What does HTS Chapter 35 cover?

Chapter 35 of the U.S. Harmonized Tariff Schedule (HTSUS) covers Albuminoidal substances; modified starches; glues; enzymes. It sits within Section VI: Products of the Chemical or Allied Industries. Tandom's catalog lists all 35 10-digit statistical lines and 5 4-digit headings in this chapter.

What is the typical U.S. duty rate for Chapter 35 imports?

General (Column 1) duty rates for ad-valorem lines range from 2.1% to 6.5% (median 4%); roughly 47% of lines enter duty-free. Use the calculator linked from each code page to build a date- and origin-specific import-duty estimate, including applicable Chapter 99 layers and customs fees. Potential AD/CVD exposure is flagged separately and is not included in the estimate.

How are Section 301 and Section 232 measures represented in the HTSUS?

Section 301 and Section 232 measures are represented by Chapter 99 provisions. A catalog link between a provision and a 10-digit line is a screening flag, not a claim that the measure applies; origin, product and material facts, claims, and entry date control the result.

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 35?

AD/CVD orders are issued at the case level by the Department of Commerce against specific products from specific countries. Use the product's base HTS code to find potentially relevant AD/CVD order flags, then read the written order scope; an HTS match alone does not determine coverage.

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Section VI: Products of the Chemical or Allied Industries

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

Chapter 35 of the U.S. Harmonized Tariff Schedule covers Albuminoidal substances; modified starches; glues; enzymes and sits within Section VI: Products of the Chemical or Allied Industries.

About Chapter 35

Chapter 35 contains 35 10-digit statistical lines grouped under 5 4-digit headings. Brokers, importers, and customs counsel use these codes to declare albuminoidal substances; modified starches; glues; enzymes on entry summaries (CBP Form 7501) and to look up the published Column 1, Special, and Column 2 rate notation.

General (Column 1) duty rates for ad-valorem lines in Chapter 35 range from 2.1% to 6.5%, with a median of 4%. About 26% of the chapter's lines (9 of 35) enter duty-free under the general rate. Special-rate notation (including USMCA, KORUS, AGOA, and GSP when authorized) and Chapter 99 measures can modify these base rates for qualifying shipments.

Product-code pages link into the Tandom Tariff Calculator with the base HTS code prefilled. Chapter 99 provision pages instead show mapped base codes and send you to a dated calculator scenario, which determines whether a measure applies from the entry facts. Tandom's data refreshes daily from USITC HTSUS, CBP CSMS, the Federal Register, and the Department of Commerce — the same authoritative sources the trade community files against.

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

Code	Description	General	Column 2	Special	Units
3502.11.00.00	·Dried	47.6¢/kg	59.5¢/kg	Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P, PA,PE,S,SG)	kg
3502.19.00.00	·Other	9.7¢/kg

Code	Description	General	Column 2	Special	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%

Code	Description	General	Column 2	Special	Units
3505.10.00	Dextrins and other modified starches	0.7¢/kg	6.6¢/kg	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	—
3505.10.00.15	··Derived from potato starch

Code	Description	General	Column 2	Special	Units
3507.10.00.00	Rennet and concentrates thereof	Free	Free	—	kg
3507.90	Other:	—	—

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

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

`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:

`3503`

`3504`

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

`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:

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

Frequently asked questions

What does HTS Chapter 35 cover?

What is the typical U.S. duty rate for Chapter 35 imports?

How are Section 301 and Section 232 measures represented in the HTSUS?

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 35?

Code	Description	General	Column 2	Special	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%	20%

Code	Description	General	Column 2	Special	Units
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

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

3502Albumins (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:

3503

3504

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

3506Prepared 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:

3507Enzymes; prepared enzymes not elsewhere specified or included:

Frequently asked questions

What does HTS Chapter 35 cover?

What is the typical U.S. duty rate for Chapter 35 imports?

How are Section 301 and Section 232 measures represented in the HTSUS?

How do I screen for antidumping or countervailing duty (AD/CVD) when using Chapter 35?

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

`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:

`3503`

`3504`

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

`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:

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