Ancient name. Known in China long before modern chemistry; the old character was kept. Known since ancient times
History of the character
Every form found in the sources, from the first missionary chemistry books of the 1850s to the current
standards. Hover a dot for the source. Simplified 碳, traditional 碳.
1868炭精格物入門 Géwù Rùmén, W. A. P. Martin (丁韙良), Tongwen College
1870炭精化學初階 Huàxué Chūjiē, John G. Kerr (嘉約翰) & Hé Liǎorán (何瞭然)
1871炭金石識別 Jīnshí Shíbié, D. J. MacGowan (瑪高溫) & Huà Héngfāng (華蘅芳)
1871炭化學鑑原 Huàxué Jiànyuán, Xú Shòu (徐壽) & John Fryer (傅蘭雅), Jiangnan Arsenal
1901碳tàn化學名目與命名法 Chemical Terms and Nomenclature, Educational Association of China (益智書會)炭 “charcoal” given the stone radical