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1.Quality
of Product
(1.) cosmetic grade sodium hyaluronate
Item |
standard |
Appearance |
white powder |
Transparency (0.1%solution) % ≥ |
98 |
D-glucuronic acid % ≥ |
44 |
Molecular weight |
< 0.1x10 6 Da , 0. 5 ~ 0. 7 x10 6 Da , 0. 7 ~ 0. 9 x10 6 Da , 0. 9 ~ 1.1 x10 6 Da , 1.1 ~ 1.3 x10 6 Da , 1.3 ~ 1.5 x10 6 Da , 1.5 ~ 2.0 x10 6 Da ,> 2.0 x10 6Da |
PH(0.1% solution) |
5.5~7.5 |
Protein % ≤ |
0.1 |
Heavy metal g/g ≤ |
2x10 -5 |
Loss on drying % ≤ |
10 |
Total aerobic plate count CFU/g ≤ |
100 |
Pyocyanine |
Absent |
mould |
Absent |
(2.) 1% solution HA
Item |
Standard |
D-glucuronic acid ? ≥ |
0.44 |
Protein ? ≤ |
0.002 |
Transparency (0.1% solution) ≥ |
98.0 |
pH (0.1% solution) |
5.5 ~ 7.5 |
Heavy metal g/g ≤ |
2×10 -5 |
Total aerobic plate count CFU/g ≤ |
100 |
(3).Food grade sodium hyaluronate
Item |
Standard |
Appearance |
White powder |
D-glucuronic acid % ≥ |
44.0 |
Protein % ≤ |
0.10 |
Loss on drying % ≤ |
10.0 |
Residue on ignition % ≤ |
15.0 |
Transparency (0.1% solution) % ≥ |
98.0 |
pH (0.1% solution) |
5.5 ~ 7.5 |
Arsenic g/g ≤ |
2×10 -6 |
Heavy metal g/g ≤ |
2×10 -5 |
Total aerobic plate count CFU/g ≤ |
100 |
mould CFU/g ≤ |
100 |
Escherichia Coil |
Absent |
Pseudomonas aureoglnose |
Absent |
Staphylococcus Aureus |
Absent |
analytic method:
(1).protein: Bradford method
(2).glucuronic acid: Bitter-Muir method
(3).loss due to drying: drying at 105°C to keep constant weight
(4).other index: state standard "DALI" Hyaluronic acid has specific advantages as follows:
(1). "DALI" Hyaluronic acid has high purification of more than 91%, with D-glucuronic acid content being more than 44%.
(2). Since "DALI" Hyaluronic acid is fine classified in terms of different molecular weight , it can be tailored for customers with various requirememts.
(3). Protein content in "DALI" Hyaluronic acid is so low that it can be rarely detected by Bradford method, thus hypersensitivity is prevented when using cosmetics made from "DALI" Hyaluronic acid;
(4). "DALI" Hyaluronic acid doesn't contain antiseptic and thickening agent. Hazardous chemicals aren't allowed to be used during production so as to guarantee HA product.
(5). Key equipment and materials are imported for good quality. And Other materials are non-animal, then uncertain infection from animals is avoided so that HA product is guaranteed.
(6). "DALI" Hyaluronic acid has high safety for the total amount of bacteria can't be detected basically.
(7). Its solution has high transparency of more than 98%, so it can be widely applied
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