L-Glutamine :

Description: White crystalline powder with barely perceptile out and acid taste. soluble in hot water, slightly soluble in water, practically insoluble  in ethanolacetoneaether.

Standards: USP26/FCCIV

Specification:

Specific rotation[α] D20°:                   +6.3°~ +7.3°

State of solution(transmittance):     Clear and colorless 98.0% min.

Chloride[Cl]:                                         0.020% max.

Ammonium [NH₄]:                              0.01% max.

Sulfate[SO₄]:                                         0.020% max.

Iron[Fe]:                                                 10ppm max

Heavy metals [Pb]:                              10ppm max.

Arsenic[As₂O₃]:                                   1ppm max.

Other amino acids:                              Conforms

Loss on drying:                                     0.30% max.

Residue on ignition[sulfated]:                    0.10% max.

Assay:                                                     98.5% min.

PH:                                                          4.5 ~ 6.0