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Merck

695068

Hydrofluoric acid

ACS reagent, 48%

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:
329761712
UNSPSC Code:
12352106
EC Number:
231-634-8
MDL number:
MFCD00011346
Assay:
48%
Form:
liquid
Grade:
ACS reagent

Key Documents

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InChI key

KRHYYFGTRYWZRS-UHFFFAOYSA-N

InChI

1S/FH/h1H

SMILES string

[H+].[F-]

grade

ACS reagent

vapor density

1.27 (vs air)

vapor pressure

25 mmHg ( 20 °C)

assay

48%

form

liquid

Quality Level

200

impurities

≤0.5 ppm As (Arsenic), ≤0.5 ppm Pb (Lead)

density

1.15 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 ppm, phosphate (PO43-): ≤1 ppm, sulfate, sulfite (as SO42-): ≤5 ppm

cation traces

As: ≤0.05 ppm, Cu: ≤0.1 ppm, Fe: ≤1 ppm, heavy metals (as Pb): ≤0.5 ppm

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General description

Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. It is composed of hydrogen and fluoride. Hydrofluoric acid is a colorless and highly corrosive liquid. It is commonly used in the manufacture of hydrocarbons and polishing and conditioning glass. Additionally, it is used as a catalyst and in the synthesis of fluoride-containing compounds, and semiconductors.

Application

Hydrofluoric acid solution can be used as a reagent to synthesize:
  • Cyanohydrin alkyl ethers via chiral Bronsted acid-mediated hydrocyanation of vinyl ethers with silyl cyanides.
  • N, N-Dimethylaniline hydrochloride salts via Pd-catalyzed Buchwald-Hartwig amination of aryl triflates with dimethylamines.
It can also be used as a catalyst for the amidation of carboxylic acids with amines to synthesize amides.

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

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ5895
MKCZ5115
MKCX9382
MKCZ1679
MKCX9384

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Hydrofluoric acid burns
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Burns : Journal of the International Society For Burn Injuries, 30, 156-159 (2004)
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Francesca Monticelli et al.
Dental materials : official publication of the Academy of Dental Materials, 22(7), 602-609 (2005-11-18)
To verify the influence of different etching procedures of the post-surface on microtensile bond strength values between fiber posts and composite core materials. 60 DT Light Posts were divided into 10 subgroups using five different chemical surface treatments and two
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