HS Code for Calcium hypophosphite
Calcium hypophosphite is classified under HS code 2835.10, which specifically covers phosphinates (hypophosphites) and phosphonates (phosphites). This classification is part of Chapter 28, which deals with inorganic chemicals. Heading 2835 is structured to include phosphinates, phosphonates, phosphates, and polyphosphates. Calcium hypophosphite, with the chemical formula Ca(H2PO2)2, is the calcium salt of hypophosphorous acid. Under the Harmonized System, the first subheading (2835.10) is dedicated to the salts of phosphinic and phosphonic acids. Since calcium hypophosphite is a phosphinate, it is accurately placed here. The classification is determined by the chemical structure of the anion; hypophosphites contain phosphorus in a lower oxidation state compared to phosphates. To qualify for this code, the substance must be a separate chemically defined compound. It is widely used as a flame retardant in polymers and as a nutritional supplement in animal feed, but its chemical identity as a phosphinate remains the primary driver for its 2835.10 classification.
Products Included
- Calcium hypophosphite technical grade
- Calcium hypophosphite pharmaceutical grade
- Calcium hypophosphite used as a flame retardant additive
- Calcium hypophosphite for animal nutrition
Common Misclassification
The most common misclassification for this product is under HS code 2835.26, which covers phosphates of calcium. While both contain calcium and phosphorus, phosphates (2835.26) are salts of phosphoric acid, whereas hypophosphites (2835.10) are salts of phosphinic acid. Another potential error is 2835.29, which is a residual category for other phosphates. It is critical to identify the oxidation state of the phosphorus to distinguish between these subheadings.
FAQ
What is the HS code for calcium hypophosphite?
The HS code for calcium hypophosphite is 2835.10, covering phosphinates and phosphonates.
Can calcium hypophosphite be classified in Chapter 29?
No, because calcium hypophosphite is an inorganic salt, it is excluded from Chapter 29 (organic chemicals) and must be classified in Chapter 28.
Industry
Frequently Asked Questions
What is the HS code for Calcium hypophosphite?
The HS code for Calcium hypophosphite is 283510 (Phosphinates (hypophosphites) and phosphonates (phosphites), whether or not chemically defined).
How do I classify Calcium hypophosphite for customs?
Calcium hypophosphite is classified under HS code 283510 — Phosphinates (hypophosphites) and phosphonates (phosphites), whether or not chemically defined. This is a 6-digit subheading level code.
Is the HS code for Calcium hypophosphite the same in all countries?
The base HS code 283510 for Calcium hypophosphite is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.