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Merck
CN

339261

Hydrofluoric acid

48 wt. % in H2O, ≥99.99% trace metals basis

Synonym(s):

HF

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About This Item

Empirical Formula (Hill Notation):
HF
CAS Number:
7664-39-3
Molecular Weight:
20.01
NACRES:
NA.21
PubChem Substance ID:
329754538
UNSPSC Code:
12352106
MDL number:
MFCD00011346

Key Documents

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Product Name

Hydrofluoric acid, 48 wt. % in H2O, ≥99.99% trace metals basis

InChI

1S/FH/h1H

SMILES string

[H+].[F-]

InChI key

KRHYYFGTRYWZRS-UHFFFAOYSA-N

vapor density

1.27 (vs air)
1.27 (vs air)

vapor pressure

25 mmHg ( 20 °C)

assay

≥99.99% trace metals basis

form

liquid

concentration

48 wt. % in H2O

density

1.15 g/mL at 25 °C (lit.)

Quality Level

200

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Application

Hydrofluoric acid is used:
  • To compose the electrolyte for the synthesis of TiO2 nanotube arrays.
  • As etchant for the glass fibers.
  • As capping reagent for the synthesis of anatase TiO2 nanocrystals/nanosheets.

General description

Hydrofluoric acid (HF) is the 48% solution of HF in water. It is weakly acidic in nature. Aqueous HF is mostly used in etching silicon in semiconductors and producing inorganic fluoride compounds. HF can also be used as fluorinating and deprotecting agent. As fluorination agent it also forms complexes with organic bases.

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1A

Storage Class

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ2842
MKCX0750
MKCX1204
MKCW5246
MKCV8964

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