Physical Properties: White crystals or crystalline powder; slightly bitter taste. Sparingly soluble in water
L-isoleucine is one of the branched chain amino acids (L-isoleucine, L-valine, and L-leucine) and is classified as an essential amino acid. This means the body cannot manufacture L-isoleucine; it must be acquired through diet or supplementation. The male adult’s daily requirement is 10 mg per kg of body weight. Food sources for isoleucine include almonds, cashews and soy protein.
Item | Specification( FCC IV) | Results |
Description | White crystals or crystalline powder, tastes at first slightly sweet and then bitter | Conforms |
Identification | Compare the infrared absorption spectrum of the sample with that of the standard by potassium bromide disc method | Conforms |
Specific rotation [α]D20 | +38.9°to+41.8° | +40.6° |
Chloride(Cl) | Not more than 0.05 % | Less than 0.05% |
Sulfate(SO4) | Not more than 0.10% | Less than 0.07% |
Iron(Fe) | Not more than 0.003% | Less than 0.003% than0.003% |
Arsenic | Not more than 1.5ppm | Less than 1.5ppm |
Heavy metals(Pb) | Not more than 0.0015% | Less than 0.0015% |
Loss on Drying | Not more than 0.3 % | 0.10% |
Residue on ignition (sulfated) | Not more than 0.3% | 0.11% |
Assay | More than 98.5% | 99.1% |
pH | 5.5 to 7.0 | 6.1 |
