4-Ethylmethcathinone (4-EMC) is a recreational designer drug of the stimulant and entactogen class. It is a structural isomer of 4-MEC. It is also known as 4-Methylethcathinone. 4-EMC bears a chemical resemblance to mephedrone. It is a stimulant drug of phenethylamine, amphetamine, and cathinone chemical classes due to its similarity with mephedrone. 4-EMC appears as a crystalline powder under normal conditions. 4-ethylmethcathinone is an isomeric form of 4-MMC. It is off-white in colour and is easily dissolved in water. It should be stored at temperatures not exceeding 8° Celsius.