Agar consists of a mixture of two polysaccharides: agarose and agaropectin, with agarose making up about 70% of the mixture [REF].
Agar exhibits hysteresis, melting at 85 °C (358 K, 185 °F) and solidifying from 32-40 °C (305-313 K, 90-104 °F) [REF].