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D. ACID (DAHL'S ACID)
1.
 PRODUCT
:

D-Acid (Dahl's Acid)

2.
 CHEMICAL NAME
:

2-Napthylamine 5- Sulfonic Acid 6-Aminonaphthalene 1-Sulfonic Acid
3.
 STRUCTURE
:
4.
 MOLECULAR Wt.
:
 223
5.
 APPEARANCE
:

Greyish dry powder

6.
 ASSAY
:

80% min (on mol wt. 319)

7.
 INSOLUBLE MATTER :

0.2 % max

8.
 SOLUBILITY : Soluble in Dilute Alkali
9.
 PACKING : In HDPE bags with Polythene liner
10.
 SALE BASIS
:
 On 100% basis