Anhydrous Sodium Dichromate
Anhydrous sodium dichromate (Na2Cr2O7) is the water-free crystalline form, highly soluble and used in organic synthesis and pigment manufacturing. Classified under HTS 2841.30.00.00 as it is the pure sodium salt of dichromic acid, an oxometallic acid per Chapter 28 definitions.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in aqueous solution exceeding 30% concentration
Chromium trioxide in solution classifies under 2819, and impure dichromate solutions may follow if not solid salts.
If for complex dichromates or double salts with other metals
Chapter notes specify double salts go to 2842, distinguishing from simple sodium dichromate.
If used as luminophore or pigment base
Chapter exclusions send inorganic luminophores to 3206, applicable if sodium dichromate is prepared for such use.
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Import Tips & Compliance
• Provide assay reports confirming anhydrous state (>99% purity) to avoid misclassification as dihydrate; comply with TSCA registration for chemical imports; label as toxic/oxidizer per DOT regulations
Related Products under HTS 2841.30.00.00
Sodium Dichromate Dihydrate
Sodium dichromate dihydrate (Na2Cr2O7·2H2O) is the hydrated form of sodium dichromate, a bright orange crystalline powder used primarily in chromium plating and leather tanning. It falls under HTS 2841.30.00.00 as a salt of an oxometallic acid, specifically the dichromate of sodium, meeting the chemical definition for classification in Chapter 28.
Technical Grade Sodium Dichromate
Technical grade sodium dichromate is an industrial-grade powder (typically 98-99% purity) for wood preservation and metal surface treatment. It is classified in HTS 2841.30.00.00 as a chemically defined sodium salt of oxometallic acid, excluding organo-inorganic or excluded preparations.
Laboratory Grade Sodium Dichromate
High-purity laboratory grade sodium dichromate (>99.5%) supplied in small quantities for analytical chemistry and oxidation reactions. Falls under HTS 2841.30.00.00 as a chemically defined inorganic salt per subheading note definitions.
Sodium Dichromate Flakes
Sodium dichromate in flake form for easier handling in industrial dyeing processes, chemically identical to powder but processed for solubility. Classified under HTS 2841.30.00.00 as the form does not change its chemical definition as a sodium oxometallate salt.
Purified Sodium Dichromate Crystals
Purified crystals of sodium dichromate for pharmaceutical precursor synthesis, with impurities below 0.1%. HTS 2841.30.00.00 applies as a pure, chemically defined salt of peroxometallic acid, excluded from organo-inorganic categories.