455830

Ammonium hydrogen difluoride

99.999% trace metals basis

• Sinónimos: Ammonium bifluoride, Etching powder
• Fórmula lineal: NH₄HF₂
• Número de CAS: 1341-49-7
• Peso molecular: 57.04
• EC Number: 215-676-4
• MDL number: MFCD00012018
• UNSPSC Code: 12352302
• eCl@ss: 38050109
• PubChem Substance ID: 24869086
• NACRES: NA.23

Propiedades

• assay: 99.999% trace metals basis
• form: crystalline
• impurities: ≤15.0 ppm Trace Metal Analysis
• mp: 125 °C (lit.)
• SMILES string: N.F.F
• InChI: 1S/2FH.H3N/h2*1H;1H3
• InChI key: KVBCYCWRDBDGBG-UHFFFAOYSA-N

Descripción

General description

Ammonium hydrogen difluoride is a white crystalline solid commonly used as an etchant, especially in the semiconductor industry. It has excellent selectivity in etching silicon oxides and metal silicides, making it useful in the manufacturing of semiconductors and microelectronic devices. It can also be used as a fluorinating agent.

Application

Used for the preparation of ammonium aminosilylfluorides and complex metal fluorides. Employed in a new hydrothermal synthesis of complex flourides NaHoF₄ and NaEuF₄; these interesting compounds have the fluorite structure and are important for solid-state lasers as well as for photoluminescence and magnetic characteristics

Información de seguridad

• pictograms: GHS06,GHS05
• signalword: Danger
• hcodes: H301,H314
• pcodes: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Acute Tox. 3 Oral - Eye Dam. 1 - Skin Corr. 1B
• Storage Class: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges