Sodium Hydroxide Pellets

Sodium Hydroxide BP Eur Grade Specifications

Caustic Soda PelletsSodium HydroxideNaOH -- 40.00

DEFINITIONContent97.0 per cent to 100.5 per cent Sodium Hydroxide.

CHARACTERSAppearanceWhite or almost white, crystales, supplied as pellets, sticks or slabs, deliquescent, readily absorbing carbon dioxide.SolubilityVery soluble in water, freely soluble in ethanol (96 per cent).

IDENTIFICATIONA. minimum 11.0.B. 2 ml of solution S gives reaction of sodium.

TESTSSolution SCarry out the procedure described below with caution. Dissolve 5.0 g in 12 ml of distilled water. Add 17 ml of hydrochloric acid R1, adjust to 7 with 1 M hydrochloric acid and dilute to 50 ml with distilled water.Appearance of solutionThe solution is clear and colourless.Dissolve 1.0 g in 10 ml of water.CarbonatesMaximum 2.0 per cent, calculated as Na2CO3 as determined in the assay.ChloridesMaximum 50 ppm.SulteMaximum 50 ppm.IronMaximum 10 ppm, determined on solution S.Heavy metalsMaximum 20 ppm.