Chromium(III) Sulfate Pentahydrate
Chromium(III) sulfate pentahydrate is an inorganic salt consisting of chromium cations and sulfate anions, typically appearing as a blue-green crystalline powder. It falls under HTS 2833.29.40.00 as a sulfate of chromium, chemically defined per Chapter 28 notes. Used in chrome plating, leather tanning, and as a catalyst in organic synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing fluorine or complexed with organic ligands
Fluoride or oxyhalide complexes of chromium shift to Chapter 28 heading 2829, per subchapter exclusions.
If sold as a double salt with another metal
Double or complex salts of metals fall under 2842 per Chapter Note 6, not simple sulfates.
If impure or prepared with organic additives for specific industrial use
Mixtures not chemically defined are classified as chemical preparations in 3824, excluding pure compounds of 2833.
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Import Tips & Compliance
• Verify chemical purity and provide assay certificates to confirm it meets 'chemically defined' criteria under Chapter 28 Note 1
• Include Safety Data Sheets (SDS) and CAS number (10042-45-2) in documentation for customs clearance
• Avoid common pitfalls like classifying as a mixture if stabilizers exceed 5%; test for homogeneity
Related Products under HTS 2833.29.40.00
Chromic Sulfate Anhydrous
Anhydrous chromic sulfate (Cr2(SO4)3) is used in pyrotechnics and high-temperature ceramics. It is a pure inorganic chromium sulfate under HTS 2833.29.40.00, distinguished by lack of crystal water. Dark green powder form.
Potassium Chromium Sulfate
Used in chrome tanning and mordant dyeing, this salt provides trivalent chromium fixation. HTS 2833.29.40.00 covers it as chromium sulfate, chemically defined inorganic compound. Supplied as hydrated violet crystals.
Chromium(VI) Sulfate
Chromium(VI) sulfate, or chromic acid sulfate, is a strong oxidizing agent used in chromium electroplating and corrosion inhibitors. It is classified as a sulfate of chromium under HTS 2833.29.40.00, meeting chemically defined inorganic compound standards. Typically handled as a hazardous dark red solution or solid.
Basic Chromium Sulfate
Basic chromium sulfate, often with formula Cr(OH)SO4, is a partially hydrolyzed chromium salt used primarily in leather tanning processes. Classified under HTS 2833.29.40.00 as a sulfate of chromium, it meets inorganic compound definitions in Chapter 28. Its green powder form distinguishes it from fully neutralized chromic sulfate.
Chromium Potassium Sulfate Dodecahydrate
This double salt, KCr(SO4)2·12H2O, is a chrome alum used in analytical chemistry and trivalent chromium plating baths. It qualifies under HTS 2833.29.40.00 as a sulfate of chromium, though borderline with 2842 for complex salts. Its violet crystals are standard in lab reagents.
Sodium Chromium Sulfate
Sodium chromium sulfate is a mixed metal sulfate used in green pigment manufacturing and water treatment. It falls under HTS 2833.29.40.00 as 'sulfates of chromium,' chemically defined without organic content. Supplied as olive-green crystals for industrial applications.