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HSChapter 35
U.S. imports of casein (HS 350110) totaled $14.8M in April 2026, traded with 11 countries.
Importers of Casein paid $1.4M in duties in April 2026 — an effective duty rate of 9.7% on $14.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Casein imports of $14.8M in April 2026 ran 14% below the year-to-date monthly average of $17.2M.
Last updated: April 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.
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.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| IRELAND | $4.3M | $62K | -$4.2M |
| FRANCE | $4.0M | -- | -$4.0M |
| NEW ZEALAND | $4.0M | -- | -$4.0M |
| CANADA | -- | $1.6M | +$1.6M |
| JAPAN | -- | $1.0M | +$1.0M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3501105000 | CASEIN, EXCEPT OF MILK PROTEIN CONCENTRATE, NESOI | $12.5M | 9.64% | $1.2M |
| 3501101000 | MILK PROTEIN CONCENTRATE | $2.3M | 9.79% | $220K |
CASEIN, EXCEPT OF MILK PROTEIN CONCENTRATE, NESOI
MILK PROTEIN CONCENTRATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3501100000 | CASEIN | $3.3M |
CASEIN
310.9K 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $5.7M | -- | -$5.7M |
| PHILADELPHIA, PA | $4.7M | -- | -$4.7M |
| NORFOLK-NEWPORT NEWS, VA | $3.2M | -- | -$3.2M |