HS Heading 2831
Dithionites and sulphoxylates
2 tariff lines in this heading, within chapter 28 (Inorganic chemicals; compounds of precious metals, rare-earth metals, radioactive elements or isotopes). Click any HS code for the full breakdown and a duty calculation.
| HS Code | Description | CD | SD | VAT | AIT | RD | AT | TTI |
|---|---|---|---|---|---|---|---|---|
| 28311000 | Dithionites And Sulphoxylates Of Sodium | 5 | 0 | 15 | 5 | 0 | 7.5 | 33.63% |
| 28319000 | Dithionites And Sulphoxylates (Excl. Of Sodium) | 5 | 0 | 15 | 5 | 0 | 7.5 | 33.63% |
Recorded imports
Between December 2025 and May 2026, NBR recorded commercial imports worth BDT 252,727,888 (2,392,186 kg) under this heading, across 2 of its 2 tariff lines.
| Month | Lines with imports | Net weight | Assessable value |
|---|---|---|---|
| December 2025 | 1 | 627,521 kg | BDT 57,625,944 |
| January 2026 | 2 | 344,405 kg | BDT 35,081,003 |
| February 2026 | 1 | 351,574 kg | BDT 53,699,112 |
| March 2026 | 2 | 65,304 kg | BDT 7,104,427 |
| April 2026 | 1 | 630,072 kg | BDT 54,520,331 |
| May 2026 | 2 | 373,310 kg | BDT 44,697,071 |
The largest lines by assessable value in May 2026:
Bonded imports. A further BDT 663,429,631 (4,126,474 kg) entered under the bonded-warehouse regime over the same months — duty-free inputs imported against an undertaking to re-export them. That is 72.4% of everything imported under this heading: most of this trade never pays the duty rates shown above.
Import figures: NBR Import Statements (IM-4 commercial, IM-7 bonded), December 2025 – May 2026. Assessable value is the customs value on which duty is charged, not the retail or invoice price.