4-MEC or 4-Methylethcathinone is a chemical that bears a chemical resemblance to mephedrone. Due to its similarity to mephedrone, it is thought to be a stimulant and entactogen drug of the phenethylamine, amphetamine, and cathinone chemical classes. 4-MEC is a synthetic stimulant with empathogenic effects that is chemically similar to methcathinone. Product Name: 4-mec crystals / 4-Methylethcathinone Cas No: 1225617-18-4 Formula: C12H17NO Purity: above 98.5%