Aspectus: crystallus albus vel pulveris albi crystallini.
Content: ≥99.50 %
Punctum liquescens:184.0-187.0°C
Sulphate (SO42-): 0.02 %
Metallum grave (ut Pb2+): 0.001 %
Reducta potassii permanganata (ml): ≤2.0%
Substantia insolubilis in aqua: ≤0.02%