Characterization
A substance is characterized through burn rate vs pressure chart and burn rate vs temperature chart.
- Greater than 1,138 feet per second (347 m/s): "detonation"
- A few meters per second: "deflagration"
- A few centimeters per second: "burn" or "smolder"
- 0.01 mm/s to 100 mm/s: "decomposing rapidly" to characterize it.
However, there is difference in opinion in differentiating the three in absence of firm numbers at given pressure or temperature.
Read more about this topic: Burn Rate (chemistry)