tech grade: (liquid)
items |
specifications |
appearance |
light yellow transparent liquid |
colorpt-co |
≤65 |
total acid |
≥70% |
cl |
≤3% |
formic acid |
≤1.5% |
so4﹣ |
≤800pm |
turbidity |
≤6ntu |
cosmetic/pharmaceutical grade
items |
specifications |
appearance |
colorless transparent liquid |
colorpt-co |
≤30 |
total acid |
≥70% |
heavymetalcontent |
≤20ppm |
cl |
≤10ppm |
crystal:
items |
specifications |
appearance |
white crystalline powder |
total acid |
≥99.0% |
heavymetal |
≤10ppm |
fe |
≤10ppm |
loss on drying |
≤0.5% |
ash |
≤0.1% |
store in cool place. keep container tightly closed in a dry and well-ventilated place. containers which are opened must be carefully resealed and kept upright to prevent leakage.