Wilhelm Heinrich Heintz (4 November 1817 – 1 December 1880) was a German structural

chemist A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe th ...

from

Berlin Berlin ( , ) is the capital and largest city of Germany by both area and population. Its 3.7 million inhabitants make it the European Union's most populous city, according to population within city limits. One of Germany's sixteen constitue ...

. He initially trained and worked as a

pharmacist A pharmacist, also known as a chemist (Commonwealth English) or a druggist (North American and, archaically, Commonwealth English), is a healthcare professional who prepares, controls and distributes medicines and provides advice and instructi ...

, from 1841 he studied sciences at the

University of Berlin Humboldt-Universität zu Berlin (german: Humboldt-Universität zu Berlin, abbreviated HU Berlin) is a German public research university in the central borough of Mitte in Berlin. It was established by Frederick William III on the initiative o ...

. He earned his PhD at Berlin in 1844 under

Heinrich Rose Heinrich Rose (6 August 1795 – 27 January 1864) was a German mineralogist and analytical chemist. He was the brother of the mineralogist Gustav Rose and a son of Valentin Rose. Rose's early works on phosphorescence were noted in the Quarter ...

, and two years later, obtained his

habilitation Habilitation is the highest university degree, or the procedure by which it is achieved, in many European countries. The candidate fulfills a university's set criteria of excellence in research, teaching and further education, usually including a ...

in chemistry. In 1850 he became an associate professor at the

University of Halle Martin Luther University of Halle-Wittenberg (german: Martin-Luther-Universität Halle-Wittenberg), also referred to as MLU, is a public, research-oriented university in the cities of Halle and Wittenberg and the largest and oldest university i ...

, where in 1855 he attained a full professorship.Heinrich Wilhelm Heintz
Catalogus Professorum Halensis He was one of six founding members of the

Deutsche Physikalische Gesellschaft The German Physical Society (German: , DPG) is the oldest organisation of physicists. The DPG's worldwide membership is cited as 60,547, as of 2019, making it the largest physics society in the world. It holds an annual conference () and multiple ...

and the only chemist. At Halle, Heintz supervised

Johannes Wislicenus Johannes Wislicenus (24 June 1835 – 5 December 1902) was a German chemist, most famous for his work in early stereochemistry. Biography The son of the radical Protestant theologian Gustav Wislicenus, Johannes was born on 24 June 1835 in Kle ...

's Ph.D. work, although Wislicenus' ''pro forma'' advisor at Zurich was Georg Karl Andreas Städeler. With Christoph Gottfried Giebel, he was editor of the ''Zeitschrift für Naturwissenschaften''. In 1853 he analyzed

margaric acid Margaric acid, or heptadecanoic acid, is a saturated fatty acid. Its molecular formula is CH3(CH2)15CO2H. Classified as an odd-chain fatty acid, it occurs as a trace component of the fat and milkfat of ruminants. Salts and esters of margaric acid ...

as simply a combination of

stearic acid Stearic acid ( , ) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a waxy solid and its chemical formula is C17H35CO2H. Its name comes from the Greek word στέαρ "''stéar''", which means tallow. ...

and

palmitic acid Palmitic acid (hexadecanoic acid in IUPAC nomenclature) is a fatty acid with a 16-carbon chain. It is the most common saturated fatty acid found in animals, plants and microorganisms.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra. The Li ...

. He also conducted analysis of

uric acid Uric acid is a heterocyclic compound of carbon, nitrogen, oxygen, and hydrogen with the formula C5H4N4O3. It forms ions and salts known as urates and acid urates, such as ammonium acid urate. Uric acid is a product of the metabolic breakdown of ...

urea Urea, also known as carbamide, is an organic compound with chemical formula . This amide has two amino groups (–) joined by a carbonyl functional group (–C(=O)–). It is thus the simplest amide of carbamic acid. Urea serves an important r ...

, created methods for the analysis of

nitrogen Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at se ...

organic compounds In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The s ...

, and studied

chemical reactions A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking ...

chloroacetic acid Chloroacetic acid, industrially known as monochloroacetic acid (MCA), is the organochlorine compound with the formula ClCH2CO2H. This carboxylic acid is a useful building block in organic synthesis. It is a colorless solid. Related compounds ...

and the reaction of

acetone Acetone (2-propanone or dimethyl ketone), is an organic compound with the formula . It is the simplest and smallest ketone (). It is a colorless, highly volatile and flammable liquid with a characteristic pungent odour. Acetone is miscib ...

with

amines In chemistry, amines (, ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (), wherein one or more hydrogen atoms have been replaced by a substituent such ...

. In addition he performed chemical investigations of

uranium Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weak ...

bismuth Bismuth is a chemical element with the Symbol (chemistry), symbol Bi and atomic number 83. It is a post-transition metal and one of the pnictogens, with chemical properties resembling its lighter group 15 siblings arsenic and antimony. Elemental ...

cesium Caesium (IUPAC spelling) (or cesium in American English) is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of , which makes it one of only five elemental metals that ar ...

rubidium Rubidium is the chemical element with the symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. Rubidium is the first alkali metal in the group to have a density higher ...

and metal

phosphates In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid . The phosphate or orthophosphate ion is derived from phosph ...

. The mineral heintzite is named for him.

Published works

* ''Ueber den färbenden Bestandtheil des Feuersteins, Carneols und Amethystes''. In: Annalen der Physik und Chemie. Band 136, Johann Ambrosius Barth, Leipzig 1843, S. 519–527 – the coloring constituent of

flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and start fir ...

carnelian Carnelian (also spelled cornelian) is a brownish-red mineral commonly used as a semi-precious gemstone. Similar to carnelian is sard, which is generally harder and darker (the difference is not rigidly defined, and the two names are often use ...

s and

amethyst Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος ''amethystos'' from α- ''a-'', "not" and μεθύσκω (Ancient Greek) / μεθώ (Modern Greek), "intoxicate", a reference to the belief that t ...

s. * ''Untersuchung einiger Verbindungen des Wismuths, besonders in Rücksicht der Zusammensetzung des Wismuthoxyds''. In: Annalen der Physik und Chemie. Band 139, Johann Ambrosius Barth, Leipzig 1844, S. 55–95 – Investigation of some compounds of

, especially in consideration of the composition of

bismuth oxide Bismuth(III) oxide is perhaps the most industrially important compound of bismuth. It is also a common starting point for bismuth chemistry. It is found naturally as the mineral bismite (monoclinic) and sphaerobismoite (tetragonal, much more rare) ...

s. * ''De acido saccharico ejusqe saiibus''. (dissertation), Berlin 1844. * ''Lehrbuch der Zoochemie''. Georg Reimer, Berlin 1853 – Textbook of zoochemistry. * ''Drei neue absolut isomere Körper, das Aethylglycolamid, Aethyglycocoll und Aethoxacetamid''. In: Zeitschrift für die Gesammten Naturwissenschaften. 23. Band, Wiegandt & Hempel, Berlin 1864, S. 89–107 – Three new absolute

isomer In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae – that is, same number of atoms of each element – but distinct arrangements of atoms in space. Isomerism is existence or possibility of isomers. Iso ...

bodies; ethyl glycolamide, ethyl glycocoll and ethoxyacetamide.Wilhelm Heinrich Heintz
de.Wikisource

References

* Partington, J. R. "A History of Chemistry"; Macmillan: 1964; vol 4, page 359. * ''Nature'' (1881), vol 23, pages 245-246. * ''Chem. Ber''. (1883), vol 16, pages 3121-3140. * ''Poggendorff'' I: pages 1051-52 * ''Lehrbuch der Zoochemie''. Berlin: Druck und Verlag von Georg Reimer, (1853)

External links

Academic genealogy
*

The Quiet Revolution
{{DEFAULTSORT:Heintz, Wilhelm Heinrich 1817 births 1880 deaths 19th-century German chemists Scientists from Berlin University of Halle faculty Humboldt University of Berlin alumni