China (Mainland) 
hydrofluoric acid
|
molecular formula: |
hf |
h.s.code |
281111 |
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|
molecular weight: |
20.01 |
un no. |
1790 |
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|
quality standard: |
gb 7744-2008 |
class |
8 (6.1) |
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|
|
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|
index name |
a |
b |
c |
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|
hydrofluoric(hf),%≥ |
70 |
55 |
49 |
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|
sulphate content(so4),%≤ |
0.02 |
0.02 |
0.02 |
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|
fluorosilicate(sif6),%≤ |
0.03 |
0.02 |
0.02 |
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1.properties:
the product has a strongly pungent odor and a strong toxicity. it is very corrosive. and it is a colorless and transparent solution. sometimes under the strong sunlight or high temperature environment, packaging especially white ones and
product appearance can
produce yellow
or light brown change, which
are the normal phenomenon and will not affect the use.
2.application:
the product is used in chemical industry, metallurgical industry ,glass industry, mine and chemical reagent and electro-clean, petroleum, atomic energy industry.
3.storage:
the product should be stored in a storehouse with good ventilation.
4.packing:
the product is refilled in a polythene plastic drum; net weight is 230kg per drum. of course, we can also fill it on consumers' requests.
|
melting point |
-35°c |
|
boiling point |
105°c |
|
density |
1.15 g/ml at 25 °c(lit.) |
|
vapor density |
1.27 (vs air) |
|
vapor pressure |
25 mm hg ( 20 °c) |
|
fp |
112°c |
|
water solubility |
soluble |
|
sensitive |
hygroscopic |
|
ridadr |
un 1790 8/pg 2 |
|
hazard note |
corrosive |
|
hazard class |
8 |
|
packing group |
ii |
