Sodium Citrate Dihydrate USP
Sodium citrate dihydrate is the sodium salt of citric acid, classified under HTS 2918.15.5000 as a salt of citric acid with alcohol function but without other oxygen function. It is a white crystalline powder widely used as a buffering agent, anticoagulant in blood collection tubes, and preservative in food products.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as pure citric acid before salt formation
Citric acid itself (not salts/esters) is classified under the specific citric acid heading occurring earlier in numerical order.
If blended with other additives exceeding Chapter 29 purity limits
Mixtures not meeting Chapter 29 chemical definition requirements fall under prepared chemical mixtures in Chapter 38.
If formulated specifically as diammonium phosphate fertilizer
Agricultural formulations take precedence over pure chemical classification per Chapter notes.
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Import Tips & Compliance
• Ensure USP certification documentation for pharmaceutical grade imports; verify purity certificates as impurities may affect classification; check FDA prior notice requirements for food contact substances
Related Products under HTS 2918.15.50.00
Tripotassium Citrate Monohydrate
Tripotassium citrate is a potassium salt of citric acid used in food as an acidity regulator and in pharmaceuticals as an alkalizing agent. It falls under HTS 2918.15.5000 as 'other' salts and esters of citric acid per Chapter 29 classification rules.
Disodium Citrate
Disodium citrate, a salt of citric acid, serves as a buffering agent in pharmaceuticals and as an emulsifying salt in processed cheese. Classified under HTS 2918.15.5000 as other citric acid salts per the chapter's last-in-numerical-order rule.
Ferrous Citrate
Ferrous citrate is an iron salt of citric acid used in nutritional supplements and as a food fortificant. It qualifies under HTS 2918.15.5000 as a metal salt of citric acid per Chapter 29 note (C)(1) classification with the organic acid component.
Trisodium Citrate Dihydrate FCC Grade
FCC-grade trisodium citrate dihydrate meets food chemical codex standards for use as a sequestrant and pH control agent in beverages and dairy products. HTS 2918.15.5000 covers this common food-grade salt of citric acid.
Calcium Citrate Tetrahydrate
Calcium citrate tetrahydrate serves as a calcium supplement and antacid, derived from citric acid and calcium hydroxide. Classified under HTS 2918.15.5000 as a carboxylic acid salt with alcohol function.
Magnesium Citrate Powder
Magnesium citrate powder functions as a laxative and nutritional supplement, formed from citric acid and magnesium sources. HTS 2918.15.5000 applies to this salt per Chapter 29 organic salt classification rules.