| Reagent Ammonium Hydrogen Fluoride
Properties: white crystal; deliquescent;
soluble in water; slightly soluble in alcohol; dissociate upon heating
or in contact with hot water; corrosive to glass; toxic.
Application: for chemical analysis; etching
on ceramics or glass; suppressant to bacteria
Product Quality:
| Item |
Analytic Grade |
C.P. |
| purity (NH4HF2),
no less than |
98.0% |
95.0% |
| max. impurity (in
%) |
|
|
| residue, ignition
(in sulfate) |
0.02 |
0.06 |
| chloride (CL) |
0.001 |
0.005 |
| sulfate (SO4) |
0.005 |
0.01 |
| fluosilicate (in
SO3) |
0.1 |
0.5 |
| iron (Fe) |
0.001 |
0.005 |
| heavy metal (in
Pb) |
0.002 |
0.005 |
Storage: avoid water vapor; store in tightly
sealed vessel
Reagent Fluoboric Acid
Properties: clear solution; strongly acidic;
hydrolyzable; not corrosive to glass under room temp.; concentrated
solution should not be stored in glass vessel for prolonged time;
toxic; corrosive.
Applications: stabilizer for diazotates;
catalyst for organic synthesis; also for dissolving titanium sponge
and its alloy; in printed circuit board industry
Product Quality:
| Item |
Value
(%) |
| analytical
grade |
chemical
pure |
purity
(HBF4) |
40 |
40 |
chloride
(CL) |
0.002 |
0.005 |
sulfate
(SO4) |
0.001 |
0.002 |
iron
(Fe) |
0.001 |
0.003 |
heavy
metal (in Pb) |
0.002 |
0.005 |
Storage: in cool, dry and well ventilated
depot.
|
