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HSChapter 25
U.S. imports of kaolin and other kaolinic clays (including calcined) (HS 250700) totaled $492K in April 2026, traded with 17 countries.
Importers of Kaolin and Other Kaolinic Clays (Including Calcined) paid $43K in duties in April 2026 — an effective duty rate of 9.8% on $437K in dutiable value, based on actual customs collections rather than the published tariff schedule. Kaolin and Other Kaolinic Clays (Including Calcined) imports of $492K in April 2026 ran 20% below the year-to-date monthly average of $617K.
Last updated: April 2026 dataKaolin — also widely traded as china clay — is classified under a single 10-digit line (2507000000) whether raw or calcined, with calcination producing metakaolin used in cement and ceramics. The United Kingdom and Brazil are the leading US import sources, reflecting the globally significant deposits in Cornwall and the Brazilian state of Pará. Kaolin's primary commercial roles span paper coating and filling, ceramics, paint extenders, and rubber compounding, with calcined grades commanding premium pricing for their enhanced brightness and reactivity.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
No. Both raw and calcined kaolin — including metakaolin — are classified under 2507000000. The calcination process does not move the product to a different heading, though it significantly affects the commercial grade, brightness specification, and end-use suitability, all of which should be documented in the commercial invoice.
Brightness (ISO or GE scale), particle size distribution (d50 and d90), viscosity, and moisture content are the standard commercial specifications. For paper-coating grades, brightness above 90 ISO is typically required. Calcined grades are additionally characterized by their surface area and reactivity, which matter for cement and refractory applications.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2507000000 | KAOLIN AND OTHER KAOLINIC CLAYS, WH/NOT CALCINED | $492K | 9.84% | $43K |
KAOLIN AND OTHER KAOLINIC CLAYS, WH/NOT CALCINED
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2507000000 | KAOLIN AND OTHER KAOLINIC CLAYS, WH/NOT CALCINED | $51.5M |
KAOLIN AND OTHER KAOLINIC CLAYS, WH/NOT CALCINED
135.0K t
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Georgia | $14K | $45.0M | +$45.0M |
| South Carolina | -- | $2.2M | +$2.2M |
| Tennessee | $2K | $1.0M | +$1.0M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $14K | $42.3M | +$42.3M |
| LAREDO, TX | $2K | $3.6M | +$3.6M |
| EAGLE PASS, TX | -- | $1.7M | +$1.7M |