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.