40276
Hydrofluoric acid
49.5-50.5%
Synonym(s):
HF
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About This Item
Linear Formula:
HF
CAS Number:
Molecular Weight:
20.01
UNSPSC Code:
12352106
PubChem Substance ID:
EC Number:
231-634-8
MDL number:
Assay:
49.5-50.5%
vapor density
1.27 (vs air)
vapor pressure
25 mmHg ( 20 °C)
assay
49.5-50.5%
CofA
specification on request
density
1.15 g/mL at 25 °C (lit.)
SMILES string
[H+].[F-]
InChI
1S/FH/h1H
InChI key
KRHYYFGTRYWZRS-UHFFFAOYSA-N
General description
HF is a colorless inorganic acid. Hydrogen fluoride may be formed by reacting calcium fluoride and sulfuric acid at 200oC. The fluoride in the acid has very high affinity to silicon, making it useful in etching or removal of silicon.
Application
Industrial uses of HF include etching or polishing glass, ceramics and silicon surfaces. HF may be used to etch silica capillaries for it behave as a filter and an integrated nanofluidic device for the stacking of DNA and proteins. Dentin and ceramic inlays may be etched with HF for better adhesive bonding. Nanohydroxyapatite was etched with 0.5%HF prior to measuring its morphological and mechanical properties.
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1A
Storage Class
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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