Ammonium hydrogen difluoride
ALDRICH/455830 - 99.999% trace metals basis
Synonym: Ammonium bifluoride; Etching powder
CAS Number: 1341-49-7
Empirical Formula (Hill Notation): H5F2N
Molecular Weight: 57.04
EC Number: 215-676-4
MDL Number: MFCD00012018
Linear Formula: NH4HF2
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 455830-100G
This image depicts SKU: 455830-100G
| assay | 99.999% trace metals basis |
| form | crystalline |
| impurities | ≤15.0 ppm Trace Metal Analysis |
| InChI | 1S/2FH.H3N/h2*1H;1H3 |
| InChI key | KVBCYCWRDBDGBG-UHFFFAOYSA |
| mp | 125 °C (lit.) |
| SMILES string | N.F.F |
| 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 |
| 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. |
| Packaging: | 25, 100 g in poly bottle |
| Symbol |   GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H301 - H314 |
| Precautionary statements | P260 - P270 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | T,C |
| Risk Statements | 25-34 |
| Safety Statements | 22-26-37-45 |
| RIDADR | UN 1727 8 / PGII |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 99.999% trace metals basis |
| mp | 125 °C (lit.) |
| UNSPSC | 12352302 |