Ferric Chloride Hexahydrate BP Grade Ph Eur
FeCl3-6H2O -- 270.3 -- CAS 10025-77-1

DEFINITION
Content: 98.0 per cent to 102.0 per cent.

CHARACTERS
Appearance: Crystalline mass or orange-yellow or brownish-yellow crystals, very hygroscopic.
Solubility: Very soluble in water and in ethanol (96 per cent), freely soluble in glycerol.

IDENTIFICATION
A. It gives reaction of chlorides.
B. It gives reaction of iron.

TESTS
Solution S: Dissolve 10 g in distilled water and dilute to 100 ml with the same solvent.
Acidity: In a suitable polyethylene container, dissolve 3.0 g of potassium fluoride in 15 ml of water. Titrate with 0.1 M sodium hydroxide using 0.1 ml of phph solution as indicator until a pink colour is obtained. Add 10 ml of solution S and allow to stand for 3 h. Filter and use 12.5 ml of the filtrate. Not more than 0.30 ml of 0.1 M sodium hydroxide is required to change the colour of the indicator to pink.
Free chlorine: Heat 5 ml of solution S. The vapour does not turn starch iodide paper blue.
Sulphates: Maximum 100 ppm.
Ferrous ions: Maximum 50 ppm.
Heavy metals: Maximum 50 ppm.

Ferric Chloride Hexahydrate Analytical Reagent Grade
Iron(III) Chloride Hexahydrate
FeCl3-6H2O
Formula Weight 270.30
CAS Number 10025-77-1

REQUIREMENTS
Assay: 97.0-102.0% FeCl3-6H2O

MAXIMUM ALLOWABLE
Insoluble matter: 0.01%
Nitrate (NO3): 0.01%
Phosphorus compounds (as PO4): 0.01%
Sulfate (SO4): 0.01%
Copper (Cu): 0.03%
Zinc (Zn): 0.03%
Ferrous iron (Fe++): Passes test Substances not precipitated by ammonium hydroxide (as sulfates): 0.1%