Phosphoric esters and their salts — HTS 2919
Phosphoric esters and their salts, including lactophosphates; their halogenated, sulfonated, nitrated or nitrosated derivatives
Chapter 29 › Heading 2919
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 heading 2919 is a broad product category for phosphoric esters and their salts, including lactophosphates. It also covers certain derivatives of those compounds when they are halogenated, sulfonated, nitrated, or nitrosated. In plain language, these are chemical substances made by combining phosphoric acid-related structures with organic materials or by modifying them through specified chemical treatments.
The 4-digit heading is only the starting point. To reach the correct 8-digit HTSUS code, review the product’s exact chemical identity and follow the more detailed subheadings and statistical provisions under heading 2919. Classification may depend on the compound’s material or chemical type, whether it is a salt or ester, the particular derivative, and sometimes its composition or presentation. A customs broker or qualified chemical-classification specialist may be needed for complex products.
What to check
- Obtain the full chemical name, structural formula, CAS Registry Number, and safety data sheet; do not classify from a trade name alone.
- Confirm whether the product is a phosphoric ester, a salt, a lactophosphate, or a halogenated, sulfonated, nitrated, or nitrosated derivative.
- Check the HTSUS subheadings and 8-digit statistical provisions for the product’s specific chemical type, composition, and any stated distinctions.
- Verify whether the shipment is a pure compound, mixture, preparation, or solution, because headings outside Chapter 29 may apply in some cases.
- Compare the proposed code with CBP classification guidance or obtain a binding ruling or broker review when the chemical structure or product composition is uncertain.
HTS heading 2919 summary
Phosphoric esters and their salts is a 4-digit product category containing 1 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 2919.90 | Other |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 2919.10.00.00 👉 | Tris(2,3-dibromopropyl phosphate) | 3.7% | Free | 25% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2919?
Phosphoric esters and their salts, including lactophosphates; their halogenated, sulfonated, nitrated or nitrosated derivatives. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.