What is the freezing temperature of glycerin?

The boiling point is 290 C

Not entirely,

This an accurate chart. It depends on the %

Concentration

Freezing Point Boiling Point

(% by mass, weight) (oF) (oC) (oF) (oC)

98.2% 56 13.3 554 290

95% 46 7.8 332 167

90% 29 -1.7 281 138

80% -5 -20.6 250 121

70% -38 -38.9 237 114

66.7% -51 -46.1 234 112

60% -30 -34.4 228 109

50% -9 -22.8 223 106

40% 4 -15.6 219 104

30% 15 -9.4 217 103