020730

 

4,4'-DIAMINO -2,2'-STILBENEDISULFONIC ACID

 

SYNONYM:  4,4'-DIAMINOSTILBENE -2,2'-DISULFONIC ACID;     DSD ACID

 

FORMULA: C14H14N2O6S2

 

M. W.: 370.4

 

CAS NO.: 81-11-8

 

DESCRIPTION: LIGHT YELLOW PASTE OR POWDER, SOLUBLE IN ALCOHOL AND EITHER; INSOLUBLE IN WATER, READILY SOLUBLE IN ALKALI. EASILY BE OXIDIZED TO RED IN AIR, IT HAS PROPERTIES OF AROMATIC ACID AND AROMATIC AMINE.

 

SPECIFICATIONS:

 

AMINO VALUE

98%MIN.

96%MIN.

95%MIN.

CHROMA

7 MAX.

9 MAX.

9 MAX.

MOISTURE

0.8%MAX.

1.3%MAX.

1.2%MAX.

INSOLUBLES IN ALKALI

0.03%MAX.

0.06%MAX.

0.04%MAX.

BENZYL MATTER

0.01%MAX.

0.25%MAX.

0.25%MAX.

ISOCOMPOUND

2%MAX.

4%MAX.

3%MAX.

BEPAINTING DEGREE (440nm)

0.065

0.085

0.075

IRON (Fe3+)

50ppm MAX.

 

 

CHLORIDE (CL-)

300ppm MAX.

 

 

SULFATE (SO42-)

3000ppm MAX.

 

 

 

USES: USED IN MANUFACTURE OF FLUORESCENT WHITENING AGENT. DIRECT CHRYSOPHENINE G. DIRECT YELLOW R AND USED AS INSECT PREVENTIVE ETC.

 

PACKING: 25KG NOT POLY-WOVEN BAGS OR AS THE CUSTOMER’S REQUIREMENTS.