1 CAS No.5949-29-1 2 EC No. 200-662-2 3 crystalline white solid 4 Purity 99.5%min 5 Packing: AR500g/bottle

a Properties

 propertiesHazards

Molecular formula	C6H8O7
Molar mass	192.124 g/mol (anhydrous)210.14 g/mol (monohydrate)
Appearance	crystalline white solid
Density	1.665 g/cm3(1.5g/cm3 for monohydrate)
Melting point	153 °C, 426 K, 307 °F
Boiling point	175 °C, 448 K, 347 °F (decomposes)
Solubility in water	73 g/100 ml (20 °C)
Acidity (pKa)	pKa1 = 3.09pKa2 = 4.75pKa3 = 6.41 [1]
Main hazards	skin and eye irritant

 Specifications

Test item	Specification
	Reagent grade	Pharmaceutical grade
Appearance	Conform	Conform
Assay [C6H8O7] /%	≥99.8	≥99.0
Clarify degrees test	Conform	Conform
Water insoluble/%	≤0.005	≤0.01
Burning residua (SO4) /%	≤0.02	≤0.07
Chloride (Cl) /%	≤0.0005	≤0.005
Sulfate (SO4)/%	≤0.005	≤0.02
Phosphate  (PO4)/%	≤0.001	≤0.005
Oxalic acid salt (C2O4)/%	≤0.05
Calcium (Ca) /%	≤0.005	≤0.02
Ferric (Fe) /%	≤0.0005	≤0.001
Copper (Cu) /%	≤0.0005
Lead (Pb) /%	≤0.0005	≤0.001
Easy carbonized material	Conform

Application 

Citric acid is used as a successful alternative to nitric acid in passivation of stainless steel.Citric acid was the first successful eluant used for total ion-exchange separation of the lanthanides, during the Manhattan Project in the 1940s. In the 1950s, it was replaced by the far more efficient EDTA.Citric acid can be used to slow setting of Portland cement. It can delay setting time substantially.

Citric Acid AR500g