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Molecular Formula:
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C 143 H 228 O 37 N 42 S 7
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Molecular Weight:
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3348
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Product code:
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China 17.019
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INS 234
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CAS 1414-45-5
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Specification of Product
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Program
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Specification
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Appearance
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Off-white powder
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Content (IU/mg)
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≥ 1000
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Moisture(%)
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≤ 3
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Heavy Metals (Pb) (mg/kg)
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≤ 0.001
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≤ 10
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As(%)
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≤ 0.0001
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NaCl (%)
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≥ 50
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Count of Colony (cuf/g)
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≤ 10
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E. coli. (MPN/100g)
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≤ 30
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Salmonellae spp.
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Absent in 25g
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Stability
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Nisin is most stable under acid conditions. It can keep the activity after the treatment at 121 for 30mins at pH2; 47% of the activity remained after the treatment in 110 for 30mins in nonfat milk in pH6.5; But the activity lost rapidly in 30 minutes at 63 in pH 11.
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Solubility
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Nisin can be dissolved in aqueous solution, but is insoluble in non-polar solvents. The solubility decreases with the increase of pH, and it increases with the rise of temperature.
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