Sr. No. Particulars Specification
1. Synonyms 2-amino 1,4 – benzenedisuphonic Acid

2,5 Disulfoaniline

4-Sulphometanilic Acid

2. Emperical Formula C6H₇NS₂O6
3. CAS No. 98 – 44 – 2
4. Purity (Amine Value Of Free Acid) 80% Min.
5. Molecular Weight (As Free Acid) 253 gm/mol.
6. HPLC % 99% Min.
7. Purity (Amine Value Of Sodium Salt) 87% Min.
8. Molecular weight (As Sodium Salt) 275.5 gm/mol.
9. Appearance Moist White Powder
10. Insoluble 0.15% Max.
11. Free Acid Content 4% Max.
12. Moisture Content (By K.F. Method) 5% Approx.
13. Metanilic Acid Content < 0.5%
14. Isometric Impurities Nil