Oxalic Acid Dihydrate
Oxalic acid dihydrate (C2H2O4·2H2O) is the crystalline form of oxalic acid commonly used in industrial cleaning and metal polishing. It falls under HTS 2917.11.00.00 as a separate chemically defined acyclic polycarboxylic acid. This pure compound meets chapter 29 note (a) without exclusions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contains >5% impurities or additives
Mixtures of organic chemicals not chemically defined fall under chapter 38 preparations, not pure compounds of chapter 29.
If when formulated as fertilizer component
Diammonium oxalate sold primarily as fertilizer ingredient classified by end use in chapter 31, not chemical structure.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Verify purity certificate showing >99% oxalic acid content to confirm classification under 2917.11 vs mixtures in chapter 38
• Include Material Safety Data Sheet (MSDS) documenting corrosive nature and proper hazard labeling for DOT compliance
• Avoid common pitfall of classifying technical grade with impurities >1% which may shift to 3824 as chemical preparations
Related Products under HTS 2917.11.00.00
Sodium Oxalate
Sodium oxalate (Na2C2O4) is the disodium salt of oxalic acid used in analytical chemistry and textile processing. Classified under HTS 2917.11.00.00 per chapter note on inorganic salts of organic acids staying with parent acid heading. Meets criteria as salt of acyclic polycarboxylic acid.
Potassium Binoxalate
Potassium hydrogen oxalate (KHC2O4) or potassium binoxalate used in photography and metal finishing. Falls under HTS 2917.11.00.00 as acid salt of oxalic acid per classification notes. Chemically defined organic compound containing required functional groups.
Dimethyl Oxalate
Dimethyl oxalate (CH3OOC-CO-OCH3) is the dimethyl ester of oxalic acid used as solvent and chemical intermediate. HTS 2917.11.00.00 covers oxalic acid esters per heading description and chapter ester classification notes. Liquid organic compound meeting chapter 29 purity requirements.
Diethyl Oxalate
Diethyl oxalate ((COOC2H5)2) is the ethyl ester of oxalic acid used in pharmaceutical synthesis and dye manufacturing. Specifically included in HTS 2917.11.00.00 as oxalic acid ester. Chapter notes confirm esters classified with parent acid occurring last in numerical order.
Ammonium Oxalate
Diammonium oxalate ((NH4)2C2O4·H2O) used in textile dyeing and analytical reagent applications. Classified HTS 2917.11.00.00 as salt of oxalic acid per chapter inorganic salt classification rules. Chemically defined compound meeting chapter purity standards.
Calcium Oxalate
Calcium oxalate monohydrate (CaC2O4·H2O) used in ceramics and as analytical standard. HTS 2917.11.00.00 classification follows chapter notes keeping organic acid salts with parent acid heading. Insoluble white powder meeting chemical definition.