Difluoroacetic acid
SUPELCO/00922 - for LC-MS LiChropur™, ≥97.5% (GC)
Synonym: DFA
CAS Number: 381-73-7
Empirical Formula (Hill Notation): C2H2F2O2
Molecular Weight: 96.03
MDL Number: MFCD00004220
Linear Formula: F2CHCO2H
Product Type: Chemical
| assay | ≥97.5% (GC) |
| 97.5-102.5% (T) | |
| bp | 132-134 °C (lit.) |
| cation traces | Al: ≤5 ppm |
| Ca: ≤20 ppm | |
| Cu: ≤5 ppm | |
| Fe: ≤2 ppm | |
| K: ≤50 ppm | |
| Mg: ≤5 ppm | |
| Na: ≤50 ppm | |
| density | 1.526 g/mL at 25 °C (lit.) |
| InChI | 1S/C2H2F2O2/c3-1(4)2(5)6/ |
| InChI key | PBWZKZYHONABLN-UHFFFAOYSA |
| mp | −1 °C (lit.) |
| refractive index | n |
| SMILES string | OC(=O)C(F)F |
| suitability | passes test for LC-MS |
| technique(s) | LC/MS: suitable |
| General description: | Compared to trifluoroacetic acid (TFA), difluoroacetic acid (DFA) exhibits an improved sensitivity in mass spectral detection (ESI) as it has a reduced effect on ion suppression in reversed-phase liquid chromatography (RPLC-MS), while keeping its strong chromatographic performance enhancing effects. |
| Legal Information: | LiChropur is a trademark of Merck KGaA, Darmstadt, Germany |
| Recommended products: | Discover LiChropur™ reagents ideal for HPLC  or LC-MS analysis |
| Symbol |  GHS05 |
| Signal word | Danger |
| Hazard statements | H314 |
| Precautionary statements | P280 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 |
| WGK Germany | WGK 3 |
| Flash Point(F) | 172.4 °F - closed cup |
| Flash Point(C) | 78 °C - closed cup |
| Purity | ≥97.5% (GC); 97.5-102.5% (T) |
| bp | 132-134 °C (lit.) |
| mp | −1 °C (lit.) |
| Density | 1.526 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 41116004 |