Appearance

Off-white or light yellow powder, Fine powder

Identification

The IR spectrum of the sample is consistent with that of the reference standard

The retention time of the major peak of product corresponds to that of the standard 

Solubility

Very Slight soluble in water；soluble in alkali-OH Soln；Almost insoluble in ethanol、acetone、Ether、Chloroform；

Melting Point

138.0℃~143.0℃

Water Content

NMT 10.0%

pH

2.6~3.0

Particle size

100% through 65 mesh, No less than 60% 

through 80mesh 

Density

0.35~0.60g/ml

Heavy Metal

NMT 10ppm

Loss on Drying

NMT 1.0%

Vitamin B6

(Pyridoxine HCL)

NMT 0.50%

Residual Solvents

Methylbenzene：NMT 890 ppm

Ethanol：NMT 5000 ppm

n-Butyl alcohol:NMT 5000 ppm

Assay

(dried substance)

98.0%-102.0%

Microbiological Tests

Total Plate Count：NMT 1000CFU/g

Yeast and Mold：NMT 100CFU/g

Salmonella Spp：Negative

E.Coli:Negative

Staphylococcus Aureus:Negative

Coliforms:Negative