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CAS: 81-11-8
Molecular Formula:C14H14N2O6S2
Molecular Weight:370.4
EINECS:201-325-2
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%
What is 4,4′-Diamino-2,2′-stilbenedisulfonic acid CAS 81-11-8？
4,4 ‘- diaminodiphenyl-2,2’ – disulfonic acid belongs to the class of stilbene compounds and can be prepared by hydrogenation of its nitro substituted precursor compounds. 4,4 ‘- Diamino-2,2’ – stilbenedisilfonic acid is a yellow needle shaped hygroscopic crystal. Very slightly soluble in water, soluble in ethanol and ether, easily soluble in alkaline solutions.
Specification
| Item | Specification |
| pKa | -1.58±0.50(Predicted) |
| Melting point | 300 °C |
| Density | 1.4732 (rough estimate) |
| Vapor pressure | 1.3hPa at 25℃ |
| SOLUBLE | <0.1 g/100 mL at 23 ºC |
| Refractivity | 1.6510 (estimate) |
Application
4,4 ‘- Diamino-2,2’ – stilbenedisilfonic acid dye and intermediate such as fluorescent whitening agent. 4,4 ‘- Diamino-2,2’ – stilbenedisilfonic acid is used to produce fluorescent whitening agent, direct frozen yellow G and direct yellow R, and as insecticide
Packaging
Usually packed in 25kg/drum,and also can be do customized package.
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
