United States of America HS Code

HS Code 283531: Polyphosphates : Sodium triphosphate (sodium tripolyphosphate) in United States of America

Q: Is HS code 283531 the same across all countries?

Yes — up to the 6-digit level, HS code 283531 is the same in every WCO member country. Beyond 6 digits, each country extends the code for national tariff and statistical use. United States of America extends it under HTS / HTSUS.

Q: What system does United States of America use to classify HS code 283531?

United States of America classifies products under the Harmonized Tariff Schedule of the United States (HTS / HTSUS; locally Harmonized Tariff Schedule), which extends HS codes to 10 digits. The first 6 digits align with the WCO Harmonized System, and the rest cover national tariff and statistical needs.

Q: Where can I officially look up HS code 283531 in United States of America?

The official source is https://www.cbp.gov/. For faster cross-country lookups, TradeInt's HS Code Tool consolidates classifications across all major countries in one place.

What is HS Code 283531 in United States of America

Under United States of America's Harmonized Tariff Schedule of the United States (Harmonized Tariff Schedule), HS Code 283531 is the WCO Harmonized System subheading for Polyphosphates : Sodium triphosphate (sodium tripolyphosphate). This is the most detailed internationally standardized level; United States of America extends classifications to 10 digits under its national tariff system. 283531 belongs to Section VI: Products of the chemical or allied industries, Chapter 28: Inorganic chemicals : organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes, Heading 2835: Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined.

Explore more 2026 Latest United States of America import export trade data and shipment records for HS Code Sodium Tripolyphosphate (STPP) on TradeInt global trade data platform

Classification Path of HS Code 283531 in United States of America

Section VI

Chapters (28-38) Products of the chemical or allied industries

Chapter 28

Inorganic chemicals : organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes

HS Code 2835

Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined

HS Code 283531

Polyphosphates : Sodium triphosphate (sodium tripolyphosphate)

HS Code 2835310000

Sodium triphosphate (Sodium tripolyphosphate)

United States of America Tariff Classification: Harmonized Tariff Schedule of the United States (HTS / HTSUS)

In United States of America, HS 283531 is classified under the Harmonized Tariff Schedule of the United States (Harmonized Tariff Schedule) — a 10-digit national extension of the WCO 6-digit Harmonized System.

Tariff schedule Harmonized Tariff Schedule of the United States (HTS / HTSUS)

Local name Harmonized Tariff Schedule

Digits 10

Official source https://www.cbp.gov/

You know what 283531 means. Now see 2026 latest real trade activity for Sodium Tripolyphosphate (STPP) in United States of America.

Buyers, suppliers, origin and destination countries, shipment dates, and quantities direct from customs records.

Search 2026 Latest United States of America Import Data Search 2026 Latest United States of America Export Data

Top Trading Product of HS Code 2835

Top United States of America import Product Under HS Code 2835

1 283526: Phosphates : Other phosphates of calcium $155.7M 2 283539: Polyphosphates : Other $103.9M 3 283531: Polyphosphates : Sodium triphosphate (sodium tripolyphosphate) $82.5M

Figures shown for 2025.

For more 2026 recent data, search for United States of America import trade records

Top United States of America export Product Under HS Code 2835

1 283526: Phosphates : Other phosphates of calcium $109.4M 2 283539: Polyphosphates : Other $106.7M 3 283525: Phosphates : Calcium hydrogenorthophosphate (‘dicalcium phosphate’) $36.9M

Figures shown for 2025.

For more 2026 recent data, search for United States of America export trade records

Related HS Code to United States of America Sodium Tripolyphosphate (STPP) (283531)

HS Code 2835310000

Sodium triphosphate (Sodium tripolyphosphate)

HS Code 283510

Phosphinates (hypophosphites) and phosphonates (phosphites)

HS Code 283522

Phosphates : Of mono or disodium

HS Code 283524

Phosphates : Of potassium

HS Code 283525

Phosphates : Calcium hydrogenorthophosphate (‘dicalcium phosphate’)

HS Code 283526

Phosphates : Other phosphates of calcium

HS Code 283529

Phosphates : Other

HS Code 283539

Polyphosphates : Other

Frequently Asked Questions

What is HS code 283531 in United States of America?

HS code 283531 covers Polyphosphates : Sodium triphosphate (sodium tripolyphosphate) in United States of America. It sits in Chapter 28 (Inorganic chemicals : organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes), Heading 2835 of the Harmonized System, and is classified under HTS / HTSUS.

Is HS code 283531 the same across all countries?

What system does United States of America use to classify HS code 283531?

Where can I officially look up HS code 283531 in United States of America?