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HSChapter 35
U.S. imports of casein (HS 350110) totaled $19.4M in July 2026, traded with 14 countries.
Importers of Casein paid $1.7M in duties in July 2026 — an effective duty rate of 9.8% on $17.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataNew Zealand and Ireland are the primary sources of US casein imports, reflecting the competitive advantage of large-scale dairy processing industries in both countries. The US tariff schedule subdivides this heading into milk protein concentrate (3501101000) and other casein excluding milk protein concentrate (3501105000), a distinction that matters for both duty treatment and end-use applications in food manufacturing, adhesives, and plastics. Casein and milk protein concentrates entering as food ingredients are subject to FDA oversight, and shipments must comply with applicable food safety standards under the Food Safety Modernization Act (FSMA). Importers should also be aware that tariff-rate quota provisions may apply to certain dairy-derived proteins, affecting landed cost calculations above quota thresholds.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
80 shipments/mo
The US schedule assigns milk protein concentrate its own 10-digit line (3501101000), separate from other casein (3501105000). MPCs are co-precipitates of casein and whey proteins, while standard casein is predominantly the casein fraction alone. The distinction affects both duty treatment and potential TRQ applicability, so accurate compositional documentation from the supplier is essential.
Casein and milk protein concentrates used as food ingredients must comply with FDA's FSMA requirements, including prior notice of importation and supplier verification under the Foreign Supplier Verification Program (FSVP). The importing facility must have an FSVP in place, and the product must meet applicable food safety standards. Admissibility is complex; consult a licensed customs broker or regulatory counsel.
Subheading 1 of 2 in heading 3501
Subheading 350110 · $19.4M of $38.4M
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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 |
|---|---|---|---|---|---|
| 3501105000 | Casein, Except of Milk Protein Concentrate, NESOI | $13.1M | 9.06% | 86.95% | $1.2M |
| 3501101000 | Milk Protein Concentrate | $6.3M | 8.84% | 100.00% | $559K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3501100000 | Casein | $3.5M |
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
$19.4MYoY · Pro
Exports
$3.5MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Ireland and New Zealand together supply 61% of it.
customs district
destination
entry
rate provision · imports
8.8% enters free of duty; the effective duty rate is 8.99%.