Citric Acid Anhydrous vs Citric Acid Monohydrate

 

Item Citric Acid Anhydrous Citric Acid Monohydrate
Molecular Formula C6​H8​O7​ C6​H8​O7​⋅H2​O
Molecular Weight 192.13 210.14
Moisture Content ≤ 0.5% Approx. 8.5%
Appearance White crystalline powder / fine crystals Colorless or white crystalline granules
Item Citric Acid Anhydrous Citric Acid Monohydrate
Hygroscopicity High; easily absorbs moisture and cakes Low; stable and less likely to cake
Thermal Behavior Melts directly Loses water of crystallization at approx. 100°C
Solubility Same acidity when dissolved in water Same acidity when dissolved in water
Stability Prone to degradation in humid environments Stable under normal temperature and dry conditions

Dosage Conversion (Important)

For equivalent acidity:1 part anhydrous citric acid ≈ 1.09 parts citric acid monohydrate

Example: 100g anhydrous citric acid → replace with 109g monohydrate.

Recommended Applications

  • Choose Citric Acid Anhydrous

    • Solid powdered foods (instant drinks, seasonings, chewing gum)
    • Moisture-sensitive pharmaceuticals and capsules
    • Chemical reactions requiring strictly anhydrous conditions

  • Choose Citric Acid Monohydrate

    • Beverages, juices, sodas, canned foods, confectionery
    • Detergents, descaling agents, daily chemicals
    • General food processing and household use

 Summary

  • Need low moisture, high purity, powder products → Anhydrous
  • General use, stable, cost-effective → Monohydrate
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