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HomeProduct name list[2,2'-Bi-1H-indole]-3,3'-diol, 5-bromo-, bis(hydrogen sulfate) (ester), disodium salt

[2,2'-Bi-1H-indole]-3,3'-diol, 5-bromo-, bis(hydrogen sulfate) (ester), disodium salt

  • CAS NO.:5156-38-7
  • Empirical Formula: C32H22Br2N4Na2O16S4
  • Molecular Weight: 1052.58182
  • EINECS: 610-692-1
[2,2'-Bi-1H-indole]-3,3'-diol, 5-bromo-, bis(hydrogen sulfate) (ester), disodium salt Structural

What is [2,2'-Bi-1H-indole]-3,3'-diol, 5-bromo-, bis(hydrogen sulfate) (ester), disodium salt?

Preparation

(a) in the presence of ?Pyridine?, with Chlorosulfonic acid treatment C.I. Vat Blue 3 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing C.I. Vat Blue 3. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

Properties and Applications

red light blue. Soluble in water is blue.

Standard Ironing Fastness Chlorine bleach Light Fastness Mercerized Oxygen bleach Soaping
Fading Stain
ISO 4 3 3-4 4 3-4

Safety information for [2,2'-Bi-1H-indole]-3,3'-diol, 5-bromo-, bis(hydrogen sulfate) (ester), disodium salt

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