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Citrates

Citrates
Sodium Citrate Extra Pure Grade (IP Passing) Specifications
Parameters Standards
Description A white Crystalline Powder
Solubility Freely soluble in water
Identification Complies
Acidity & Alkalinity 0.20 Ml of 0.05 M H2SO4
Clarity & Colour of Solution A 10% solution in water is clear and colourless.
Max. Limits of Impurities
Arsenic <2 ppm
Heavy Metals <10 ppm
Chloride <100 ppm
Oxalate <300 ppm
Sulphate <150 ppm
Tartrate Complies
Water 12.10 % w/w
Assay (on anhydrous basis) 99.44 % w/w

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Ferric Ammonium Citrate -28% Specifications
Test Specifications
Appearance Thin, Transparent, dark red Brownish red powder with astringent taste, odorless, deliquescent in moist air and affected by light.
Assay NMT 28% and NMT 29.5%
pH of 5% Aqueous Solution 6.0 - 8.0
Arsenic (As) 2 ppm Maximum
Lead (Pb) 10 ppm Maximum
Zinc (Zn) 10 ppm Maximum
Free Ferric Compounds No blue precipitate appears with potassium Ferro cyanide solution.
Chloride (Cl) 0.25% Maximum
Sulphate (SO4) 0.30% Maximum

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