Title: ash
Long Title: IUPAC Gold Book - ash
DOI: 10.1351/goldbook.A00467
Status: current

Definition
The solid residue which remains after the combustion of a fuel such as coal. Ash consists largely of heat treated mineral matter, but it may contain some products of the incomplete combustion of the fuel as well.

Source
- PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2175 (https://doi.org/10.1351/pac199062112167)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/A00467/html
- json: https://goldbook.iupac.org/terms/view/A00467/json
- xml: https://goldbook.iupac.org/terms/view/A00467/xml

Citation: Citation: 'ash' 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.A00467
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Accessed: 2026-07-25T10:54:42+00:00