relative density, d

https://doi.org/10.1351/goldbook.R05262
Ratio of density to a reference density, usually the density of water at 4 ⚬C; in the older literature this is called specific gravity.
Sources:
Green Book, 2nd ed., p. 12 [Terms] [Book]
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2210 [Terms] [Paper]
See also:
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 990 [Terms] [Paper]
Citation: 'relative density' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05262 RIS BibTex EndNote
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