339261

Hydrofluoric acid

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

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

Properties

• vapor density: 1.27 (vs air); 1.27 (vs air)
• Quality Level: 200
• 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.)
• SMILES string: [H+].[F-]
• InChI: 1S/FH/h1H
• InChI key: KRHYYFGTRYWZRS-UHFFFAOYSA-N

Description

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.

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.

Packaging

100, 100, 100, 800, 800 mL

Safety Information

• Pictograms: GHS05,GHS06
• Signal Word: Danger
• Hazard Statements: H300 + H310 + H330 - H314
• Precautionary Statements: P260 - P270 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Eye Dam. 1 - Skin Corr. 1A
• Storage Class Code: 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