CFR /  Title 40  /  Part 63  /  Sec. 63.61 Deletion of methyl ethyl ketone from the list of hazardous

The substance methyl ethyl ketone (MEK, 2-Butanone) (CAS Number 78-93-3) is deleted from the list of hazardous air pollutants established by 42 U.S.C. 7412(b)(1). [70 FR 75059, Dec. 19, 2005]