Analysis
HTS 2815.20.00 covers potassium hydroxide (Caustic potash) under heading 2815 (sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of…). US Customs collects import statistics for it under 2 ten-digit suffixes, reported in kilograms.
Within this group the rate runs from duty-free to 3.7%. Compared with 2815.30.00 (peroxides of sodium or potassium), which pays 3.7%, a misclassification either way moves the duty by 3.7 percentage points.
For statistics it divides in two: 2815.20.00.50 for in solid form and 2815.20.00.90 for other. Both pay the same duty; the suffix records which kind was imported.
The normal trade relations rate here is zero, shared by about 29% of the 274 tariff lines in chapter 28, a useful check when a neighbouring dutiable line is a candidate. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
The other lines in the same group are 2815.11.00 (sodium hydroxide (Caustic soda): solid, duty-free), 2815.12.00 (in aqueous solution (Soda lye or liquid soda), duty-free) and 2815.30.00 (peroxides of sodium or potassium, 3.7%).
Statistical suffixes
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2815.11.00 | Sodium hydroxide (Caustic soda): solid | Free |
| 2815.12.00 | In aqueous solution (Soda lye or liquid soda) | Free |
| 2815.30.00 | Peroxides of sodium or potassium | 3.7% |