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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If carbide derivatives containing sulfate impurities
Carbides take precedence; sulfates secondary.
If catalyst preparations supported on this salt
Supported catalysts in spent or reaction forms go to 3815.
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Import Tips & Compliance
• Hygroscopic nature requires sealed packaging declarations and <0.5% moisture certification
• ATF permits needed for pyrotechnic precursors
• Avoid classifying hydrates incorrectly; specify anhydrous explicitly
Related Products under HTS 2833.29.40.00
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.
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.