Sodium Tripolyphosphate Hexahydrate Crystals
STPP hexahydrate in crystalline form serves as a buffering agent and emulsifier in meat processing and canned seafood. It is sodium triphosphate (Na5P3O10·6H2O), directly matching HTS 2835.31.00.00 for polyphosphates. The hydrate form is chemically defined under Chapter 28 notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other metal polyphosphates like potassium tripolyphosphate
Polyphosphates of metals other than sodium are under 2835.39, specific to non-sodium variants.
If prepared as anti-caking or conditioning agents for food
Formulated preparations put up for retail food use fall under 3824 per chapter exclusions.
If in mineral fertilizer superphosphate blends
Phosphatic fertilizers containing polyphosphates are excluded to Chapter 31 by notes.
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Import Tips & Compliance
• Include water content analysis (typically 43-49%) in COA to distinguish from anhydrous for accurate duty assessment
• For food use, comply with EU REACH if transshipping; US importers need GRAS affirmation
Related Products under HTS 2835.31.00.00
Sodium Tripolyphosphate for Water Treatment
STPP for boiler water treatment sequesters scale-forming ions to prevent corrosion. It is chemically defined sodium triphosphate under HTS 2835.31.00.00 in polyphosphates subheading.
Pharma Excipient Sodium Tripolyphosphate
High-purity STPP as excipient for tablet disintegration and controlled drug release. HTS 2835.31.00.00 as sodium polyphosphate.
STPP for Textile Processing
STPP in textile dyeing as dispersing agent for dyes and auxiliaries. Pure sodium triphosphate HTS 2835.31.00.00.
Sodium Tripolyphosphate (STPP) Food Grade Powder
Sodium tripolyphosphate (STPP) in food-grade powder form is a sodium polyphosphate used as a sequestrant, emulsifier, and moisture retainer in processed meats, seafood, and dairy products. It falls under HTS 2835.31.00.00 as it is specifically sodium triphosphate, a polyphosphate compound. This pure chemical meets the chapter's definition for chemically defined polyphosphates.
Technical Grade Sodium Tripolyphosphate Anhydrous
Anhydrous technical-grade sodium tripolyphosphate is used in detergents as a builder to soften water and enhance cleaning efficiency. Classified under HTS 2835.31.00.00 as sodium triphosphate, a polyphosphate, in its pure chemical form without added stabilizers. It meets Chapter 28 requirements for chemically defined inorganic compounds.
USP Grade Sodium Tripolyphosphate
United States Pharmacopeia (USP) grade STPP is a high-purity polyphosphate used in pharmaceutical formulations and as a pharmaceutical aid for controlled release. It qualifies under HTS 2835.31.00.00 as chemically defined sodium triphosphate. Purity exceeds pharmacopeia standards without organic admixtures.