Structures
The cresols are phenols characterized by the presence of a methyl substituent. There are three isomeric forms, which differ in the mutual position between the methyl group and the hydroxyl group. Having all of the three isomeric forms a melting temperature close to room temperature can be present either in the form of solids or in the form of liquids: ortho-cresol appears in the form of yellow-brown crystals, meta-cresol appears as dense and viscous liquid, while para-cresol is a tough-looking solid. The mixture of the three isomers is sometimes called tricresol. Produzionemodifica wikitesto About half of the world's production of cresols comes from coal tar removal, while the rest is synthesized by methylation of phenol or by chlorotoluene hydrolysis. Notemodify wikitesto
wiki
