Potassium Graham's Salt (Metaphosphate) from Japan
Potassium Graham's salt, a vitreous potassium metaphosphate, used as a water softener in dishwashing detergents. Falls under HTS 2835.39.10.00 as other polyphosphates of potassium. Vitreous form provides long-chain phosphate structure.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Historical name 'Graham's salt' requires chemical synonym on invoice
• Test for vitreous vs soluble form affecting end-use declaration
• Monitor EU phosphate discharge regulations impacting market access