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Published: 28/10/2019


DescriptionWhite or off-white spherical, slight characteristic odour, freely soluble in water(approx 1400 g/Lat 20 °C) less soluble in ethyl alcohol (approx .1 g/L at 20 °C)and practically insoluble in ether. It decomposes at about 270°C.
Functional group(Use)Preservative(food grade), antimicrobial agent
CAS No.590-001/24634-61-5
E numberE202
EINECS No.246-376-1
Shelf life24 months
StorageStore in original closed packaging away from sunlight and at ambient temperature(suggest below 38°C and 70% relative humidity.)
AppearanceWhite or off white spherical.


Chemical(Name)2, 4-Hexadienoic acid, Potassium salt
Molecular Mass(Relative)150.22
IdentificationUltra-violet absorption:UV-Maximum 264+/- 2nm (solution od 0.002 g/L in water at PH<3)Test for potassium sorbate: Positive
PackagingPack in 25 kgs carton, 500 kgs or 1000 kgs bag.
Assay(on dry weight basis %)99.0%~101.%
Melting Range133-135°C
Alkalinity(Free (as K2CO3), %)Passes test (<=1%)
Loss on drying(105 °C for 3 hours), %)<=1.0%
Acidity(As Sorbic Acid)passes test (about 1 %)
pH(value (5% water solution))8.5-10.5
Heavy metals(As lead)<=10 ppm, mg/kg
Arsenic<=3 ppm, mg/kg
Lead<= 2 ppm, mg/kg
Sulfate(as SO4%)<= 380 ppm, mg/kg
Organic Volatile ImpuritiesMeets the requirements complied
Aldehydes(as formaldehyde %)<=0.1%
Cadmium<=0.02 ppm, mg/kg
Zinc<= 0.1 ppm, mg/kg
Mercury<= 1 ppm, mg/kg
Heat(Stability)No discoloration after 90 minutes at 105 °C