(1808 – 1871) was a Scottish chemist, a pharmacist who provided chloroform to Doctor (later Sir) James Young Simpson for his anaesthesia experiment at 52 Queen Street, Edinburgh on 4 November 1847.

[5] He did not practise as a surgeon, but with Duncan, worked closely with other doctors in Edinburgh on experimental drugs, which they then refined to improve in purity, following the medical experiments' results.

In his inaugural speech he highlighted the issues on unregulated production, of poisons for example, and the risks from a lack of quality controls, and thus he proposed a 'Universal Phamacopoeia for Great Britain'.

[7] Duncan and Flockhart had premises at 52 North Bridge, Edinburgh (now the Balmoral Hotel) which has a plaque to the pharmacists, dedicated in 1981, by the International Association for the Study of Pain.

Another name for it, in his time, was a 'perchloride of formyle', which had been planned by Dr. Simpson to come from David Waldie, another Scottish doctor/chemist from Linlithgow, based in Liverpool, but the laboratory suffered a fire.

[12] The firm extended to London and became the main supplier of chloroform in Britain, including to its armed forces,[9] which continued during both World Wars.

His brother Robert, a surgeon on the ship 'HMS Brisk' died of fever near Sierra Leone (aged 25); and he had previously worked with Dr Knox of Edinburgh on experiments with writer Walter Scott.

[5] Flockhart's burial site is at 58°58'10.9"N, 3°11'47.5"W in Warriston Cemetery, Edinburgh and has a memorial grey marble or granite obelisk with the inscription on the front plinth (North Face) which reads: