Sodium Sulfate Decahydrate (Glauber's Salt)
Disodium sulfate decahydrate (Na2SO4·10H2O), known as Glauber's salt, a hydrated form chemically defined under Chapter 28. Falls under HTS 2833.11.50 as 'other' disodium sulfate for thermal energy storage and lab applications.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If natural hydrated mineral extract
Natural disodium sulfate salts like mirabilite classify separately from synthetic.
If stabilized with urea for peroxide applications
Urea-hydrogen peroxide complexes move to peroxides in 2847 per Chapter notes.
If used in pigments or paints
Synthetic organic tanning substances or pigment preparations shift to Chapter 32.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide lab assay confirming 10H2O hydration to distinguish from anhydrous form
• Check for REACH compliance if destined for EU markets post-import
• Label as hazardous if shipped in bulk to prevent moisture absorption issues
Related Products under HTS 2833.11.50
Anhydrous Sodium Sulfate
Pure disodium sulfate (Na2SO4) in anhydrous form, a chemically defined inorganic salt used in industrial processes. Classified under HTS 2833.11.50 as 'other' disodium sulfate, excluding crude or refined natural forms. Essential for glass manufacturing and detergent production.
Technical Grade Sodium Sulfate
High-purity synthetic disodium sulfate for industrial detergents and paper pulping. HTS 2833.11.50 covers this 'other' category of chemically defined sodium sulfates.
Pharmaceutical Grade Sodium Sulfate
USP-grade disodium sulfate anhydrous for use in laxative formulations and IV solutions. Strictly chemically defined, classified in HTS 2833.11.50 as other disodium sulfate.
Glass Manufacturing Sodium Sulfate
Calcined synthetic Na2SO4 flux for flat glass production, reducing melting point. HTS 2833.11.50 for other disodium sulfates meeting Chapter 28 purity standards.
Textile Dyeing Sodium Sulfate
Fine crystal Na2SO4 used as leveling agent in reactive dye baths for cotton fabrics. Chemically defined sulfate for HTS 2833.11.50.
Paper Pulping Sodium Sulfate
Recovered synthetic Na2SO4 from kraft process makeup, pure disodium sulfate. Classifies in HTS 2833.11.50 as other non-natural form.