HS Code 28319000
Dithionites And Sulphoxylates (Excl. Of Sodium)
Worked example
On an assessable value of BDT 100,000, the total duty and taxes payable on 28319000 would be approximately BDT 33,630.00, because the Total Tax Incidence is 33.63% of the assessable value.
What these figures mean
Dithionites And Sulphoxylates (Excl. Of Sodium) is classified under HS code 28319000, which sits in heading 2831 (Dithionites and sulphoxylates) of chapter 28 (Inorganic chemicals; compounds of precious metals, rare-earth metals, radioactive elements or isotopes).
Under the Bangladesh Operative Tariff 2026-2027 this line attracts Customs Duty of 5%, Supplementary Duty of 0%, VAT of 15%, Advance Income Tax of 5%, Regulatory Duty of 0% and Advance Tax of 7.5%. Combined, these produce a Total Tax Incidence of 33.63%, which is the figure to multiply by the assessable value of your consignment.
The assessable value is normally the CIF value of the goods plus landing charges. Duties and taxes are applied in a defined order rather than simply added together, which is why the TTI is not the plain sum of the individual rates.
Recorded imports
Between January 2026 and May 2026, NBR recorded commercial imports under 28319000 in 3 of 6 months, totalling 8,301 kg at an assessable value of BDT 1,642,964. That is an average of BDT 198 per kilogram — useful as a rough check on whether a declared value looks plausible. In May 2026 it was the 2,932nd largest of 4,066 tariff lines by assessable value.
| Month | Net weight | Assessable value | Per kg |
|---|---|---|---|
| January 2026 | 1 kg | BDT 627 | BDT 627 |
| March 2026 | 8,000 kg | BDT 1,201,596 | BDT 150 |
| May 2026 | 300 kg | BDT 440,741 | BDT 1,469 |
Bonded imports. A further 91,564 kg worth BDT 34,992,967 entered under the bonded-warehouse regime in the same period — goods brought in duty-free as inputs on the undertaking that they leave again as exports, which in Bangladesh overwhelmingly means ready-made garments. That is 95.5% of everything imported under this code. In practice this line is an export input rather than a product entering the domestic market, so the duty rates above apply to only a small fraction of the trade.
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.
Source: NBR Operative Tariff 2026-2027. The full schedule was reconciled against NBR's online duty calculator before publication; figures were last checked against NBR's live operative tariff search on 10 October 2026.
How this line compares
Chapter 28 contains 200 tariff lines, averaging 38.13%. At 33.63%, 28319000 sits below that average by 4.5 percentage points. It is the 126th most heavily taxed line in the chapter.
Across the whole Operative Tariff the mean is 61.08%, so this line is cheaper than the typical import by 27.45 points.
No supplementary duty applies here, which is the normal case — SD is zero on 78% of the tariff. Where it does apply it usually dominates every other component.