Citrates

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

Parameters	Trisodium Citrate Dihydrate EP
Formula	C6H5Na3O7.2(H2O)
CAS Nos.	6132-04-3
Molecular Weight	294.12
Appearance	Colorless Crystalline Powder
Assay	99.00 % ( +/-1)
pH	8.0
Free Alkali (as NAOH)	NMT 0.05 %
Chloride	NMT 0.005 %
Sulphates	NMT 0.005 %
Heavy Metals ( as PB )	NMT 0.002 %

Product name	Ferric Ammonium Citrate
Formula	C6H8O7.Fe.NH3
CAS Nos.	1185-57-5
Molecular weight	279.99
Appearance	Reddish Brown Crystalline Powder
Assay (as Fe)	20.5 to 22.5 %
pH	6.0-8.0
Chloride	NMT 0.25 %
Sulphates	NMT 0.30%
Heavy Metals ( as PB )	NMT 0.003 %
Zinc	NMT 0.005 %

Product name	Ammonium Citrate
Formula	(NH4)2C6H6O7
CAS Nos.	3012-65-5
Molecular weight	226.19
Appearance	White crystalline granule
Assay (as Fe)	Min. 97 %
Oxalates	NMT 0.04 %
Sulphates	NMT 0.015 %
Phosphates	NMT 0.03 %
Heavy Metals ( as PB )	NMT 0.0005 %
Water	1.1-1.3 %

Product name	Potassium Citrate
Formula	HOC(COOK)(CH2COOK)2·H2O
CAS Nos.	866-84-2 (Anhydrous 6100-05-6 (Monohydrate)
Molecular weight	324.42
Appearance	White Crystalline Powder
Assay (as Fe)	99 - 101 %
pH ( 10 % Sol.)	7.5 - 9.0
Chlorides	NMT 0.005 %
Sulphates	NMT 0.15 %
Oxalates	NMT 0.03. %
Sodium base	0.3 %
Heavy Metals ( as PB )	NMT 0.001 %
Moisture	4.0-7.0 %