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Published: 27/11/2019


CAS No.24634-61-5
EINECS No.246-376-1
E numberE202
DescriptionWhite to yellowish-white crystalline powder or spherical granules
Shelf life36 months
StorageStore in original closed packaging , protected from sunlight and at ambient temperature (Max 30°C) and under dry conditions ( max.65% relative humidity)
Country of ManufactureGermany


Molecular Mass(Relative)150.22
Solubility(Freely soluble in water)Approx 1400 g/L at 20°C
Solubility(Less soluble in Ethyl alcohol)Approx 1 g/L at 20°C
Identification(Ultra- violet absorption)UV-Maximum 264 +/- nm ( solution of 0.002 g/L in water at pH<3)
Test for potassiumPositive
Assay(Of C6H7KO2, on dry weight basis)99% to 101%
Loss on drying(Karl Fischer method)<=0.5%
pH(10% water solution)8.5 - 10.5
Heat ResistanceNo discoloration after 90 minutes at 105°C
Melting Range(based on the range of sorbic acid)132°C - 135°C
Alkalinity(Calc. as K2CO3)<=0.1%
Aldehydes(as formaldehyde)<=0.1%
Heavy metals(expressed as lead)<= 10 ppm, mg/kg
Lead<=0.1 ppm, mg/kg
Arsenic<=0.1 ppm, kg/kg
Mercury<=0.01 ppm, mg/kg
Cadmium<=0.02 ppm, mg/kg
Zinc<=0.1 ppm, mg/kg
Chloride (Cl)<=100 ppm, mg/kg
Sulphate<=150 ppm, mg/kg