Solid phenolic resin hi yellow, transparent, amorphous mass substance a ni a, a chhan chu free phenol leh reddish a awm avangin, entity specific gravity average chu 1.7 vel a ni a, zu-ah a inthiar thei a, tuiah a inthiar thei lo a, tuiah a stable a, acid chak lo tak a ni a, alkali solution chak lo tak a ni. Phenol leh formaldehyde polycondensation hmanga siam resin, neutralization leh catalyst condition hnuaia tui silfai. Catalyst hrang hrang thlan chhuah avang hian chi hnih ah then theih a ni a, chungte chu thermosetting leh thermoplastic te an ni. Phenolic resin hian acid resistance tha tak, mechanical property leh heat resistance tha tak a nei a, anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel siamna leh industry dang dangah te hman a ni nasa hle.