A solid decompostion product of a natural or synthetic organic material.
If the precursor has not passed through a fluid stage, char will retain the characteristic
shape of the precursor (although becoming of smaller size). For such materials the
' has been used. Some simple organic compounds, e.g. sugar, melt at an early stage
and then polymerize during carbonization
to produce chars.
PAC, 1995, 67, 473
(Recommended terminology for the description of carbon as a solid (IUPAC Recommendations
on page 484