DASDA, 4-4 Di-Amino Stilbene 2-2 Di-Sulphonic Acid,DNSDA,4-4 DI-NITRO STILBENE 2-2 DI SULPHONIC ACID,nast,NASDA,4-AMINO 4-NITRO STILBENE 2-2 DI SULPHONIC ACID,pntosa,PNTS,PARA NITRO TOLUENE ORTHO SULPHONIC ACID Mfg. & Exporters of : OBA & DYES INTERMEDIATES | An ISO 9001:2008 certified

Molecular Structure
Product Name 4-4 Dintro Stilbene 2-2 Disulphonic Acid
CAS N0 : 128.42.7
Purity 70% Min.
Appearance Orange - Yellow
Mol. weight 430 (Free Acid)
Emp. Formula C14H10O10N2S2
Solubility Soluble in hot water
Insoluble in Alkali 0.2 Max.
Form Supply Semi Dry Crystal Powder
Purity by HPLC 99 %  Min.
Dibenzyl Stilbene 0.5% Max.
Colour Value Red - 7.0 Max.
Yellow - 40.0 Max.
Inorganic Salt Chloride - 0.1%
Sulphate - 0.2%
Main Usage It is a kind of dyes intermediates. Can be used In manufacture of DSD Acid.
Packing 25/500 Kgs. of H.D.P.E. bags with separate liner inside or as per customer’s requirement.
 

Molecular Structure
Product Name 4-4 Dintro Stilbene 2-2 Disulphonic Acid
CAS No. 3709-43-1
Purity Min. - 75.0%
Appearance Pale Yellow
Mol. weight 474 (Sodium Salt)
Emp. Formula C14H8O10N2S2Na2
Form supply Semi - dried Powder
Insoluble Max. 0.2%
Application Intermediate for Direct Dyes (E.g. Direct Yellow-99, Yellow-6, Orange-39, Orange-34 etc.)
Packing 25/500 kgs. HDPE bag with separate liner inside or as per customer’s requirement.
Dibenzyl Stilbene Max. - 0.5%
Storage Inflammable in nature hence should be kept away from excess heat and fireplace.
Acute and cronitoxi The product does not appear to cause any hazard by inhalation of dust.
Handling instruction Rubber or plastic gloves, apron and boots should be worn together with goggles giving total eye protection.

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