Vitriol is the general

chemical A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combin ...

name encompassing a class of

chemical compound A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...

s comprising

sulfate The sulfate or sulphate ion is a polyatomic anion with the empirical formula . Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many ...

s of certain metalsoriginally,

iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...

copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...

. Those mineral substances were distinguished by their color, such as green vitriol for hydrated

iron(II) sulfate Iron(II) sulfate or ferrous sulfate (British English: sulphate instead of sulfate) denotes a range of salts with the formula Fe SO4·''x''H2O. These compounds exist most commonly as the heptahydrate (''x'' = 7), but several values for ...

and blue vitriol for hydrated

copper(II) sulfate Copper(II) sulfate is an inorganic compound with the chemical formula . It forms hydrates , where ''n'' can range from 1 to 7. The pentahydrate (''n'' = 5), a bright blue crystal, is the most commonly encountered hydrate of copper(II) sulfate, whi ...

.Vitriol
entry in the online Encyclopaedia Britannica. Accessed on 2020-08-28. These materials were found originally as crystals formed by evaporation of groundwater that percolated through

sulfide Sulfide (also sulphide in British English) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. Solutions of sulfide salts are corrosive. ''Sulfide'' also refers to large families o ...

minerals and collected in pools on the floors of old

mine Mine, mines, miners or mining may refer to: Extraction or digging *Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun M ...

s. The word ''vitriol'' comes from the Latin word ''vitriolus'', meaning "small glass", as those crystals resembled small pieces of colored glass. Oil of vitriol was an old name for concentrated

sulfuric acid Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (English in the Commonwealth of Nations, Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, ...

, which was historically obtained through the dry distillation (

pyrolysis Pyrolysis is a process involving the Bond cleavage, separation of covalent bonds in organic matter by thermal decomposition within an Chemically inert, inert environment without oxygen. Etymology The word ''pyrolysis'' is coined from the Gree ...

) of vitriols. The name, abbreviated to vitriol, continued to be used for this viscous liquid long after the minerals came to be termed "sulfates". The figurative term ''vitriolic'' in the sense of "harshly condemnatory" is derived from the corrosive nature of this substance.

History

The study of vitriol began during

ancient times Ancient history is a time period from the History of writing, beginning of writing and recorded human history through late antiquity. The span of recorded history is roughly 5,000 years, beginning with the development of Sumerian language, ...

Sumer Sumer () is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and Early Bronze Age, early Bronze Ages between the sixth and fifth millennium BC. ...

ians had a list of types of vitriol that they classified according to the substances' color. Some of the earliest discussions of the origin and properties of vitriol is in the works of the Greek physician

Dioscorides Pedanius Dioscorides (, ; 40–90 AD), "the father of pharmacognosy", was a Greek physician, pharmacologist, botanist, and author of (in the original , , both meaning "On Materia medica, Medical Material") , a 5-volume Greek encyclopedic phar ...

(first century AD) and the Roman naturalist

Pliny the Elder Gaius Plinius Secundus (AD 23/24 79), known in English as Pliny the Elder ( ), was a Roman Empire, Roman author, Natural history, naturalist, and naval and army commander of the early Roman Empire, and a friend of the Roman emperor, emperor Vesp ...

(23–79 AD).

Galen Aelius Galenus or Claudius Galenus (; September 129 – AD), often Anglicization, anglicized as Galen () or Galen of Pergamon, was a Ancient Rome, Roman and Greeks, Greek physician, surgeon, and Philosophy, philosopher. Considered to be one o ...

also discussed its medical use. Metallurgical uses for vitriolic substances were recorded in the Hellenistic alchemical works of

Zosimos of Panopolis Zosimos of Panopolis (; also known by the Latin name Zosimus Alchemista, i.e. "Zosimus the Alchemist") was an alchemist and Gnostic mystic. He was born in Panopolis (present day Akhmim, in the south of Roman Egypt), and likely flourished ca. 3 ...

, in the treatise ''Phisica et Mystica'', and the

Leyden papyrus X The Leyden papyrus X (P. Leyden X) is a papyrus codex written in Greek at about the end of the 3rd century A.D.E.R.Caley, ''The Leyden Paprus X: An English Translation with Brief Notes''p.1149 "These two papyri have, however, upon the basis of unque ...

. Medieval Islamic chemists like Jābir ibn Ḥayyān (died c. 806–816 AD, known in Latin as Geber), Abū Bakr al-Rāzī (865–925 AD, known in Latin as Rhazes),

Ibn Sina Ibn Sina ( – 22 June 1037), commonly known in the West as Avicenna ( ), was a preeminent philosopher and physician of the Muslim world, flourishing during the Islamic Golden Age, serving in the courts of various Iranian peoples, Iranian ...

(980–1037 AD, known in Latin as Avicenna), and Muḥammad ibn Ibrāhīm al-Watwat (1234–1318 AD) included vitriol in their mineral classification lists. Sulfuric acid was termed "oil of vitriol" by medieval European alchemists because it was prepared by roasting "green vitriol" (

) in an iron

retort In a chemistry laboratory, a retort is a device used for distillation or dry distillation of substances. It consists of a sphere, spherical vessel with a long downward-pointing neck. The liquid to be distilled is placed in the vessel and heat ...

. The first vague allusions to it appear in the works of

Vincent of Beauvais Vincent of Beauvais ( or ; ; c. 1264) was a Dominican friar at the Cistercian monastery of Royaumont Abbey, France. He is known mostly for his '' Speculum Maius'' (''Great mirror''), a major work of compilation that was widely read in the Middl ...

, in the ''Compositum de Compositis'' ascribed to Saint

Albertus Magnus Albertus Magnus ( 1200 – 15 November 1280), also known as Saint Albert the Great, Albert of Swabia, Albert von Bollstadt, or Albert of Cologne, was a German Dominican friar, philosopher, scientist, and bishop, considered one of the great ...

, and in

pseudo-Geber Pseudo-Geber (or "Middle Latin, Latin pseudo-Geber") is the presumed author or group of authors responsible for a corpus of pseudepigraphic alchemical writings dating to the late 13th and early 14th centuries. These writings were falsely attrib ...

's ''Summa perfectionis'' (all thirteenth century AD)..

References

{{Authority control Sulfuric acid