Pierre-Joseph Macquer (9 October 1718 – 15 February 1784) was an influential French chemist.

He was also involved in practical applications, to medicine and industry, such as the French development of porcelain.

He worked as a chemist in industries, such as the Manufacture de Sèvres or the Gobelins Manufactory.

[2][3] In his 1749 Elemens de Chymie Theorique, Macquer builds on Geoffroy's 1718 affinity table, by devoting a whole chapter to the topic of chemical affinity:[4] All the experiments that have been hitherto carried out, and those that are still being daily performed, concur in proving that between different bodies, whether principles or compounds, there is an agreement, relation, affinity or attraction (if you will have it so), which disposes certain bodies to unite with one another, while with others they are unable to contract any union: it is this effect, whatever be its cause, which will help us to give a reason for all the phenomena furnished by chemistry, and to tie them together.He became adjunct Chemist at the French Academy of Sciences the 5th of April 1745.

[5] In 1768, Macquer was elected a foreign member of the Royal Swedish Academy of Sciences.