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3536-49-0 专利蓝V

专利蓝V
英文名称：calcium,4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]-6-hydroxybenzene-1,3-disulfonate
CAS：

3536-49-0

 分子式：C54H62CaN4O14S4
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专利蓝V简介

Patent Blue V, also called Food Blue 5, Sulphan Blue, Acid Blue 3, L-Blau 3, C-Blau 20, Patentblau V, Sky Blue, or C.I. 42051 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.[clarification needed]; It is not widely used, but in Europe it can be found in Scotch eggs, certain jelly sweets, blue Curaçao, certain jello varieties (though not in actual Jell-O brand products), among others. An important advantage is the very deep color it produces even at low concentration, a disadvantage is that it fades fairly quickly when exposed to light.
Patent Blue V is banned as a food dye in Australia and US, because health officials in these countries suspect that it may cause allergic reactions, with symptoms ranging from itching and nettle rash to nausea, hypotension, and in rare cases anaphylactic shock; it is therefore not recommended for children in those countries.
In medicine, Patent Blue V is used in lymphangiography and sentinel node biopsy as a dye to color lymph vessels. [clarification needed] It is also used in dental disclosing tablets as a stain to show dental plaque on teeth.
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 0.77volts is similar to that of other triphenylmethane dyes. It is usable as a reversible redox indicator in some analytical methods.
Because of its pH-dependent color, Patent Blue V was included in chemistry sets from Salter Science in the 1970s and 80s under the name Sky Blue.

专利蓝V基本信息

中文名称 专利蓝V 英文名称 calcium,4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]-6-hydroxybenzene-1,3-disulfonate
中文别名

专利蓝Ⅴ;

查看更多中文别名 		英文别名

Merantine Blue V; Acid Blue 3 calcium salt,Acid Blue V calcium salt,Food Blue 5; Patent Blue V and L; C.I. Acid Blue 3; Patent Blue V calcium salt; Blue ZN 3; patent blue V; Solar Pure Blue VX; Carmine Blue V; Acid blue 3; Acidal Carmine V; Schultz No. 826;

查看更多英文别名
CAS号 3536-49-0 分子式 C54H62CaN4O14S4
分子量 1159.43000 精确质量 1158.28000
PSA 315.28000 LOGP 11.25880

专利蓝V编号系统

UNII 8QE473DV1Z

专利蓝V物化性质

外观与性状：
暗蓝色粉末
熔点：
>300ºC

安全信息

安全说明：
S22; S24/25
危险类别码：
R40

生产方法及用途

用途

食用蓝色色素。

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3536-49-0 专利蓝V
专利蓝V
CAS号：3536-49-0 分子式：C54H62CaN4O14S4 分子量：1159.43000
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