HS Code 28331100
Disodium Sulphate
Worked example
On an assessable value of BDT 100,000, the total duty and taxes payable on 28331100 would be approximately BDT 96,100.00, because the Total Tax Incidence is 96.1% of the assessable value.
What these figures mean
Disodium Sulphate is classified under HS code 28331100, which sits in heading 2833 (Sulphates; alums; peroxosulphates (persulphates)) 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 25%, Supplementary Duty of 20%, VAT of 15%, Advance Income Tax of 5%, Regulatory Duty of 5% and Advance Tax of 7.5%. Combined, these produce a Total Tax Incidence of 96.1%, 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 28331100 in 6 of 6 months, totalling 80,448,726 kg at an assessable value of BDT 1,240,518,544. That is an average of BDT 15 per kilogram — useful as a rough check on whether a declared value looks plausible. In May 2026 it was the 259th largest of 4,066 tariff lines by assessable value.
| Month | Net weight | Assessable value | Per kg |
|---|---|---|---|
| December 2025 | 14,001,500 kg | BDT 235,632,598 | BDT 17 |
| January 2026 | 7,524,250 kg | BDT 133,326,420 | BDT 18 |
| February 2026 | 7,954,001 kg | BDT 132,672,722 | BDT 17 |
| March 2026 | 15,530,024 kg | BDT 272,113,476 | BDT 18 |
| April 2026 | 20,753,801 kg | BDT 262,286,693 | BDT 13 |
| May 2026 | 14,685,150 kg | BDT 204,486,635 | BDT 14 |
Bonded imports. A further 232,996,970 kg worth BDT 3,651,218,019 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 74.6% 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 96.1%, 28331100 sits above that average by 57.97 percentage points. It is the 1st most heavily taxed line in the chapter.
Across the whole Operative Tariff the mean is 61.08%, so this line is dearer than the typical import by 35.02 points.
Within heading 2833 alone, rates run from 9.5% to 96.1% across 12 lines. Classification inside a single heading can change the bill substantially, so confirm the eight-digit code rather than working from the four-digit heading.
This line carries supplementary duty of 20%. Only 1,633 of 7,469 lines carry any SD at all, and because it is charged after customs and regulatory duty, and VAT is then charged on top of it, it affects the total far more than the rate alone suggests.