FLUORHYDRIC
ACID (HF)*
* FLUORHYDRIC ACID IN SOLUTIONS 70%
PERFORMANCES
INVENTEC propose you aqueous solutions of fluorhydric acid
(HF) at 40%, 50% and 70%.
This product is also known as .hydrogenous fluoride.
We propose you three grades:
• The additived grade HF 70% filled in steel containers of 1200 KG,
and 2800 KG. Other specific capacities can be studied.
•
The HF 40%, 50%, 60% and 70%. Two packaging are available:
plastic jerrycans of 22 liters and steel drums of 220liters internally
coated with plastic.
•
The crystal grade HF 70 %
HF solutions are particularly used in the glass industry (frosting, satining), in crystal activities (defrosting)
and in ceramics activities.
Also, in metallurgical field, these grades are used in surface treatment, cast-iron-steel and stainless steels
cleaning.
HF solutions are also used in other more general applications such as the separation of rare earth, or
utilized as a catalyst.
SPECIFICATIONS
HF
STANDARD FEATURES
References
Purity / % weight
H2SiF6 / % weight
Sulphates / ppm weight
Chlorides / ppm weight
Iron/ ppm weight
Sulphuric acid / % *
40 %
40-42
• 0.03
LIMIT VALUE
50 %
70 %
50-52
70-73
• 0.03
• 0.3
ADDITIVE HF 70 %
70 %
70-73
• 0.03
2,5 to 3,5
* Sulphuric acid inhibits the corrosion of the steel. Various tests proved that the addition of 2,5 to 3,5 % of
H2SO4 allows the conservation and the handling of HF solutions in ordinary steel packaging when its grade
is equal or superior to 70%.
Fluorhydric acid (HF)
CHARACTERISTICS
Chemical Formula
N° CAS
Molecular weight
HF Content
Boiling temperature
Crystallization
temperature
Fusion point
Volumic weight
HF
G/mole
Under 1.013 bar
Under 1.013 bar
°C
°C
Under 1,013 bar
at 0 ° C
at 20 ° C
at 60 ° C
°C
kg/m3
40 %
112
- 49
50 %
105
- 37
60 %
87
- 42
7664-39-3
20
70 %
65
- 70
- 50
1159
1135
1100
- 37
1199
1172
1125
- 42
1235
1210
1150
- 75
1258
1230
1160
Water mixed with fluorhydric acid evaporates when it is put in contact with the air when the HF content is
superior to 40%.
DILUTION HEATS OF ONE GRAM OF FLUORHYDRIC ACID IN:
50 g H20
100 g H 20
at infinite dilution
47,90 kg
47,99 Kg
60,44 kg
DENSITY OF THE GRADES: g/cm3
TEMPERATURE
HF 70 %
50 %
0°C
1,25
1,20
20 ° C
1,23
1,17
50 ° C
1,18
1,14
PACKAGING
Packaging
Water
capacity (l)
Tara weight in
kg
Load in kg
Diameter
(mm)
Height (mm)
70 %
50%
70 %
22
22
22
206
220
220
1.6
1.6
1.6
120
20
20
25
20
20
210 or 235
240
240
308
585
585
585
585
585
522
890
890
890
890
2x2
inches
2
890
2x2
inches
2
PEHD Bung
2 ” (inches)
¾ ” (inches)
Material :
HF
Drums *
40 %
Jerrycan
40 %
2x2 inches
1
1
1
1
Polyethylene
High Density
High molecular weight
2
50 %
Polyethylene
High Density
High molecular
Weight
*Steel drum 10/9/10 internally coated with metal and plastic (internal bag in HDPE)
Container
70 %
1100
2500
1200
2800
Fluorhydric acid (HF)
Precautions to take:
• Never use this product without a prior reading and understanding of the material safety data sheet.
• Everyone who works with HF must have received a training and formation on the dangers related to
this product and on every preventive measures to take.
Please contact us for any other specific packaging.
STORAGE & shelf life
RECOMMENDED STORING CONDITIONS
Storing of the packaging
Every packaging has to be stored in a dry and specific well ventilated place, protected from the sun and
from bad weather, and easy of access.
Also, the packaging has to be placed over a vat of retention that will receive the product in case of eventual
leaks.
Compatibility with materials and irons
Most of the irons are attacked by the HF solutions.
Only platinum, gold, silver and mercury are resistant.
At high temperatures, alloys based on nickel are resistant.
The packaging made of High Density Polyethylene (HDPE) are recommended for all kinds of solutions.
According to the temperature and concentrations, polyester and fluoride resin can also be used.
INVENTEC uses «Teflon gaskets ® » for iron packaging.
CONDITIONS OF USE
IMPORTANT REMINDER
HF in solution is a particularly aggressive and irritating acid. In addition to that, it is an acid delay. A light
contact with the skin may not be felt immediately.
For all handling, the operator has to be perfectly protected and has to work at least with someone who
watches on him. He has to wear adapted protections such as anti-acid suit, gloves, eyeshades, a pair of
glasses, and appropriate masks. All these equipments have to be tested before every use.
For the containers, after each decanting, the gas or liquid flanges have to be tightly closed with the new
Teflon gasket in order to prevent the inlet of humidity. A new gasket is provided with each container, and is
placed under the cap of the container.
Please keep in mind that in case of burning (projection of the HF on the skin), the rapidity of the intervention
is very important. It has to occur a few seconds after the incident that is why the training of the staff is
important to operate in case of emergency.
Every concerned person can refer to the safety instructions that has been redacted by AVANTEC, and
which are very appreciated by the users.
To sum up those instructions, in case of skin chemical burning, you must immediately splash water
(preferably warm water in order to attenuate exothermic effect) on the burnt surface during 15 minutes, and
then massage with gel or gluconate of calcium at 2,5 %.
In order to prevent the leaks or the damage of the gaskets or canalizations, the installations containing HF
have to be regularly inspected.
Fluorhydric acid (HF)
HSE
Identification of the dangerous product:
Taken from the CE list of dangerous substances (Annex I of the modified directive
67/548/CEE).N°: 231-643-8
Fluorhydric Acid
Symbols and danger indications:
Very toxic (T+)
Corrosive (C)
Phrases R:
R 26/27/28: Very toxic by inhalation, by contact with the skin and by ingestion
R 35: Causes serious burns
Phrases S:
S 7/9: Keep the packaging in an isolated and well ventilated place
S 26: in case of contact with the eyes, wash immediately and thoroughly with water and get in touch with a
specialized doctor (dermatology).
S 28: After contact with the skin, wash immediately and thoroughly with water.
S 36/37/39: wear appropriate protection clothing, gloves and a material to protect the eyes and the face.
S45: In case of accident or discomfort, consult immediately a Doctor, and if possible, show him the label.
Classification ICPE: 1111-2
This data is based on information that the manufacturer believe to be reliable and offered in good faith. In no
event will INVENTEC be responsible for special, incidental and consequential damages. The user is
responsible to the Administrative Authorities (regulations for the protection of the Environment) for the
conformity of his installation.
FPW.SB.10007 002 -