# Chapter 35: Albuminoidal substances; modified starches; glues; enzymes

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Source: [2026 HTS Revision 20 (September 28, 2026)](https://hts.usitc.gov/reststop/exportList?from=0100&to=9999&format=JSON&styles=false). Published rates as of 2026-10-09; additional duties and eligibility rules may apply. Estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 3501: Casein, caseinates and other casein derivatives; casein glues:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3501 | Casein, caseinates and other casein derivatives; casein glues: |  |  |  |  |
| 3501.10 |   Casein: |  |  |  |  |
| 3501.10.10.00 |     Milk protein concentrate | 0.37¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 12¢/kg | kg, kg msc |
| 3501.10.50.00 |     Other | Free |  | Free | kg, kg msc |
| 3501.90 |   Other: |  |  |  |  |
| 3501.90.20.00 |     Casein glues | 6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30% | kg |
| 3501.90.60.00 |     Other | 0.37¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 12.1¢/kg | kg, kg msc |

## 3502: Albumins (including concentrates of two or more whey proteins, containing by weight more than 80 percent whey proteins, calculated on the dry matter), albuminates and other albumin derivatives:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3502 | Albumins (including concentrates of two or more whey proteins, containing by weight more than 80 percent whey proteins, calculated on the dry matter), albuminates and other albumin derivatives: |  |  |  |  |
|  |   Egg albumin: |  |  |  |  |
| 3502.11.00.00 |     Dried | 47.6¢/kg | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P, PA,PE,S,SG) | 59.5¢/kg | kg |
| 3502.19.00.00 |     Other | 9.7¢/kg | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P, PA,PE,S,SG) | 24.3¢/kg | kg |
| 3502.20.00.00 |   Milk albumin, including concentrates of two or more whey proteins | Free |  | Free | kg, kg msc |
| 3502.90.00.00 |   Other | Free |  | Free | kg |

## 3503: HTS 3503

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3503.00 | Gelatin (including gelatin in rectangular (including square) sheets, whether or not surfaceworked or colored) and gelatin derivatives; isinglass; other glues of animal origin, excluding casein glues of heading 3501: |  |  |  |  |
| 3503.00.10.00 |   Fish glue | 1.2¢/kg + 1.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 17.6¢/kg + 25% | kg |
|  |   Inedible gelatin and animal glue: |  |  |  |  |
| 3503.00.20.00 |     Valued under 88 cents per kg | 1.2¢/kg + 3.2% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P, PA,PE,S,SG) | 5.5¢/kg + 20% | kg |
| 3503.00.40.00 |     Valued 88 cents or more per kg | 2.8¢/kg + 3.8% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM, P, PA,PE,S,SG) | 15.4¢/kg + 20% | kg |
| 3503.00.55 |   Other | 2.8¢/kg + 3.8% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 20% |  |
| 3503.00.55.10 |     Edible gelatin | 2.8¢/kg + 3.8% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 20% | kg |
| 3503.00.55.20 |     Photographic gelatin | 2.8¢/kg + 3.8% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 20% | kg |
| 3503.00.55.50 |     Other | 2.8¢/kg + 3.8% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 20% | kg |

## 3504: HTS 3504

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3504.00 | Peptones and their derivatives; other protein substances and their derivatives, not elsewhere specified or included; hide powder, whether or not chromed: |  |  |  |  |
| 3504.00.10.00 |   Protein isolates | 5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | kg |
| 3504.00.50 |   Other | 4% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | kg |
|  |     From peas: | 4% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.5% |  |
| 3504.00.50.10 |       Certified organic | 4% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | kg |
| 3504.00.50.50 |       Other | 4% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | kg |
| 3504.00.50.80 |     Other | 4% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | kg |

## 3505: Dextrins and other modified starches (for example, pregelatinized or esterified starches); glues based on starches, or on dextrins or other modified starches:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3505 | Dextrins and other modified starches (for example, pregelatinized or esterified starches); glues based on starches, or on dextrins or other modified starches: |  |  |  |  |
| 3505.10.00 |   Dextrins and other modified starches | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg |  |
|  |     Dextrin: | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg |  |
| 3505.10.00.15 |       Derived from potato starch | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg | kg |
| 3505.10.00.20 |       Other | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg | kg |
|  |     Other: | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg |  |
| 3505.10.00.40 |       Derived from corn (maize) starch | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg | kg |
| 3505.10.00.45 |       Derived from potato starch | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg | kg |
| 3505.10.00.92 |       Other | 0.7¢/kg | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.6¢/kg | kg |
| 3505.20.00.00 |   Glues | 2.1¢/kg + 2.9% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 17.6¢/kg + 25% | kg |

## 3506: Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3506 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg: |  |  |  |  |
| 3506.10 |   Products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg: |  |  |  |  |
| 3506.10.10.00 |     Animal glue, including casein glue, but not including fish glue | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 30.4% | kg |
| 3506.10.50.00 |     Other | 2.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | kg |
|  |   Other: |  |  |  |  |
| 3506.91 |     Adhesives based on polymers of headings 3901 to 3913 or on rubber: |  |  |  |  |
| 3506.91.10.00 |       Optically clear free-film adhesives and optically clear curable liquid adhesives of a kind used solely or principally for the manufacture of flat panel displays or touch-sensitive screen panels | Free |  | 20% | kg |
| 3506.91.50.00 |       Other | 2.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | kg |
| 3506.99.00.00 |     Other | 2.1% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | kg |

## 3507: Enzymes; prepared enzymes not elsewhere specified or included:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3507 | Enzymes; prepared enzymes not elsewhere specified or included: |  |  |  |  |
| 3507.10.00.00 |   Rennet and concentrates thereof | Free |  | Free | kg |
| 3507.90 |   Other: |  |  |  |  |
| 3507.90.20.00 |     Pencillin G amidase | Free |  | 25% | kg |
| 3507.90.70 |     Other | Free |  | 25% |  |
| 3507.90.70.10 |       Enzymes – proteases, amylases, lipases, cellulases, pectinases, oxidases, and catalases | Free |  | 25% | kg |
| 3507.90.70.80 |       Other | Free |  | 25% | kg |