U.S. import duty lookup

Enter a 10-digit HTS line, the country of origin and the entry date to see the base rate, 301 / 232 / 201 / 338 additional duties, AD/CVD deposits, PGA flags and other requirements, with a confirmed total and a maximum.

Don't know the U.S. import tariff code? Classify a product →

3822.19.0030

Other

Diagnostic or laboratory reagents on a backing, prepared diagnostic or laboratory reagents whether or not on a backing, whether or not put up in the form of kits, other than those of heading 3006; certified reference materials: › Diagnostic or laboratory reagents on a backing, prepared diagnostic or laboratory reagents whether or not on a backing, whether or not put up in the form of kits: › Other › Containing antigens or antisera:

Origin: CN · China
Entry date: 2026-10-26
Unit: kg
Column 1 general: Free
Column 2: 25%
SPI: —
HTS revision: 2026 Rev.21
Print page: 1671

Confirmed ad valorem total

12.5%

Column 1 general rate Free + additional 12.5%

Maximum (conditional + AD/CVD deposits)

12.5%

no conditional items, no AD/CVD

AD/CVD cases

none active

What to verify next

2Checks derived from this result; each item restates a measure, case or regulatory hit shown below.

1.RegulatoryTSCA import certification + PFAS 8(a)(7): File a positive TSCA certification (complies with all TSCA rules / orders) or a negative certification (pesticides / food / drugs / cosmeti…↗
2.RegulatoryChemical Weapons Convention schedules: Schedule 1: import only from States Parties, 45-day advance notice to BIS, annual report.↗

Base rate

Column 1 / Column 2 / SPIFree

Column 1 General (MFN)Applies

Free

Basis: HTSUS 2026 Rev.21 chapters 1–97Verification: VERIFIED

Section 301 forced labor

1+12.5%

Section 301 forced-labor tariff (12.5%)9903.05.31Applies

+12.5%

China: Column 1 rate + 12.5% additional

Basis: HTSUS Ch.99 U.S. note 52; 91 FR 47318Effective: 2026-07-24CSMS / source: CSMS #69326983Verification: VERIFIED

Section 301 China

1N/A

China 301: not on any listN/A

—

8-digit subheading 3822.19.00 is not on Lists 1–4B or the four-year-review lists

Basis: HTSUS Ch.99 note 20 / 31 (2026 Rev.21)Verification: VERIFIED

PGA filing flags

FDA FD1APHIS Core AQ1Expand

FDA FD1APHIS Core AQ1

FD1 FDA data may be required 801(a)
AQ1 APHIS data may be required

may-be-required only · ACE valid to 2039-12-31

Fees

MPF 0.3464% · HMF 0.125%Expand

no entered value: rates and limits only

MPF 0.3464% (min $34.58 / max $670.86)—

HMF 0.125% (ocean only)not ocean

Period 2026-10-01 – 2027-09-30 · 91 FR 48398 (2026-07-31, Doc. 2026-15530, FY2027)

Other import requirements

Supply chain / forced labor (UFLPA · WRO · CAATSA)

Chinese origin: the UFLPA presumption is triggered through the supply chain (Xinjiang inputs / Entity List), not by country of origin; the origins with the most CBP denials are MY / VN / TH.

Not in a UFLPA priority sector, and no WRO or Finding applies to this origin. The UFLPA presumption still applies through the supply chain (Xinjiang content or listed entities).

Requirements without an ACE flag

TSCA import certification + PFAS 8(a)(7)EPA/CBPConditional

at-entry

File a positive TSCA certification (complies with all TSCA rules / orders) or a negative certification (pesticides / food / drugs / cosmetics / nuclear material) in ACE when importing chemical substances or mixtures. The EP7 flag is advisory only and the certification is the importer's responsibility. Finished articles are generally exempt unless a specific rule applies. PFAS: one-time reporting of PFAS and PFAS-containing articles imported since 2011.

2025–26: The PFAS reporting window is postponed to 2027-01-31 or 60 days after the final rule (2026-04-13); the 2025-11 proposal to exempt imported articles and ≤0.1% content is not final

Basis: 15 U.S.C. 2612; 19 CFR 12.118–.127; 40 CFR 707/705Scope: 38 (Determined by product attributes (the HTS code is only a hint))Exemptions: Articles are exempt unless a specific rule appliesCSMS / source: EPA TSCA import page; FR 2026-04-13Verification: H

Chemical Weapons Convention schedulesBISConditional

before-entry

Schedule 1: import only from States Parties, 45-day advance notice to BIS, annual report. Schedule 2: import from non-States Parties prohibited, annual report above thresholds. Schedule 3: annual report.

Basis: 15 CFR 710–722Scope: 38 (Determined by product attributes (the HTS code is only a hint))CSMS / source: eCFR 15 CFR 712/713Verification: H

General requirements (all goods) (4)

Country-of-origin marking (CBP, 19 U.S.C. 1304; 19 CFR 134): Mark the country of origin legibly and permanently in English before release. J-list articles (§134.33) may be marked on the container. Special methods (§134.43: knives, scissors, surgical / scientific instruments, pliers and vacuum bottles must be die-stamped, etched or engraved). Pipe 7304–7307, gas cylinders 7311 and manhole covers 7325 under 1304(c)–(e). Watches and clocks per chapter 91 additional U.S. note 4. Hong Kong goods marked "China" (EO 13936; the origin code stays HK). eCFR 19 CFR 134; CBP HK FAQ
Wood packaging material (ISPM 15) (APHIS/CBP, 7 CFR 319.40-3): Wood pallets / crates for all goods must be heat-treated or fumigated and bear the IPPC mark; otherwise immediate re-export and penalties eCFR 7 CFR 319.40-3
Importer Security Filing (10+2) (CBP, 19 CFR 149): File the 10 data elements 24 hours before vessel loading (5 elements for FROB / IE / T&E); violations: $5,000 liquidated damages per shipment eCFR 19 CFR 149
FTC Made in USA Labeling Rule (FTC, 16 CFR 323): Unqualified "Made in USA" claims only when all or virtually all of the product is made in the U.S.; civil penalties FTC rule; EO 14392

PGA flags: what to prepare

FDA · FOO FD1/FD2/FD3/FD4 — Food (including animal food), dietary supplements, beverages (including alcohol)

Before arrival: Foreign facility registration (FEI / registration number); designate the FSVP importer (name + DUNS); submit and confirm Prior Notice in advance (road 2 hours / air and rail 4 hours / ocean 8 hours)

At entry: FDA / FOO message set: product code, manufacturer, shipper, grower, country of production, FSVP importer DUNS, AofC codes; PN confirmation number

Disclaim: FD1 / FD3: only code A (B rejected since 2020-04-18); FD2 / FD4 cannot be disclaimed

If missing: Missing PN → refusal under 801(m) / hold at port; missing 801(a) data → entry rejected / FDA hold

2025–26: PN final rule effective 2025-10-27 (resubmit within 10 days after refusal; mail tracking number from 2026-10-01); FSMA 204 traceability compliance postponed to 2028-07-20; Supplemental Guide v2.5.13 (2025-09)

https://www.fda.gov/industry/import-basics/harmonized-tariff-schedule-and-fd-flags · Verification H

FDA · DRU FD1/FD2 — Human drugs, APIs, OTC

Before arrival: Drug establishment registration and listing (NDC), NDA / ANDA; importer FEI / DUNS

At entry: FDA / DRU message set: product code, manufacturer, FDA importer, intended-use code (required), DA / DLS / REG AofC

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / FDA hold

https://www.fda.gov/media/186046/download · Verification H

FDA · DEV FD1/FD2 — Medical devices, IVDs

Before arrival: Establishment registration and device listing; 510(k) / PMA number; initial importer registration

At entry: DEV / DFE / LST AofC required; PM# (510(k) / PMA); intended-use code

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

FDA · BIO FD1/FD2 — Vaccines, blood products, HCT/Ps, allergenics

Before arrival: BLN / STN license, establishment registration, HCT/P registration

At entry: BIO message set: BLN/STN, REG, IND, HCT/HRN AofC

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

FDA · COS FD1/FD2 — Cosmetics

Before arrival: MoCRA facility registration / product listing (FEI)

At entry: Product code, manufacturer, FDA importer, country of production

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

FDA · RAD FD1/FD2 — Radiation-emitting electronic products such as lasers, X-ray, microwave and displays

Before arrival: Product report / accession number; FDA 2877 declaration code

At entry: RA1–RA7 / RB / RC / RD AofC; product name

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

FDA · TOB FD1/FD2 — Cigarettes, e-cigarettes, cigars

Before arrival: Manufacturer registration / listing; marketing authorization (PMTA / SE) status

At entry: Product name, intended-use code; PMT / SE / EXE AofC

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

FDA · VME FD1/FD2 — Veterinary drugs, veterinary devices, medicated feed

Before arrival: NADA / ANADA, drug listing (NDC), establishment registration

At entry: VME message set: NDC, REG, VAN/VNA AofC

Disclaim: FD1: only code A; FD2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.fda.gov/media/186046/download · Verification H

APHIS · APQ AQ1/AQ2/AQX — Fruit, vegetables, cut flowers, plants for planting, seeds, wood, processed plant products

Before arrival: Import permit (PPQ 587 / 588 / 585); phytosanitary certificate from the exporting NPPO; check the APHIS Core HTS table

At entry: APHIS Core message set: commodity name (validation list), LPCO (permit / phytosanitary certificate), country of origin / harvest, intended use; documents via DIS or paper originals at the first port; no de minimis

Disclaim: AQ1: A or B; AQ2 cannot be disclaimed; AQX advisory only

If missing: AQ2 without a message set → entry rejected; incomplete → hold / emergency action notification

2025–26: Plant inspection station declaration update (CERT 2026-07-27 / PROD 2026-08-27)

https://www.aphis.usda.gov/ace/aphis-core-message-set-questions-answers · Verification H

APHIS · AVS AQ1/AQ2/AQX — Live animals, animal products, germplasm, animal-derived materials

Before arrival: VS import permit (VS 16-6A / 16-3); veterinary health certificate; quarantine reservation for live animals

At entry: APHIS Core (AVS): permit / health certificate LPCO, species; DIS upload

Disclaim: AQ1: A / B; AQ2 cannot be disclaimed

If missing: Entry rejected / hold / refusal

https://www.aphis.usda.gov/ace · Verification M

APHIS · ABS AQ1/AQ2/AQX — Veterinary biologics, diagnostic reagents, animal-derived research materials

Before arrival: CVB import permit (APHIS 2005 / 2006)

At entry: APHIS Core (ABS) + permit LPCO

Disclaim: AQ1: A / B; AQ2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.aphis.usda.gov/ace · Verification M

APHIS · AAC AQ1/AQ2/AQX — Animals covered by the Animal Welfare Act (dogs, primates, etc.)

Before arrival: AWA registration / license; canine health / rabies documents

At entry: APHIS Core (AAC) + AVS data

Disclaim: AQ1: A / B; AQ2 cannot be disclaimed

If missing: Entry rejected / hold

https://www.aphis.usda.gov/ace · Verification L

Stacking rules that apply here 3Expand

A	B	Relation	Rule	Basis
FL301	BASE	stack	Additive to Column 1; EU/TW net-of-MFN to 10%, JP/KR/CH to 12.5%	HTSUS Rev.21 note 52(a), 52(k)
FL301	FTA	note	Preference claims do not exempt, except USMCA duty-free (9903.05.93/.94) and CAFTA-DR textiles (9903.05.95)	note 52(a), (g)–(i)
FL301	CH98	note	Chapter 98 exempt except 9802.00.40/.50/.60 (value of repairs) and 9802.00.80 (value less U.S. content)	note 52(a)

Composition of the totalExpand

Column 1 general rate Free0%

Section 301 forced-labor tariff (12.5%) Applies+12.5%

Data sources and disclaimer

HTSUS 2026 Rev.21 · 2026-10-25.12Expand

Data sources

Tariff: HTSUS 2026 Rev.21
Data version: 2026-10-25.12
AD/CVD: ACE case module + ITA dashboard

Disclaimer

Compiled from the HTSUS, the Federal Register, CBP CSMS messages and ACE reports as a classification and compliance reference, not legal advice; file according to current CBP/ACE guidance.

Relation

Rule

Basis

FL301

BASE

stack

Additive to Column 1; EU/TW net-of-MFN to 10%, JP/KR/CH to 12.5%

HTSUS Rev.21 note 52(a), 52(k)

FL301

FTA

note

Preference claims do not exempt, except USMCA duty-free (9903.05.93/.94) and CAFTA-DR textiles (9903.05.95)

note 52(a), (g)–(i)

FL301

CH98

note

Chapter 98 exempt except 9802.00.40/.50/.60 (value of repairs) and 9802.00.80 (value less U.S. content)

note 52(a)