Product
NIsin Manufacturer
  • Createtime: 2023-02-24
  • Updatetime: 2024-10-16
Product Details

1. Appearance and Properties

Nisin is a white to pale yellow powdery substance and may sometimes appear as a light brown solid powder.

2. Molecular Formula and Molecular Weight

Molecular Formula: C₁₄₃H₂₂₈O₃₇N₄₂S(some sources may provide C₁₄₃H₂₃₀N₄₂O₃₇S, which has slight differences, but the former is generally considered more accurate)

Molecular Weight: Approximately 3354.07 g/mol (other sources may give a similar value, such as 3354.09 g/mol)

3. Solubility

The solubility of nisin in water depends on the pH. It has higher solubility under acidic conditions and decreased solubility, even becoming insoluble in neutral or alkaline conditions. Specifically:

·In general water (pH = 7), the solubility is 49 mg/ml (other values may be cited, but this is generally considered reasonable)

·In 0.02M HCl, the solubility is 118 mg/ml

·At a pH of 2.5, the solubility is 12%

·At a pH of 5.0, the solubility decreases to 4%

4. Stability

The stability of nisin is related to the pH and temperature of the solution. It has good heat resistance under acidic conditions (e.g., at a pH of 2), but its heat resistance decreases when the pH exceeds 5. Additionally, nisin exhibits good acid resistance.

5. Other Physical Properties

·Density: The density of nisin is approximately 1.402 (the specific value may vary due to different preparation methods and conditions)

·Boiling Point: At 760 mmHg, the boiling point of nisin is 2966.771 °C (this value is theoretical and may not be achievable in practice)

·Refractive Index: The refractive index of nisin is 1.635

·Flash Point: The flash point of nisin is 1748.039 °C (also a theoretical value)

Nisin has specific appearance, molecular formula, molecular weight, solubility, stability, and other physical properties, which contribute to its broad application prospects in the food and pharmaceutical fields.

 

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