Title: mesogenic pitch
Long Title: IUPAC Gold Book - mesogenic pitch
DOI: 10.1351/goldbook.M03841
Status: current

Definition
A pitch with a complex mixture of numerous essentially aromatic hydrocarbons. It does not contain anisotropic particles detectable by optical microscopy. Mesogenic pitch is low in quinoline-insoluble fractions and capable of transforming into mesophase pitch during continuous heat treatment above \(750\ \rm{K}\) by the formation of optically detectable carbonaceous mesophase.

Related Terms
- carbonaceous mesophase: https://goldbook.iupac.org//terms/view/C00822
- hydrocarbons: https://goldbook.iupac.org//terms/view/H02889
- mesophase pitch: https://goldbook.iupac.org//terms/view/M03850
- pitch: https://goldbook.iupac.org//terms/view/P04677

Source
- PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 496 (https://doi.org/10.1351/pac199567030473)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/M03841/html
- json: https://goldbook.iupac.org/terms/view/M03841/json
- xml: https://goldbook.iupac.org/terms/view/M03841/xml

Citation: Citation: 'mesogenic pitch' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.M03841
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Accessed: 2026-04-19T02:45:59+00:00