4,4'-Dinitrostilbene-2,2'-disulfonic Acid (Disodium Salt)
DNSDA is a key chemical intermediate used primarily in the manufacture of fluorescent whitening agents (optical brighteners) and certain azo dyes. It is produced via the nitration and sulfonation of stilbene derivatives and is widely used in the paper, textile, and detergent industries.
| Chemical Name | 4,4'-Dinitrostilbene-2,2'-disulfonic Acid |
| Abbreviation | DNSDA |
| CAS No. | 128-42-7 |
| Molecular Formula | C₁₄H₁₀N₂O₁₀S₂Na₂ |
| Appearance | Yellow to Orange Powder / Granules |
| Purity | ≥ 95% |
| Pack Size | 25 kg / 50 kg / Bulk |
Applications
Para-Aminoacetanilide-ortho-Sulfonic Acid (4-Amino-2-Acetamidobenzene Sulfonic Acid)
PAABSA is an important aromatic amine intermediate used in the manufacture of reactive dyes, direct dyes, and sulfo-containing azo dyes. It plays a crucial role as a coupling and diazotizable component in dye synthesis, imparting excellent dyeing properties and improved wash fastness to the final dye product.
| Chemical Name | 4-Amino-2-Acetamidobenzene Sulfonic Acid |
| Abbreviation | PAABSA |
| CAS No. | 88-45-9 |
| Molecular Formula | C₈H₁₀N₂O₄S |
| Appearance | Off-White to Light Beige Powder |
| Purity | ≥ 98% |
| Pack Size | 25 kg / 50 kg / Bulk |
Applications
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