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40276

Sigma-Aldrich

Hydrofluoric acid

semiconductor grade MOS PURANAL™ (Honeywell 17928), 49.5-50.5%

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:
57649960

grade

semiconductor grade MOS PURANAL™ (Honeywell 17928)

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

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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.

Legal Information

PURANAL is a trademark of Honeywell Specialty Chemicals Seelze GmbH

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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