Scope Information
Contact Information
- Enforcement and Compliance
Customs Liaison Unit (202) 482-0984
Sodium Hexametaphosphate from The People Republic of China [ A-570-908 ]
Scope Description
The merchandise subject to this order is sodium hexametaphosphate. Sodium hexametaphosphate is a water-soluble polyphosphate glass that consists of a distribution of polyphosphate chain
lengths. It is a collection of sodium polyphosphate polymers built on repeating NaPO3 units. Sodium hexametaphosphate has a P2O5 content from 60 to 71 percent. Alternate names for
sodium hexametaphosphate include the following: Calgon; Calgon S; Glassy Sodium Phosphate; Sodium Polyphosphate, Glassy; Metaphosphoric Acid; Sodium Salt; Sodium Acid Metaphosphate;
Graham’s Salt; Sodium Hex; Polyphosphoric Acid, Sodium Salt; Glass H; Hexaphos; Sodaphos; Vitrafos; and BAC-N-FOS. Sodium hexametaphosphate is typically sold as a white powder or
granule (crushed) and may also be sold in the form of sheets (glass) or as a liquid solution. It is imported under heading 2835.39.5000, HTSUS. It may also be imported as a blend or
mixture under heading 3824.90.3900, HTSUS. The American Chemical Society, Chemical Abstract Service (“CAS”) has assigned the name “Polyphosphoric Acid, Sodium Salt” to sodium
hexametaphosphate. The CAS registry number is 68915-31-1. However, sodium hexametaphosphate is commonly identified by CAS No. 10124-56-8 in the market. For purposes of this order, the
narrative description is dispositive, not the tariff heading, CAS registry number or CAS name.
The product covered by this order includes sodium hexametaphosphate in all grades, whether food grade or technical grade. The product covered by this order includes sodium
hexametaphosphate without regard to chain length i.e., whether regular or long chain. The products covered by this order include sodium hexametaphosphate without regard to physical
form, whether glass, sheet, crushed, granule, powder, fines, or other form, and whether or not in solution.
However, the product covered by this order does not include sodium hexametaphosphate when imported in a blend with other materials in which the sodium hexametaphosphate accounts for less
than 50 percent by volume of the finished product.
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