succinic acid
A dicarboxylic acid found in amber and living organisms; used in food additives and chemical synthesis.
Succinic acid is one of the intermediates in the citric acid cycle.
Katakana spelling is common in chemistry contexts.
Kanji spelling using 琥珀 (amber); also used but less common in modern chemical nomenclature.
From 琥珀 (amber) + 酸 (acid), as succinic acid was originally obtained from amber.