Crystallization and Melting Behavior of Mixtures of Pure Monoacylglycerols and Diacylglycerols was written by Nicholson, Reed A.;Mazzanti, Gianfranco;Marangoni, Alejandro G.. And the article was included in Crystal Growth & Design in 2022.Quality Control of Glyceryl monostearate The following contents are mentioned in the article:
This differential scanning calorimetry survey provides a valuable exploratory map. It identifies the mixtures of pure mono- and diacylglycerols (MAGs and DAGs), proportions, and temperatures needed for planning deeper crystallog. characterizations. Monopalmitin and monostearin produced a eutectic mixture The formation of solid-solution crystals at all concentrations was observed for the mixtures of 1-monolinolein and 1-monoolein. The range of proportions at which MAGs formed solid solutions was reduced when structural differences between fatty acid moieties increased. 1-Monopalmitin formed solid solutions with 1-monoolein when less than 19.3% 1-monopalmitin was present. Addnl., low amounts of 1-monoolein ( < 10.1%) formed solid solutions with 1-monopalmitin while causing 1-monopalmitin α crystals to transition to higher melting polymorphs. The mixtures of diolein and 1-monoolein formed solid solutions up to a 1-monoolein concentration of 50% and melted sep. at greater 1-monoolein concentrations Furthermore, 1-monopalmitin formed solid solutions with diolein only when 1-monopalmitin was present below 3.7%. The formation of solid solutions was not observed between 1-monopalmitin and palmitoyl-oleoyl-glycerol. The addition of palmitoyl-oleoyl-glycerol, however, caused a polymorphic transformation in 1-monpalmitin to the β′ form. For diolein + 1-monoolein, 1-monopalmitin + 1-monoolein, and diolein + palmitoyl-oleoyl-glycerol mixtures, at low concentrations, higher-melting species always had a solid-state partial solubility in lower-melting species. At higher concentrations, it phase separated, melting as a sep. component. This study involved multiple reactions and reactants, such as Glyceryl monostearate (cas: 31566-31-1Quality Control of Glyceryl monostearate).
Glyceryl monostearate (cas: 31566-31-1) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Quality Control of Glyceryl monostearate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics