Samuel Benjamin Cnoll (1705 – 1767) was a German physician who worked in the Halle mission to Tranquebar.
Cnoll studied medicine at Halle and joined the Danish-Halle mission around 1732 and went to Tranquebar where he succeeded Dr Caspar Schlegelmilch who died just two months into his work.
He took an interest in borax which was a substance exported from India and published a description in Acta Medica Hafniensis.
Cnoll also sought to make use of the Hortus Malabaricus but received no copy and had to work with other botanical sources.
Cnoll was a member of the Royal Prussian Academy of Sciences in Berlin, possibly thanks to Johann Heinrich Pott who had a special interest in borax.