White or practically white, fused masses, in small pellets, in flakes or sticks and in other forms. Is hard and brittle and shows crystalline fracture.
Appearance (EP, BP)
White or almost white crystalline masses, supplied as pellets, sticks or slabs, deliquescent, readily absorbing carbon dioxide
Appearance (JP)
White, fused masses, in small pellets, in flakes, in sticks and in other forms. It is hard and brittle and shows a crystalline fracture.
Appearance (IP)
White, crystalline masses supplied as sticks pellets or slabs; deliquescent.
Solubility (USP)
Freely soluble in water and in alcohol
Solubility (EP, ВР)
Very soluble in water, freely soluble in ethanol (96%)
Solubility (JP)
It is freely soluble in water and in ethanol (95%) and practically insoluble in diethyl ether.
Solubility (IP)
Very soluble in water, freely soluble in ethanol (95%)
pH (0.01% in water at 25°C) (USP, EP, BP)
>= 11.00
Appearance of solution (EP, BP, IP)
Solution is clear and colourless.
Clarity & colour of solution (JP)
5% in water is clear and colourless.
Identification A (USP)
Reactions for sodium
Identification A, pH (EP, BP)
>= 11.0 (c = 0.01% in water)
Identification A (IP)
Reaction for sodium salt
Identification 1 (JP)
0.2% solution is alkaline
Identification B : pH (USP, IP)
>= 11.0 (c = 0.01% in water)
Identification B (EP, BP)
Reaction (a) of sodium
Identification 2 (JP)
Reactions for sodium salt
Insoluble substances and organic matter (USP)
5% solution is complete clear and colourless to slightly coloured
Arsenic (IP)
<= 0.0004%
Heavy metals (USP, JP)
<= 0.003%
Heavy metals (BP, IP)
<= 0.002%
Chloride (EP, BP)
<= 0.02%
Chloride (JP)
<= 0.05%
Chloride (IP)
<= 0.0125%
Iron (EP, BP)
<= 0.001%
Iron (IP)
<= 0.002%
Sulphate (EP, BP)
<= 0.02%
Sulphate (IP)
<= 0.0075%
Sodium carbonate (JP)
<= 2.0%
Sodium carbonate (USP)
<= 3.00%
Carbonate (EP, BP, IP)
<= 2.0%
Potassium (USP)
<= 0.5%
Potassium (JP)
The solution has no more turbidity than the control solution