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Fumaric acid does not combust in a [[bomb calorimeter]] under conditions where [[maleic acid]] deflagrates smoothly. For teaching experiments designed to measure the difference in energy between the cis- and trans- isomers, a measured quantity of carbon can be ground with the subject compound and the enthalpy of combustion computed by difference.
==Major producers==
{| class="wikitable"
|-
!Company !! Location !! Capacity (KMT/Year)
|-
| Yongsan Chemicals, Inc. || South Korea || 7
|}
<small>'''''Source''': Yongsan Chemicals, Inc.''</small>
==See also==
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