Trace Secondary Amine Impurities Causing Yellowing in Transparent Alcohol-Based Gels
When formulating transparent alcohol-based gels, the presence of trace secondary amine byproducts in N-(3-Aminopropyl)-N-dodecyl-1,3-propanediamine (CAS: 2372-82-9) is a primary driver of oxidative yellowing. During the alkylation of propane-1,3-diamine with dodecyl halides, incomplete substitution leaves residual secondary amine structures. These moieties are highly susceptible to
