HTS Chapter 35: Albuminoidal substances; modified starches; glues; enzymes
HTS Chapter 35 covers Albuminoidal substances; modified starches; glues; enzymes. Browse 5 published headings, then narrow to the active product line that matches the goods.
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS Chapter 35 generally covers protein-based materials and derivatives, modified starches and starch-based glues, prepared adhesives, and enzymes. Examples include casein and casein glues, albumins and albumin derivatives, dextrins, pregelatinized or chemically modified starches, retail-packed adhesive products, and prepared or unprepared enzymes. The product’s ingredients, processing, physical form, packaging, and stated use can all affect classification.
The HTS is read from broad to narrow: a chapter identifies the general product area, a heading uses four digits (such as 3505), a subheading adds more digits for a narrower product description, and the complete U.S. classification is usually a 10-digit code. To classify a Chapter 35 product, start with the heading text and legal notes, then compare the product’s exact composition and condition with the subheading descriptions and any applicable exclusions. Confirm the final code using current official HTS data; difficult cases may require a customs broker or a binding classification ruling.
What to check
- Identify the product’s principal material, chemical composition, and manufacturing process; do not classify solely by its marketing name or intended use.
- Check whether the item is a specific casein, albumin, modified starch, adhesive, or enzyme product, and review the relevant heading and subheading notes for definitions and limitations.
- Compare the product with exclusions and nearby HTS chapters, especially where the item is a food preparation, chemical product, pharmaceutical preparation, or industrial material covered elsewhere.
- For retail adhesives, verify the package form, labeling, and net weight, because the tariff descriptions may distinguish products put up for retail sale from bulk or industrial preparations.
- After selecting the base HTS code, check the current U.S. tariff schedule and any applicable Chapter 99 provisions or other additional duties; these are separate measures and must be confirmed for the product’s origin and entry date.
How to use this chapter
A chapter is the first classification level, not a duty rate. Choose the heading that describes the product, narrow by material, construction, use, or other legal distinctions, and verify the final line against the official HTS notes.
Heading list
| HTS code | Description | Linked 8-digit entries |
|---|---|---|
| 3501 | Casein, caseinates and other casein derivatives; casein glues: | 0 |
| 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: | 0 |
| 3505 | Dextrins and other modified starches (for example, pregelatinized or esterified starches); glues based on starches, or on dextrins or other modified starches: | 1 |
| 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: | 0 |
| 3507 | Enzymes; prepared enzymes not elsewhere specified or included: | 0 |
Linked measures
0 linked measure entries in the current snapshot.
Questions about HTS Chapter 35
What does HTS Chapter 35 cover?
HTS Chapter 35 covers Albuminoidal substances; modified starches; glues; enzymes. This page groups the chapter’s 4-digit headings; a shipment still needs the most specific active 8- or 10-digit line supported by the product facts.
Is HTS Chapter 35 a final product classification?
No. A chapter is a broad 2-digit category. Narrow it to the applicable heading and the most specific active statistical line before estimating duty or filing an entry.