4,4'-dinitrostilbene-2,2'-disulphonic Acid (Dnst)

We are exporting and supplying of 4,4'-Dinitrostilbene-2,2'-Disulphonic Acid (DNST) with the following specification:
CAS NO:128-42-7
EC NO:204-885-6
Molecular Formula:C14H10N2O10S2
Molecular Weight:430.37
Specification:
InChI:InChI=1/C14H10N2O10S2.Na/c17-15(18)11-5-3-9(13(7-11)27(21,22)23)1-2-10-4-6-12(16(19)20)8-14(10)28(24,25)26;/h1-8H,(H,21,22,23)(H,24,25,26);/q;+1/p-1
Product description:
Category: Intermediates
CAS NO: 128-42-7
EC NO: 204-885-6
Molecular Formula: C14H10N2O10S2
Molecular Weight: 430.37
Chemical name: 4,4-Dinitrostilbene-2,2-disulfonic acid
Structural formula:

Quality index:
ItemIndex
(1)Appearanceorange powder
(2)Binitro acid content(gross dry product)%a a a Y80.0
(3)binitrobenzyl compound (gross dry product )%a 4.0
(4)Other organic impurities(gross dry product )%a a 2.0
(5)Inorganic salt(gross dry product )%a a a a a a a a 10.0
(6)Water insolubles(gross dry product)%a a a a a a a a 1.0
Main use: it is an intermediate of dyes, can be used to manufacture DSD acid.
Packing: 40kg plastic woven bag or upon clients' request.
Synonyms:4,4-Dinitrostilbene-2,2-disulfonic acid;4,4'-Dinitrostilbene-2,2'-Disulfonic Acid;2,2'-ethene-1,2-diylbis(5-nitrobenzenesulfonic acid);sodium 5-nitro-2-[2-(4-nitro-2-sulfophenyl)ethenyl]benzenesulfonate;
Molecular Structure:4,4'-dinitrostilbene-2,2'-disulphonic acid 128-42-7