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U.S. imports of rennet & rennet concentrates (HS 350710) totaled $717K in July 2026, traded with 14 countries.
Importers of Rennet & Rennet Concentrates paid $74K in duties in July 2026 — an effective duty rate of 10% on $717K in dutiable value, based on actual customs collections rather than the published tariff schedule. Rennet & Rennet Concentrates imports of $717K in July 2026 ran 38% below the year-to-date monthly average of $1.1M.
Last updated: July 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.
25 shipments/mo
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.
HSChapter 35
Subheading 2 of 2 in heading 3507
Subheading 350710 · $717K of $62.0M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3507100000 | Rennet and Concentrates Thereof | $717K | 10.29% | 100.00% | $74K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3507100000 | Rennet and Concentrates Thereof | $583K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$717KYoY · Pro
Exports
$583KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Denmark and Italy together supply 98% of it.
customs district
destination
entry
rate provision · imports
the effective duty rate is 10.29%.