HS Code 28311000
Dithionites And Sulphoxylates Of Sodium
Worked example
On an assessable value of BDT 100,000, the total duty and taxes payable on 28311000 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 Of Sodium is classified under HS code 28311000, 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 December 2025 and May 2026, NBR recorded commercial imports under 28311000 in 6 of 6 months, totalling 2,383,885 kg at an assessable value of BDT 251,084,924. That is an average of BDT 105 per kilogram — useful as a rough check on whether a declared value looks plausible. In May 2026 it was the 756th largest of 4,066 tariff lines by assessable value.
| Month | Net weight | Assessable value | Per kg |
|---|---|---|---|
| December 2025 | 627,521 kg | BDT 57,625,944 | BDT 92 |
| January 2026 | 344,404 kg | BDT 35,080,376 | BDT 102 |
| February 2026 | 351,574 kg | BDT 53,699,112 | BDT 153 |
| March 2026 | 57,304 kg | BDT 5,902,831 | BDT 103 |
| April 2026 | 630,072 kg | BDT 54,520,331 | BDT 87 |
| May 2026 | 373,010 kg | BDT 44,256,330 | BDT 119 |
Bonded imports. A further 4,034,910 kg worth BDT 628,436,664 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. Bonded entries account for 71.5% of the total value imported under this code, the rest entering commercially.
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%, 28311000 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.