1-BUTANOL, 4-(PROPYLNITROSAMINO)- 4-(Propylnitrosamino)-1-butanol 51938-12-6 BRN 2242992 CCRIS 1253 N-Nitroso-n-propyl-(4-hydroxybutyl)amine N-Propyl-N-(4-hydroxybutyl)nitrosamine PHBN Propyl(4-hydroxybutyl)nitrosamine