40 CFR § 63.61
Deletion of methyl ethyl ketone from the list of hazardous air pollutants
June 9, 2020
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]
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