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Sigma-Aldrich

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
EC Number:
231-634-8
MDL number:
MFCD00011346
UNSPSC Code:
12352106
PubChem Substance ID:
329761712
NACRES:
NA.21
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grade

ACS reagent

Quality Level

200

vapor density

1.27 (vs air)

vapor pressure

25 mmHg ( 20 °C)

Assay

48%

form

liquid

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

SMILES string

[H+].[F-]

InChI

1S/FH/h1H

InChI key

KRHYYFGTRYWZRS-UHFFFAOYSA-N

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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. [1] [2]

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

Signal Word

Danger

Hazard Statements

H300 + H310 + H330,H314

Hazard Classifications

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

Storage Class Code

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
MKCW0065
MKCV7071
MKCW6816
MKCW1134
MKCW1379

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Hydrofluoric acid
DW Jr S, et al.
Elsevier's Integrated Review Biochemistry (Second Edition) null
Hydrofluoric acid burns
M H, et al.
Burns : Journal of the International Society For Burn Injuries, 30, 156-159 (2004)
Highly-ordered TiO2 nanotube arrays up to 220μm in length: use in water photoelectrolysis and dye-sensitized solar cells.
Shankar K, et al.
Nanotechnology, 18(6), 065707-065707 (2007)
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
Eagleson M.
Concise Encyclopedia Chemistry, 508-508 (1994)
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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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