Acid blue 3
更新时间：2020-12-18 22:54:27
采购访问：1次
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常用名 |
专利蓝V |
CAS号 |
3536-49-0 |
| 价格 |
$需询单/100mg $需询单/250mg $需询单/500mg |
纯度 |
98.0% |
| 备货期 |
3天 |
库存 |
现货 |
| 产品网页 |
http://www.dcchemicals.com/product_show-Acid_blue_3.html |
产品详情（用途，包装等）
Acid blue is also known as Patent Blue V, and is a dark bluish synthetic triphenylmethane dye used as a food coloring. As a food additive, it has E number E131. It is a sodium or calcium salt of [4-(α-(4-diethylaminophenyl)-5-hydroxy- 2,4-disulfophenylmethylidene)-2,5-cyclohexadien-1-ylidene] diethylammonium hydroxide inner salt. The color of the dye is pH-dependent. In aqueous solution, its color will vary from a deep blue in alkaline or weakly acidic medium to a yellow–orange in stronger acidic conditions. It is useful as a pH indicator for the range 0.8–3.0. The structure is also redox-sensitive, changing from a reduced yellow form to an oxidized red form in solution. The reduction potential of around 0.77 volts is similar to that of other triphenylmethane dyes. It is usable as a reversible redox indicator in some analytical methods. |
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