Koch's acid (1-naphthylamine-3,6,8-trisulphonic acid)
AMINE- FUNCTION COMPOUNDS > Toluidines and their derivatives; salts thereof : > 1-Naphthylamine (alpha-naphthylamine), 2-Naphthylamine (betanaph thylamine) and their derivatives; salts thereof > Bronner's acid (2-naphthylamine-6-sulphonic acid), cleve's acid (1-naphthylamine-6-sulphonic acid), epsilon acid (1-naphthylamine-3,8-disulphonic acid), koch's acid (1-naphthylamine-3,6,8-trisulphonic acid), Laurent's acid (1-naphthylamine-5-sulphonic acid), tobias acid (2-naphthylamine-1-sulphonic acid) > Koch's acid (1-naphthylamine-3,6,8-trisulphonic acid)
Duty Rates
| Duty | Statutory | Effective (conditional) |
|---|---|---|
| Basic Customs Duty (BCD) | 7.5% | 7.5% |
| Social Welfare Surcharge (SWS) | 10% | 10% |
| AIDC | 7.5% | 7.5% |
| IGST | 18% | 18% |
IGST Notification: 045/2025 — Serial No. I229
Statutory = tariff schedule rates (what most importers pay). Effective = ICEGATE rate via notification — applies only if importer meets the notification conditions.
Related HS Codes in Chapter 29
292145252921452329214526292145222921452129214531