| Detailed Description: |
Cas No. :73-31-4
Melatonin 99% by HPLC
Delivery on time
Professional service,strictly QC/QA system
GMP+KOSHER+HALAR+ISO9001
|
Item
|
Specification
|
Results
|
|
Assay(MELATONIN 99% by HPLC)
|
≥ 99.0 %
|
99.45%
|
|
Appearance
|
A white or pale-white crystalline powder, odorless
|
Complies
|
|
Loss on drying
|
0.5%MAX
|
0.17%
|
|
Identification
|
Positive reaction
|
Complies
|
|
Residue on ignition
|
0.1%MAX
|
0.07%
|
|
Melting point
|
117~120°C
|
118~119.5°C
|
|
Heavy metal
|
10ppm MAX
|
Complies
|
|
Clarity and degree of opalescence of liquids
|
1% ethanol and chloroform solution
|
Complies
|
|
Particle size
|
80-120 mesh
|
Conforms
|
|
Individual
|
0.5% MAX
|
0.2%
|
|
Total
|
1.0% MAX
|
0.42%
|
|
Yeast & mold
|
<100/ g
|
Conforms
|
|
E.coil
|
Negative
|
Negative
|
|
Salmonelia
|
Negative
|
Negative
|
|
T:;
