Ship & Customs · HS Chapter 31
HS codes, chapter 31.
The 4 four-digit headings of Harmonized System chapter 31, 3102 to 3105, as published in the US Harmonized Tariff Schedule. Each heading opens the free lookup with its ten-digit statistical lines, the Schedule B export numbers that share its first six digits, and the general duty rate on every line.
Catalog snapshot: August 23, 2026. Source: USITC Harmonized Tariff Schedule headings in the RevAddress tariff catalog.
| Heading | Covers |
|---|---|
| 3102 | Mineral or chemical fertilizers, nitrogenous |
| 3103 | Mineral or chemical fertilizers, phosphatic |
| 3104 | Mineral or chemical fertilizers, potassic |
| 3105 | Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg |
A four-digit heading is the family; customs forms want the full code. USPS customs forms take the ten-digit HTS number on outbound mail, and export filings take the Schedule B number. Open a heading in the lookupto pick the exact line, or search by what the product is in plain words.
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The lookup is free with no daily cap. A whole catalog is one file: upload it and every SKU comes back with its HS heading, the ten-digit candidates, and the duty path, from $47.
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