Potassium sodium tartrate (Rochelle salts)
Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives: > Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: > Salts and esters of tartaric acid: > Potassium sodium tartrate (Rochelle salts)
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2918.13.30.00
Potassium Sodium Tartrate Crystals (Rochelle Salt)
Pure potassium sodium tartrate, also known as Rochelle salt, is a double salt of tartaric acid with potassium and sodium. It falls under HTS 2918.13.3000 as a salt of tartaric acid with alcohol function but without other oxygen functions, meeting Chapter 29 requirements for chemically defined organic compounds. Commonly supplied as white crystalline powder for laboratory and industrial applications.
Rochelle Salt for Piezoelectric Crystals
Specialty potassium sodium tartrate grown into large single crystals for piezoelectric applications in early microphones and transducers. Falls precisely under HTS 2918.13.3000 as the named Rochelle salt, a tartaric acid salt with defined chemical structure per Chapter 29.
Technical Grade Rochelle Salt Powder
Industrial-grade potassium sodium tartrate (min 98% purity) for electroplating baths and metal cleaning applications. HTS 2918.13.3000 specifically names this compound as a tartaric acid salt, qualifying under Chapter 29 for separate chemically defined organic compounds.
Stabilized Rochelle Salt with Anti-Caking Agent
Potassium sodium tartrate with food-grade anti-caking stabilizer added for preservation during transport. Qualifies under HTS 2918.13.3000 and Chapter 29 note (f) as the defined compound with stabilizer necessary for transport. Maintains free-flowing properties in humid conditions.
Rochelle Salt for Silvering Mirrors
High-purity potassium sodium tartrate used in traditional mirror silvering solutions as reducing agent. Specifically named under HTS 2918.13.3000 as Rochelle salts, the double tartrate essential for depositing silver films. Supplied in moisture-proof containers.
Bulk Rochelle Salt Dihydrate USP
Pharmaceutical bulk potassium sodium tartrate tetrahydrate (dihydrate formula KNaC4H4O6·4H2O) meeting USP monograph. Classifies under HTS 2918.13.3000 as the specifically named Rochelle salt of tartaric acid. Used in bulk for tablet compression and syrup formulation.
Rochelle Salt Pharmaceutical Grade
High-purity potassium sodium tartrate meeting USP standards for use in pharmaceutical formulations and as a sequestrant. Classified under HTS 2918.13.3000 as the specific salt of tartaric acid per the tariff description. Its dihydrate crystal structure provides mild laxative and buffering properties in medicinal products.
Rochelle Salt Food Grade Sequestrant
FCC-grade potassium sodium tartrate approved as GRAS for use in canned foods and beverages as a sequestrant. Precisely matches HTS 2918.13.3000 description for this specific tartaric acid double salt. Prevents metal ion precipitation and discoloration in food processing.