R-(-)-o-formyl mandeloylchloride (fmc) Chemical name: r-(-)-o-formyl mandeloylchloride Molecular formula: c9h7clo3 Molecular weight: 198.61 Cas no.: 29169-64-0 Appearance: colorless or light yellow clear liquid Assay: not less than 99% Specific optical rotation [a]d20¡æ: -173¡ã--175¡ã Usage: cefamandole and cefonicid intermediates 166-200kg/nylon drum