度而变化。
4-(4-Nitrophenylazo)resorcinol 是一种紫色偶氮染料,作为 pH 指示剂,在 pH 值低于 11 时呈黄色,高于 13 时呈紫色。在微碱性或碱性环境中,如存在镁盐,它会变为深蓝色。偶氮紫也用于检测铵离子,氯化铵或氢氧化铵溶液的颜色根据偶氮紫的浓度而变化。
规格 | 价格 | 库存 | 数量 |
---|---|---|---|
10 mg | 询价 | 待询 | |
50 mg | 询价 | 待询 |
产品描述 | 4-(4-Nitrophenylazo)resorcinol, also known as Azo Violet, is an azo purple dye used experimentally as a pH indicator, turning yellow below pH 11 and purple above pH 13. It becomes dark blue in slightly alkaline or alkaline environments with magnesium salts and can also test for ammonium ions, with the color changing based on the concentration of Azo Violet in ammonium chloride or ammonium hydroxide solutions. |
别名 | 偶氮紫, Magneson I, Azo Violet |
分子量 | 259.22 |
分子式 | C12H9N3O4 |
CAS No. | 74-39-5 |
存储 | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
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