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US HTS CODE | Harmonized Tariff Schedule HS code & Tariffs Search Service (2026 HTS Revision 10 (06/08/2026))
| HTS Code | 99020539 | 99020540 |
| Article Description | Tetrakis(hydroxymethyl)phosphonium chloride (CAS No. 124-64-1) (provided for in subheading 2931.90.90) | Tetrakis(hydroxymethyl)phosphonium sulfate (CAS No. 55566-30-8) (provided for in subheading 2931.90.90) |
| Quota of Quantity | -- | -- |
| Unit of Quantity | [] | [] |
| Rates of Duty (1-General) | Free | Free |
| Rates of Duty (1-Special) | No change | No change |
| Rates of Duty (2-Cuba and North Korea) | No change | No change |
| Footnotes | [{columns=[stat, units], marker=1, value=See chapter 99 statistical note 1., type=footnote}] | [{columns=[stat, units], marker=1, value=See chapter 99 statistical note 1., type=footnote}] |
| Additional Duty | -- | -- |
| Additional Duty(products of China) | -- | -- |