Mixture of 4, 4'-methylenebisphenol (27-31 wt. %), 2, 4’-methylenebisphenol (44-48 wt. %), 2, 2’-methylenebisphenol (15-18 wt. %) and phenol formaldehyde resin (9-11 wt. %). Acts as a bisphenol-F monomer. It is an aromatic phenol. Offers an excellent mechanical property, reactivity as well as handling. Also has a lower viscosity than bisphenol-A. Used in an epoxy resins applications.