Propofol EP Impurity N Catalogue B485434 CAS 13423-73-9 M.W 222.28 M.F C13H18O3 Specifications FAQs 4-hydroxy-3,5-bis(1-methylethyl)benzoic acid; 4-hydroxy-3,5-diisopropylbenzoic acid; Propofol 4-Carboxylic Acid