U.S. imports of Sodium Tripolyphosphate (Sodium Triphosphate) (HS 283531) totaled $4.9M in August 2026, imported from 15 countries.
Importers of Sodium Tripolyphosphate (Sodium Triphosphate) paid $395K in duties in August 2026, an average duty rate of 8.03% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Sodium Tripolyphosphate (Sodium Triphosphate) imports of $4.9M in August 2026 ran 18% below the year-to-date monthly average of $6.0M.
Last updated: August 2026 dataSodium tripolyphosphate (STPP) is a high-volume industrial chemical used primarily as a builder in detergents, a moisture-retention agent in seafood and meat processing, and a dispersant in ceramics — making it one of the more commercially versatile phosphate salts in trade. Canada leads US import supply under this heading, with Belgium and China also significant sources. Imports from China may be subject to Section 301 tariff measures, a factor that has influenced sourcing decisions toward Canadian and European suppliers. Food-contact and food-processing applications are subject to FDA admissibility review; consult a licensed customs broker or FDA-registered agent regarding grade-specific compliance requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
116 import shipments a month
STPP is applied to shrimp, scallops, and other seafood to retain moisture during freezing and thawing. When imported as a food-processing ingredient, it is subject to FDA review as a food additive. Importers should ensure the product meets FDA purity specifications and that the intended food-contact use is clearly declared on entry documentation. Classification and admissibility are complex; consult a licensed customs broker or FDA-registered agent before shipment.
Chinese-origin STPP is subject to Section 301 tariffs, which has made Canadian and Belgian supply more cost-competitive for US buyers. Canada's proximity and established chemical production capacity have reinforced its position as the leading supplier. Importers should verify the current Section 301 status and applicable duty treatment for their specific product with a licensed customs broker, as rates and product coverage can change.
Subheading 3 of 8 in heading 2835
Subheading 283531 · $4.9M of $38.7M
ImportsExports
Imports
$4.9MYoY · free account
Exports
$1.0MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $72.4M of Sodium Tripolyphosphate (Sodium Triphosphate) and exported $10.8M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2835310000 | Sodium Triphosphates (Sodium Tripolyphosphate) | $4.9M | 8.03% | 52.06% | $395K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2835310000 | Sodium Triphosphates (Sodium Tripolyphosphate) | $1.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
Canada and Belgium together supply 76% of it. China pays 38.4% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
47.9% enters free of duty; duty collected equals 8.03% of imports for consumption.
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