Classification of flammable dust according to the self-ignition temperature of dusts

Dust Typical self-ignition temperatures (°C) - Mist Typical self-ignition temperatures (°C) - Layer
Aluminium 590 > 450
Coal dust 380 225
Flour 490 340
Wheat dust 510 300
Methyl cellulose 420 320
Phenolic resin 530 > 450
Polythene 420 Some grains
PVC 700 > 450
Soot 810 570
Starch 460 435
Sugar 490 460