Chemical name: Methyl benzoylformate CAS No.: 15206-55-0 Molecular formula:C9H8O3 Molecular weight: 164 Appearance: Slight yellow liquid Purity, %: 99min. Melting point, degree: 17 Density at 20 degree: 1.162 g/cm3 Photoinitiator MBF is a versatile highly efficient free radical type I non-yellowing liquid photoinitiator with an absorption maximum at 244 nm. It is used to initiate the UV polymerization of chemically unsaturated prepolymers (e.g. acrylates) in combination with mono- or multi-functional vinyl monomers and oligomers.