Citric Acid is mainly used as acidulant,flavoring agent, preservative and antistaling agent in food and beverage industry.it is also used as antioxidant,plasticizer and detergent in chemical,cosmetics and cleaning industries.
Quality Standards of Citric Acid Anhydrous
Item | Unit | BP 2009 | USP 32 | FCC 6 | E 330 | GB1987-2007 | |||
Characters | White Crystalline Powders,Colorless Crystals or Granules | ||||||||
Identification | Pass Test | ||||||||
Color & Clarity of Solution | Pass Test | Pass Test | / | Pass Test | / | ||||
Assay | % | 99.5-100.5 | 99.5-100.5 | ||||||
Water | % | ≤1.0 | ≤1.0 | ≤0.5 | ≤0.2 | ≤0.5 | |||
Light Transmittance | % | / | / | / | / | ≥96.0 | |||
Calcium | ppm | / | / | / | ≤75 | ≤200 | |||
Iron | ppm | / | / | / | ≤5 | ≤5 | |||
Arsenic | ppm | / | / | / | ≤1 | ≤1 | |||
Mercury | ppm | / | / | / | ≤1 | / | |||
Heavy Metals | ppm | ≤10 | ≤10 | / | ≤5 | / | |||
Oxalate | ppm | ≤360 | ≤360 | Pass Test | ≤100 | ≤100 | |||
Chloride | ppm | / | / | / | / | ≤50 | |||
Sulphate | ppm | ≤150 | ≤150 | / | ≤150 | ≤100 | |||
Readily Carbonisable Substances | Not Darker than Standard | Not Darker than Standard | Pass Test | Pass Test | ≤1.0 | ||||
Sulphated Ash | % | ≤0.1 | ≤0.1 | ≤0.05 | ≤0.05 | ≤0.05 | |||
Volatile Organic Impurities | / | / | Pass Test | ||||||
Tridodecylamine | mg/kg | / | / | ≤0.1 | |||||
Lead | ppm | / | / | ≤0.5 | ≤0.5 | ≤0.5 | |||
Aluminum | ppm | ≤0.2 | ≤0.2 | / | / | / | |||
Bacterial Endotoxins | IU/mg | <0.5 | Pass Test | / | / | / | |||
Water Insoluble Substances | / | / | / | / | Filtration time not more than 1 min; Filter membrane basically doesn't change color; Visual mottled particles not more than 3. |
citric acid anhydrous