Preservatives: Imidiazolidinyl and diazolidinyl urea

Imidiazolidinyl urea is one of the most common preservatives, found as Germall 115 (a powder). Created through a chemical reaction of allantoin and formaldehyde in the presence of a sodium hydroxide solution, it’s then neutralized with hydrochloric acid and evaporated.It’s a good anti-bacterial preservative that isn’t great with fungus, so it is generally combined with…