can't read?
Butanone, also known as methyl ethyl ketone (MEK), is an organic compound with the formula CH3C(O)CH2CH3. This colorless liquid ketone has a sharp, sweet odor reminiscent of butterscotch and acetone.(End user certificate required)
E 1617 (OTTO) Ethyl methyl ketone, GR 99%+ Cas 78-93-3 - used in regulated and highly demanding lab applications.