|
CHEMICAL
FORMULA ：NH4HF2 M.W.:
57.04
DESCRIPTION: white
or colorless fransparent rhomb lamdllar crystal,relative
density in 1.52,melting point in 125.6℃ and boiling point in 240℃ more easily air slaking,diluted slightly in cool water,decomposition
and a atrong acidity in hot water,corrosive
to glass also to skin ,dangerous!
| SPEC |
|
|
|
ITEMS |
Yotech Standard |
JISK1407-78 |
|
Appearance ％ |
White
salt-like crysta |
White
salt-like crysta |
|
Assay
％ |
≥99％ |
≥96％ |
|
SO4
％ |
≤0.05 |
≤0.1 |
|
fluosilicate
％ |
≤0.02 |
≤3 |
|
Heavy
metal
％ |
|
≤0.002 |
|
Residue
on ignitionn ％ |
≤0.005 |
≤0.2 |
|
Loss
on drying ％ |
≤0.5 |
≤3 |
|
Middle Control Item |
|
White degree
％ |
|
|
|
Permeation rate 15％ |
|
|
|
Particle
size (micron) |
|
|
|
Store period
|
|
|
|
Provide reference |
|
Produce
technics |
|
|
|
Packing |
50KG paper- plastic
bag |
50KG paper- plastic
bag |
|
