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HSChapter 38
U.S. imports of certified reference materials (HS 382290) totaled $9.4M in April 2026, traded with 39 countries.
Importers of Certified Reference Materials paid $829K in duties in April 2026 — an effective duty rate of 10% on $8.3M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCertified reference materials (CRMs) are precisely characterized substances used to calibrate analytical instruments, validate measurement methods, and ensure traceability to international metrological standards — making them indispensable in pharmaceutical quality control, environmental testing, and food-safety laboratories. Classification under heading 3822 is governed by Chapter 38 Note 2, which defines CRMs by their certification documentation rather than by chemical composition, a distinction that frequently arises in customs audits. The United Kingdom and Canada are the leading US import sources, with major national metrology institutes and accredited reference material producers in both countries. Because CRMs span an enormous range of chemical matrices, importers should retain the certificate of analysis and accreditation documentation to support the heading 3822 classification against potential reclassification into a more specific chemical heading.
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Chapter 38 Note 2 requires that a certified reference material be accompanied by a certificate stating the certified property values, measurement uncertainty, traceability to a national or international measurement standard, and the accreditation of the certifying body. Without this documentation, CBP may reclassify the product under the heading appropriate to its chemical composition. Importers should retain the original certificate of analysis and the issuing body's accreditation certificate as part of their entry records.
Yes, provided it meets the Chapter 38 Note 2 definition. However, if the CRM contains a DEA-controlled substance, an EPA-regulated chemical, or an FDA-regulated biological material, the applicable agency's import permit or authorization requirements apply independently of the customs classification. Importers should identify all regulated components and obtain the necessary permits before shipment.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| UNITED KINGDOM | $2.4M | $8.4M | +$6.0M |
| CANADA | $1.1M | $7.1M | +$6.0M |
| CHINA | $231K | $3.3M | +$3.0M |
| MEXICO | $143K | $3.0M | +$2.9M |
| GERMANY | $755K | $2.4M | +$1.6M |
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3822900000 | CERTFIED REFERENCE MATS, AS DEF IN NOTE 2, CHAP 38 | $9.4M | 10.00% | $829K |
CERTFIED REFERENCE MATS, AS DEF IN NOTE 2, CHAP 38
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3822900000 | CERTFIED REFERENCE MATS, AS DEF IN NOTE 2, CHAP 38 | $48.6M |
CERTFIED REFERENCE MATS, AS DEF IN NOTE 2, CHAP 38
205.6K kg
PRODUCTS AND RESIDUALS OF CHEMICAL INDUSTRY, NESOI
HS 382499
DIAGNOSTIC OR LABORATORY REAGENTS INCL KITS, NESOI
HS 382219
CHEM ELEM DOPED, USED IN ELECTRON, DISCS WAFERS ET
HS 381800
SUPPORTED CATALYSTS W PREC METAL/PREC MTL COMPND
HS 381512
SUPPORTED CATALYSTS, NESOI
HS 381519
ADDITIVE FOR LUB OIL CONT PETRO/BITUMINOUS MINOIL
HS 381121
| State | Imports | Exports | Balance |
|---|---|---|---|
| Pennsylvania | $390K | $8.5M | +$8.1M |
| California | $815K | $7.9M | +$7.1M |
| Massachusetts | $244K | $3.1M | +$2.9M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CLEVELAND, OH | $1.7M | $9.6M | +$7.9M |
| NEW ORLEANS, LA | $727K | $7.8M | +$7.1M |
| CHICAGO, IL | $1.6M | $3.8M | +$2.1M |