TEST ITEM |
STANDARD SPECIFICATION |
TEST DATE |
CHARACTERS
|
WHITE CRYSTAL OR CRYSTALLINE POWDER |
MEET THE REQUIREMENT |
IDENTIFICATION |
MEET THE REQUIREMENT |
MEET THE REQUIREMENT |
APPEARANCE OF SOLUTION |
SOLUTION IS CLEAR AND COLOURLESS |
SOLUTION IS CLEAR |
RELATED SUBSTANCES |
ANY IMPURITIES NOT MORE THAN 0.1% |
0.033% |
THE SUM OF IMPURITIES NOT MORE THAN 0.25% |
0.13% |
|
HEAVY METALS |
≤20ppm |
<20ppm |
LOSS ON DRYING |
≤0.5% |
0.17% |
SULPHATED ASH |
≤0.1% |
0.04%
|
ASSAY |
CONTAINS C9H8O4 99.5% - 101.0% |
99.58% |