Supply CAS No.: 107667-60-7 L-Zinc Carnosine Powder

Items of analysis

Specification

Result

Appearance

White powder

White powder

Color

White to almost white

White

Smell

Odourless

Conforms

IR Spectrum

In accordance with structure

In accordance with structure

Identification

Must comply

Conforms

Specific Rotation[a]D20

+21.0±2.0o (C=2,H2O)

+20.4°(C=2,H2O)

Loss on Drying

≤1.0%

0.4%

Melting Point

243.0-263.0°C

conforms

Heavy Metals

≤10ppm

<10ppm

Arsenic

≤1ppm

<1ppm

Lead

≤3ppm

<3ppm

Cadmium

≤1ppm

<1ppm

Mercury

≤0.1ppm

<0.1ppm

Residue on Ignition

≤0.1%

<0.05%

pH(in 2% water)

7.5~8.5

7.9

L-histidine

≤1.0%

<1.0%

β-alanine

≤0.1%

<0.1%

Total aerobes counts

≤1000CFU/g

<100CFU/g

Mold & Yeast

≤100CFU/g

<10CFU/g

E.Coli

Negative

Not Detectable

Salmonella

Negative

Not Detectable

Hydrazine content

Not Detectable

Not Detectable

Particle Size

100% through 100 mesh

Conforms

Loose Bulk Density

0.321g/ml

Assay(HPLC)

99.0%(Area%)

99.2%

Conclusion

Accords with the USP36 standard