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HSChapter 35
U.S. imports of rennet & rennet concentrates (HS 350710) totaled $908K in April 2026, traded with 12 countries.
Importers of Rennet & Rennet Concentrates paid $78K in duties in April 2026 — an effective duty rate of 8.6% on $908K in dutiable value, based on actual customs collections rather than the published tariff schedule. Rennet & Rennet Concentrates imports of $908K in April 2026 ran 21% below the year-to-date monthly average of $1.1M.
Last updated: April 2026 dataRennet — the enzyme complex used to coagulate milk in cheese production — is a narrowly traded but commercially critical input for dairy processors, and the entire heading resolves to a single 10-digit line (3507100000). Denmark and Italy dominate global rennet supply, reflecting the concentration of industrial enzyme and dairy-culture manufacturing in those countries. Because rennet is used as a food-processing aid, FDA oversight applies to imported product, and foreign manufacturers must be registered under applicable food facility registration requirements. Importers should also distinguish animal-derived rennet from microbial or fermentation-produced chymosin, as the latter may be classified elsewhere.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Traditional animal rennet extracted from calf stomachs falls squarely within 3507.10. Fermentation-produced chymosin (FPC) — the dominant commercial form today — is also classified here when presented as a rennet or rennet concentrate, but importers should confirm with CBP if the product is a highly purified enzyme preparation, as some formulations may be classified under 3507.90 depending on their composition and presentation.
Rennet imported as a food-processing enzyme must come from a facility registered with FDA under the Bioterrorism Act food facility registration program. Prior Notice of importation is required for food-contact enzyme preparations. Importers should also ensure the product complies with FDA's GRAS (Generally Recognized as Safe) status or has an applicable food additive authorization for its intended use in cheese manufacturing.
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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 |
|---|---|---|---|---|
| 3507100000 | RENNET AND CONCENTRATES THEREOF | $908K | 8.64% | $78K |
RENNET AND CONCENTRATES THEREOF
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3507100000 | RENNET AND CONCENTRATES THEREOF | $999K |
RENNET AND CONCENTRATES THEREOF
40.0K kg
ENZYMES AND PREPARED ENZYMES, NESOI
HS 350790
PEPTONES, OTHER PROTEINS & DERIV ETC; HIDE POWDER
HS 350400
ADHESIVES BASED ON RUBBER,POLMR OF HD3901-3913,NES
HS 350691
DEXTRINS AND OTHER MODIFIED STARCHES
HS 350510
GELATIN & DERIV; ISINGLASS; GLUES, ANIMAL OR NESOI
HS 350300
MILK ALBUMIN,INC CONCEN OF 2 OR MORE WHEY PROTEINS
HS 350220
| State | Imports | Exports | Balance |
|---|---|---|---|
| Wisconsin | $765K | $271K | -$494K |
| Kansas | -- | $668K | +$668K |
| Massachusetts | $123K | -- | -$123K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHICAGO, IL | $765K | -- | -$765K |
| LAREDO, TX | -- | $668K | +$668K |
| PORT HURON, MI | -- | $216K | +$216K |