HTS 3504.00.10Peptones and their derivatives; other protein substances and their derivatives, not elsewhere specified or included; hide powder, whether or not chromed:Protein isolates

What that translates to:Protein isolates

Also written 35040010 or 3504.00.1000. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Protein isolates (HTS 3504.00.10) from China owe 25% in total duties as of Oct 1, 2026: a 5% regular duty plus a 12.5% forced-labor tariff (Section 301) and a 7.5% China tariff (Section 301).

Total duty rate25%That's $2,500 on a $10,000 shipment.

Forced-labor tariffSection 301, since Jul 24, 202612.5%

China tariffSection 301, since Feb 14, 20207.5%

Regular dutyBase rate (MFN) in the tariff schedule5%

Total duty25%

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Modification of Section 301 Action (List 4A cut to 7.5% from Feb 14, 2020), 85 FR 3741, Jan 22, 2020; HTS 9903.88.15.

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Official description

Peptones and their derivatives; other protein substances and their derivatives, not elsewhere specified or included; hide powder, whether or not chromed: Protein isolates

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 35: Albuminoidal substances; modified starches; glues; enzymes.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

3504.00.1000 (3504001000)Protein isolates · reported in kg

What changed for this code

Sep 29, 2026Import bans on some Canadian products on the Section 338 lists take effect
Sep 15, 2026Canada Section 338 lists change, and goods under Section 232 lose their exemption
Aug 22, 2026Section 338 duties of 50% on listed Canadian products start
Jul 24, 2026Forced-labor tariffs start on imports from 60 economies (Section 301)
Jul 22, 202625% Section 301 tariff on products of Brazil starts
Jan 1, 2026Section 301 tariff on Nicaragua starts at 0%, set to rise to 10% in 2027 and 15% in 2028

Questions about HTS 3504.00.10

What is the duty rate for HTS 3504.00.10?

The regular (column 1 general) rate printed in the tariff schedule is 5%. Goods from China owe 25% in total as of Oct 1, 2026, including any additional tariffs. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 3504.00.10 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 3504.00.10 subject to Section 232 tariffs?

No Section 232 tariff applies to HTS 3504.00.10 as of Oct 1, 2026, from any country of origin.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.