[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

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

New Products

Cyclopentane-1,2-dione 8-hydroxy-7-methoxy-2,6-dimethylisoquinolinium iodide Isopropyl amine Hydrochloride 3-Aminophenylacetic acid 2-Bromo-5-iodopyridine 4-isothiocyanato-2-(trifluoroMethyl)benzonitrile Amino-4-methoxyben-zeneacetic acid 1-AMino-cyclobutaneMethanol HCl (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid Cefuroxime EP Impurity-A N-Nitroso hydroxy Cetrizine EP Impurity-A Noradrenaline EP Impurity D/Noradrenaline Methyl Ether Cetirizine EP Impurity A/Cetirizine CBHP Impurity Lantanoprost rc B Clidinium Bromide Impurity 3,4 Diethoxy Benzylcyanide 3,4 Dimethoxy Benzylcyanide valeronitrile 3-Hydroxypropionitrile 4-Bromo Benzylcyanide 3-chlorobenzyl cyanide 1-(3,5-dichlorophenyl)-2,2,2-trifluoroethane-1-sulfonyl chloride S-(1-(3,5-dichlorophenyl)-2,2,2-trifluoroethyl) ethanethioate (2S)-1-((2S,3S)-3-(2-methylbutyl)-4-oxooxetan-2-yl)pentadecan-2-yl formylleucinate

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5,5'-Dibromo-4,4'-dichloro-2,2'-bi[1H-indole]-3,3'-diol bis(sulfuric acid sodium) salt

disodium 5-chloro-2-[4-chloro-1-(sulphonatooxy)-2-naphthyl]-7-methoxy-4-methyl-1H-indol-3-yl sulphate

disodium 5,5',7,7'-tetrabromo[2,2'-bi-1H-indole]-3,3'-diyl disulphate

Vat Brown 1, Solubilised

4,5,5',7,7'-Pentabromo-2,2'-bi[1H-indole]-3,3'-diol bis(sulfuric acid sodium) salt

Solubilised Vat Blue 41

[2,2'-Bibenzo[4,5]phenaleno[1,9-bc]thiophene]-5,5'-diol, bis(hydrogen sulfate), disodium salt