USD $0.10-0.20 / Kilogram
USD $1.00-10.00 / Kilogram
USD $100.00-150.00 / Kilogram
USD $45.00-50.00 / Gram
USD $8.80-8.80 / Gram
USD $6.00-9.00 / Gram
USD $10.00-16.00 / Kilogram
USD $5.00-10.00 / Kilogram
USD $3.00-10.00 / Kilogram
sense index |
|||
items |
index |
||
vc grade |
food grade |
toothpaste grade |
|
appearance |
colorless or yellowish, clear and transparent liquid. |
||
specifications |
|||
solid content |
70% |
70% |
70% |
refractive index (20c) |
≧1.455 |
≧1.455 |
≧1.455 |
density (25/25c) |
≧1.295g/ml |
≧1.295g/ml |
≧1.295g/ml |
specific rotation (20c) |
≧+5.3゜ |
- |
- |
ph (50% aq.sol.) |
- |
5.0-7.5 |
5.0-7.5 |
reducing sugars |
≦0.1 % |
≦0.15 % |
≦0.15 % |
total sugars |
≦0.3% |
≦8% |
≦10% |
non-crystallization (–18degc) |
- |
- |
≧24hours |
hygiene index |
|||
heavy metal |
5mg/kg |
5mg/kg |
5mg/kg |
nickle |
1mg/kg |
1mg/kg |
1mg/kg |
pb(pb2+) |
0.5mg/kg |
0.5mg/kg |
0.5mg/kg |
as(as3-) |
0.5mg/kg |
0.5mg/kg |
0.5mg/kg |
sulphate ash |
0.1% |
0.1% |
0.1% |
chlorid |
10mg/kg |
20mg/kg |
20mg/kg |
sulphate |
30mg/kg |
30mg/kg |
30mg/kg |