Upper flammability limit volume percent

• Definition

  The range of flammability is classified into lower flammability limit and upper flammability limit. When flammable gas is mixed with air, the maximum density to keep it flammable is referred to as Upper Flammability Limit Volume Percent.

• Estimation Method

  - MolInstincts: The Property value is estimated by the combination of fundamental thermodynamic theories, modern modeling approaches, QSPR (quantitative structure-property relationships) methods, and ANN (Artificial Neural Network) with over fitting prevention algorithm, utilizing the quantum chemical calculations results and molecular descriptors. The estimated value is finally determined after manual inspection.

• Supplementary Explanation on Accuracy

  Comment	Meaning of Comment
  ≤ 1 vol%	0 vol% ≤ abs error ≤ 1 vol%
  ≤ 3 vol%	1 vol% < abs error ≤ 3 vol%
  ≤ 5 vol%	3 vol% < abs error ≤ 5 vol%
  ≤ 7 vol%	5 vol% < abs error ≤ 7 vol%
  > 7 vol%	abs error > 7 vol%
  Exp. Data Unavailable	Experimental Data are Unavailable

  Where absolute error means the absolute value of (experimental value)-(calculated value).