In the present work we investigated the glyceride and sterol compositi
ons of Astrocatyum macrocalyx (''huicungo'') kernel fat. This species
is native from the Peruvian Amazonia (lquitos). Gas chromatographic an
alysis of the fatty acids revealed 8 components, among which lauric (5
4.5%) and myristic (21.9%) acids predominate. The sterol profile is cl
assic; beta-sitosterol and campesterol are the main constituents (74.3
and 12.0% respectively) while the Delta(7)-sterols were detected in m
inute amounts. X-ray diffraction measurements showed that Astrocaryum
macrocalyx kernel fat is stabilized in the beta(1)'-2 polymorphic form
at ambiant temperature.