thermolabile
adjective
ther·mo·la·bile
| \ ˌthər-mō-ˈlā-ˌbī(-ə)l
, -bəl\
, -bəl\
Definition of thermolabile
: unstable when heated
specifically
: subject to loss of characteristic properties on being heated to or above 55°C (131°F)
many immune bodies, enzymes, and vitamins are thermolabile