Synthesis
US patent 6,342,367 (Method for the preparation of chondroitin sulfate compounds) presents a preparation process.
US patent 9,149,572 (Chondroitin sulfate having decreased molecular weight and use thereof) describes a low molecular weight chondroitin sulfate.
Quality Standards & Test Methods
1. Physical and chemical indexes
|
Item
|
Physical and chemical indexes
|
|
Actives, %, ≥
|
85.0
|
|
Loss on drying, %, ≤
|
10.0
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Test Methods
(1), Actives
(2), Loss on drying
105°C, 4h.
2. Hazardous substances indexes
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Item
|
Hazardous substances indexes
|
|
Heavy metals (as Pb), mg/Kg, ≤
|
20
|
|
As, mg/Kg, ≤
|
3
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Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents - Determination of total arsenic
3. Product standards
(1), Chinese standards