https://www.cdc.gov/niosh/npg/npgd0652.html
CDC - NIOSH Pocket Guide to Chemical Hazards - n-Valeraldehyde
Amyl aldehyde, Pentanal, Valeral, Valeraldehyde, Valeric aldehyde Colorless liquid with a strong, acrid, pungent odor.
niosh pocket guidechemical hazardscdcvaleraldehyde