Calcined or sintered dolomite (HS 251820)
Calcined or sintered dolomite (HS 251820) has 844 U.S. import bill-of-lading shipment records between Jan 2020 and Jul 2026. The largest U.S. importer of Calcined or sintered dolomite is OCV MEXICO S DE RL DE CV, with 49 shipments, followed by LAPITEC USA INC and NOVELIS CORP. The leading supplier is JK THAI DIAMOND TOOLS CO LTD, with 120 shipments, followed by LAPITEC SPA and UNICALCE SPA. Goods originate mainly from CHINA and THAILAND, arriving primarily at NEW YORK/NEWARK AREA, NEWARK, NJ. Import volume has risen over the past 12 months versus the prior year.
Sourced from U.S. Customs bill of lading data · Updated monthly · Data through July 2026
Shipments over time (last 24 months)
Trade flow: top suppliers → U.S. importers
The strongest supplier-importer relationships for Calcined or sintered dolomite (HS 251820), by shipment volume. Hover a ribbon for details; click a name to open its profile.
The largest relationship is UNICALCE SPA → OCV MEXICO S DE RL DE CV with 49 shipments, followed by LAPITEC SPA → LAPITEC USA INC (33) and ITOCHU CERATECH CORP → NOVELIS CORP (33).
Top U.S. importers
| Importer | Shipments |
|---|---|
| OCV MEXICO S DE RL DE CV | 49 |
| LAPITEC USA INC | 33 |
| NOVELIS CORP | 32 |
| OX GROUP | 28 |
| BARTELL MORRISON USA LLC | 24 |
Top suppliers
| Supplier | Shipments |
|---|---|
| JK THAI DIAMOND TOOLS CO LTD | 120 |
| LAPITEC SPA | 63 |
| UNICALCE SPA | 49 |
| ITOCHU CERATECH CORP | 39 |
| AMES BARCELONA SINTERING SA | 24 |
Origin countries
| Country | Shipments |
|---|---|
| CHINA | 285 |
| THAILAND | 147 |
| ITALY | 94 |
| INDIA | 85 |
| JAPAN | 56 |
| REPUBLIC OF KOREA | 36 |
| SPAIN | 26 |
| GERMANY | 23 |
| TURKEY | 19 |
| VIET NAM | 19 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| NEW YORK/NEWARK AREA, NEWARK, NJ | 186 |
| LOS ANGELES, CA | 133 |
| LONG BEACH, CA | 99 |
| TACOMA, WA | 65 |
| MIAMI, FL | 62 |
| SAVANNAH, GA | 51 |
| SEATTLE, WA | 46 |
| HOUSTON, TX | 45 |
| NORFOLK, VA | 35 |
| CHARLESTON, SC | 34 |
Harmonized System classification
HS code 251820 — Calcined or sintered dolomite. The Harmonized System is the international standard for classifying traded goods; U.S. Customs records this 6-digit code on every bill of lading.
Not sure this is the right code? Search all 5,700+ subheadings with the free HS code lookup, or see which product categories are growing in our quarterly State of U.S. Imports reports.
Frequently asked questions about importing Calcined or sintered dolomite
Who imports Calcined or sintered dolomite (HS 251820)?
Based on U.S. Customs bill-of-lading records, the top U.S. importers of Calcined or sintered dolomite include OCV MEXICO S DE RL DE CV, LAPITEC USA INC, NOVELIS CORP, OX GROUP, and BARTELL MORRISON USA LLC.
Who is the largest U.S. importer of Calcined or sintered dolomite?
OCV MEXICO S DE RL DE CV is the largest U.S. importer of Calcined or sintered dolomite (HS 251820), with 49 bill-of-lading shipment records.
Who are the top suppliers of Calcined or sintered dolomite?
Leading suppliers shipping Calcined or sintered dolomite (HS 251820) to the U.S. include JK THAI DIAMOND TOOLS CO LTD, LAPITEC SPA, UNICALCE SPA, ITOCHU CERATECH CORP, and AMES BARCELONA SINTERING SA.
How many U.S. shipments of Calcined or sintered dolomite are there?
ImportDoor has 844 U.S. import shipment records under HS code 251820, spanning Jan 2020 to Jul 2026.
Where is Calcined or sintered dolomite imported from?
Calcined or sintered dolomite is imported into the U.S. primarily from CHINA, THAILAND, and ITALY.
Find Calcined or sintered dolomite importers & suppliers
Get the complete list of U.S. importers and global suppliers for HS 251820, with contact details and container-level shipment records on ImportDoor.
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