Certification: | ISO |
---|---|
Storage Method: | Normal |
Application: | Cosmetic |
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Item
|
Specification
|
Results
|
|
Appearance
|
White crystalline powder
|
White crystalline
|
|
Assay (HPLC)
|
99.5%Min
|
99.92%
|
|
Melting range
|
199~201±0.5
|
199-200
|
|
Clarity of water solution
|
Transpency,colorless, none suspended matters
|
Pass
|
|
pH value of 1% aqueous solution
|
5.0~7.0
|
6. 19
|
|
Specific optical ratation
|
α D20=-66±2º
|
-66.0
|
|
IPV
|
1515cm- 1 1220cm- 1 1050cm- 1±(5~8) cm- 1
|
Pass
|
|
Arsenic
|
≤2 PPM
|
Pass
|
|
Hydroquinone
|
≤ 10 PPM
|
Pass
|
|
Heavy metal
|
≤ 10 PPM
|
Pass
|
|
Loss on drying
|
≤0.5%
|
Pass
|
|
Lgnition residue
|
≤0.5%
|
0.08%
|
|
Pathogen
|
Bacteria ≤300cfu/g
Fungus≤ 100cfu/g
|
0.08%
|
|
Conclusion
|
PASS
|
|