CAS: 73-32-5

EINECS: 200-798-2

Molecular formula: C6H13NO2

Molecular weight: 131.17

White crystalline flake or crystalline powder. Slightly bitter. Odourless. The sublimation temperature is 168-170℃. It is an essential amino acid necessary for normal infant development and adult nitrogen balance. There are four isomers, and only l-type can have physiological effects. Excessive consumption will antagonize leucine and hinder development. Adult men need 1.3g/100ml.

1. Sugar, ammonia, D? Threonine was fermented by serichia coli. or with sugar, ammonia, alpha-aminobutyric acid as raw materials, with yellow small cocci or bacillosis bacilis after fermentation and refined.

2. Strain culture and fermentation fermentation liquid filters oxalic acid from the upper liquid, and H2SO4 filters the filtrate for adsorption.

3. Eluent concentration vacuum distillation decolorization concentration vacuum distillation neutralization ammonia precipitation refined crystallization

4. Dried l-isoleucine products at 105℃

5. Tobacco: BU, 22; FC, 21; Synthesis: it can be hydrolyzed and refined from corn protein. It can also be synthesized chemically.