4,4'-Diamino-2,2'-stilbenedisulfonic acid 81-11-8

Superiority:

Product Name: 4,4'-Diamino-2,2'-stilbenedisulfonic acid
Synonyms: diaminostilbenedisulfonicacid;4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid;4',4" Diamino stillbene 2'2" disulphonic acid;1,2-bis(4-amino-2-sulfophenyl)ethene;4,4'-Diamino-2,2'-stibenedisulfonic acid;4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACI D, TECH., 85%;2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci;2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid
CAS: 81-11-8
MF: C14H14N2O6S2
MW: 370.4
EINECS: 201-325-2
Product Categories: Stilbenes;Fluorescent Labels & Indicators;Intermediates of Dyes and Pigments
Mol File: 81-11-8.mol

4,4'-Diamino-2,2'-stilbenedisulfonic acid Chemical Properties
Melting point  300 °C
density  1.4732 (rough estimate)
refractive index  1.6510 (estimate)
storage temp.  -20°C Freezer
pka -1.58±0.50(Predicted)
form  Crystalline Powder
color  Cream to yellow-brown
Water Solubility  <0.1 g/100 mL at 23 ºC
Merck  14,595
BRN  629516
Stability: Stable. Combustible. Incompatible with iron, strong oxidizing agents.
CAS DataBase Reference 81-11-8(CAS DataBase Reference)
EPA Substance Registry System Amsonic acid (81-11-8)

Safety Information
Hazard Codes  C,Xn
Risk Statements  34-22-36/37/38-20/21/22
Safety Statements  24/25-45-36/37/39-26-22
RIDADR  UN 2583
RTECS  WJ6603000
TSCA  Yes
HS Code  29215900
Hazardous Substances Data 81-11-8(Hazardous Substances Data)

4,4'-Diamino-2,2'-stilbenedisulfonic acid Usage And Synthesis
Chemical Properties Light Yellow Powder
Uses In manufacture of dyes, bleaching agents.
General Description Odorless yellowish microscopic needles or cream-colored powder. pH approximately 4.3 at 30 g/L water (suspension).
Air & Water Reactions Insoluble in water.
Reactivity Profile 4,4'-Diamino-2,2'-stilbenedisulfonic acid is incompatible with iron. 4,4'-Diamino-2,2'-stilbenedisulfonic acid forms sparingly water-soluble, crystalline salts with many bisquaternary ammonium bases.
Fire Hazard Flash point data for 4,4'-Diamino-2,2'-stilbenedisulfonic acid are not available; however, 4,4'-Diamino-2,2'-stilbenedisulfonic acid is probably combustible.