2835.31.00.00
Sodium triphosphate (Sodium tripolyphosphate)
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined: Polyphosphates
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
1.4%
Column 2 (Non-NTR)
6%
Column 1 (Special / FTA)
Free
Eligible
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.90.08
35%
ActiveArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Applies to origin: RU, BY
Effective from April 5, 2025
Rate-change history
What the rate was before, and when it changed. The government schedule replaces each revision in place; we keep the timeline.
-
NEW_PROGRAM Executive Order Feb 1, 2026 — Reciprocal Tariff (FR 2026-03824)
Section 122 reciprocal surcharge in effect — additional 10% on most imports through July 24, 2026
See the change → -
Base rate HTS 2023
Column 1 general rate set to 1.4%.
Related CBP rulings
The tariff classification of Monopotassium Phosphate from Russia
You identify the subject product as Monopotassium Phosphate (potassium dihydrogen phosphate, potassium phosphate monobasic), CAS number 7778-77-0, with a chemical formula of KH2PO4. Monopotassium Phosphate is a solid inorganic compound, whi
The tariff classification of Aluminum Hypophosphite from India
In your submission, the subject product is identified as Aluminum Hypophosphite, CAS Number: 7784-22-7. Aluminum Hypophosphite is an inorganic chemical compound in white crystalline powder form.
The tariff classification of sodium hexametaphosphate from China
You have indicated that the product at issue is most commonly used as a food additive and also used in the refining process of copper wire production. Your submission states that the molecular formula for sodium hexametaphosphate is (NaPO3)
The tariff classification of various inorganic chemicals from China
Product number 545 is an inorganic compound. It will be used to treat water for corrosion and scale control.
The tariff classification of various organic and inorganic chemicals from China
Product number 646 is an inorganic compound. It will be used to treat water for corrosion and scale control.
The tariff classification of various inorganic chemicals from China
Product number 205 is an inorganic compound. It will be used to treat water for corrosion and scale control.
The tariff classification of various inorganic chemicals from China
Product number 841 is an inorganic compound. It will be used to treat water for corrosion and scale control.
The tariff classification of various inorganic chemicals from China
Product number 312 is an inorganic compound. It will be used to treat water for corrosion and scale control.
The tariff classification of Di-Tert Butyl Potassium Phosphate (CAS # 33494-80-3) from an unspecified country
You describe the item as Di-Tert Butyl Potassium Phosphate (CAS # 33494-80-3). The attached Material Safety Data Sheet, provided by Rhodia UK Limited, indicates that the product at issue will be used under strictly controlled conditions, as
The tariff classification of Lithium iron phosphate (CAS# 15365-14-7) from China.
The product is described as a powder mixture of lithium phosphate and iron phosphate used in the domestic manufacture of battery cells and systems targeted primarily for use in electric and hybrid vehicles and in various electric grid stora
The tariff classification of Tripotassium Phosphate (CAS # 7778-53-2), Monopotassium Phosphate (CAS# 7778-77-0), Magnesium Hydroxide (CAS# 1309-42-8), Xanthan Gum (X-Gum), and Fused Magnesium Oxide.
The first product is described as Tripotassium Phosphate (CAS # 7778-53-2), the second product is described as Monopotassium Phosphate (CAS# 7778-77-0), the third product is described as Magnesium Hydroxide (CAS# 1309-42-8), the fourth prod
The tariff classification and status under the United States-Israel Free Trade Agreement (IFTA), of Sodium Tripolyphosphate Food Grade M 212 Granular from Israel.
The tariff classification and status under the United States-Israel Free Trade Agreement (IFTA), of Sodium Tripolyphosphate Food Grade M 212 Granular from Israel.
Other codes in heading 2835
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 2835.31.00.00 from each major US trading partner.
Follow 2835.31.00.00
Get an email when a new CBP ruling cites this code, a ruling on it is revoked, or its tariff measures change.
One email per day at most. Confirm your address once, unsubscribe anytime.
Need to defend this classification?
Get the full 10-digit classification with GRI reasoning for your product, backed by cited CBP rulings and an audit trail for reasonable care.