The story
From their dark brown colour.
Etymology from Wiktionary, CC BY-SA 4.0.
mahogany acid
Today it means: Any of a group of sulfonic acids obtained by the action of sulfuric acid on petroleum fractions Full definition →
Today it means: Any of a group of sulfonic acids obtained by the action of sulfuric acid on petroleum fractions Full definition →
From their dark brown colour.
Etymology from Wiktionary, CC BY-SA 4.0.