The International Union of Pure and Applied Chemistry (IUPAC ) is an international federation of National Adhering Organizations working for the advancement of the chemical sciences, especially by developing nomenclature and terminology. It is a member of the

International Science Council The International Science Council (ISC) is an international non-governmental organization that unites scientific bodies at various levels across the social and natural sciences. The ISC was formed with its inaugural general assembly on 4 July 201 ...

(ISC). IUPAC is registered in

Zürich , neighboring_municipalities = Adliswil, Dübendorf, Fällanden, Kilchberg, Maur, Oberengstringen, Opfikon, Regensdorf, Rümlang, Schlieren, Stallikon, Uitikon, Urdorf, Wallisellen, Zollikon , twintowns = Kunming, San Francisco Zürich () i ...

, Switzerland, and the administrative office, known as the "IUPAC Secretariat", is in Research Triangle Park,

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia a ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

. This administrative office is headed by IUPAC's executive director, currently Lynn Soby. IUPAC was established in 1919 as the successor of the International Congress of Applied Chemistry for the advancement of chemistry. Its members, the National Adhering Organizations, can be national

chemistry societies Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that make up matter to the compounds made of atoms, molecules and ions: their composition, structure, properties, ...

, national academies of sciences, or other bodies representing chemists. There are fifty-four National Adhering Organizations and three Associate National Adhering Organizations. IUPAC's Inter-divisional Committee on Nomenclature and Symbols ( IUPAC nomenclature) is the recognized world authority in developing standards for the naming of the chemical elements and compounds. Since its creation, IUPAC has been run by many different committees with different responsibilities.IUPAC Committees list
Retrieved 15 April 2010 These committees run different projects which include standardizing nomenclature,Interdivisional Committee on Terminology web page
Retrieved 15 April 2010 finding ways to bring chemistry to the world,Chemdrawn
Retrieved 15 April 2010 and publishing works.Pure and Applied Chemistry Editorial Advisory Board web page
Retrieved 15 April 2010Evaluation Committee page
Retrieved 15 April 2010 IUPAC is best known for its works standardizing nomenclature in chemistry, but IUPAC has publications in many science fields including chemistry, biology and physics. Some important work IUPAC has done in these fields includes standardizing

nucleotide Nucleotides are organic molecules consisting of a nucleoside and a phosphate. They serve as monomeric units of the nucleic acid polymers – deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecul ...

base sequence code names; publishing books for environmental scientists, chemists, and physicists; and improving education in science.IYC: Introduction.
9 July 2009. Retrieved on 17 February 2010. Retrieved 15 April 2010 IUPAC is also known for standardizing the atomic weights of the elements through one of its oldest standing committees, the Commission on Isotopic Abundances and Atomic Weights (CIAAW).

Creation and history

The need for an international standard for chemistry was first addressed in 1860 by a committee headed by German scientist Friedrich August Kekulé von Stradonitz. This

committee A committee or commission is a body of one or more persons subordinate to a deliberative assembly. A committee is not itself considered to be a form of assembly. Usually, the assembly sends matters into a committee as a way to explore them more ...

was the first international conference to create an international naming system for

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 ...

. The ideas that were formulated in that conference evolved into the official IUPAC nomenclature of organic chemistry. IUPAC stands as a legacy of this meeting, making it one of the most important historical international collaborations of

. Since this time, IUPAC has been the official organization held with the responsibility of updating and maintaining official

organic nomenclature In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC). It is published in the ''Nomenclature of Org ...

. IUPAC as such was established in 1919. One notable country excluded from this early IUPAC is Germany. Germany's exclusion was a result of prejudice towards Germans by the Allied powers after

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...

. Germany was finally admitted into IUPAC during 1929. However,

Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

was removed from IUPAC during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

. During World War II, IUPAC was affiliated with the Allied powers, but had little involvement during the war effort itself. After the war, East and

West Germany West Germany is the colloquial term used to indicate the Federal Republic of Germany (FRG; german: Bundesrepublik Deutschland , BRD) between its formation on 23 May 1949 and the German reunification through the accession of East Germany on 3 O ...

were readmitted to IUPAC in 1973. Since World War II, IUPAC has been focused on standardizing nomenclature and methods in science without interruption. In 2016, IUPAC denounced the use of

chlorine Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is ...

as a chemical weapon. The organization pointed out their concerns in a letter to Ahmet Üzümcü, the director of the Organisation for the Prohibition of Chemical Weapons (OPCW), in regards to the practice of utilizing chlorine for weapon usage in Syria among other locations. The letter stated, "Our organizations deplore the use of chlorine in this manner. The indiscriminate attacks, possibly carried out by a member state of the Chemical Weapons Convention (CWC), is of concern to chemical scientists and engineers around the globe and we stand ready to support your mission of implementing the CWC." According to the CWC, "the use, stockpiling, distribution, development or storage of any chemical weapons is forbidden by any of the 192 state party signatories."

Committees and governance

IUPAC is governed by several committees that all have different responsibilities. The committees are as follows: Bureau, CHEMRAWN (Chem Research Applied to World Needs) Committee, Committee on Chemistry Education, Committee on Chemistry and Industry, Committee on Printed and Electronic Publications, Evaluation Committee, Executive Committee, Finance Committee, Interdivisional Committee on Terminology, Nomenclature and Symbols, Project Committee, and Pure and Applied Chemistry Editorial Advisory Board. Each committee is made up of members of different National Adhering Organizations from different countries. The steering committee hierarchy for IUPAC is as follows:IUPAC Project Committee
Retrieved 15 April 2010 * All committees have an allotted budget to which they must adhere. * Any committee may start a project. * If a project's spending becomes too much for a committee to continue funding, it must take the issue to the Project Committee. * The project committee either increases the budget or decides on an external funding plan. * The Bureau and Executive Committee oversee operations of the other committees.

Nomenclature

IUPAC committee has a long history of officially naming organic and

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemi ...

s. IUPAC nomenclature is developed so that any compound can be named under one set of standardized rules to avoid duplicate names. The first publication on IUPAC nomenclature of organic compounds was ''A Guide to IUPAC Nomenclature of Organic Compounds'' in 1900, which contained information from the International Congress of Applied Chemistry.IUPAC Publications List
Retrieved 15 April 2010

Basic spellings

IUPAC establishes rules for harmonized spelling of some chemicals to reduce variation among different local English-language variants. For example, they recommend "

aluminium Aluminium (aluminum in AmE, American and CanE, Canadian English) is a chemical element with the Symbol (chemistry), symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately o ...

" rather than "aluminum", "

sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formul ...

" rather than "sulphur", and "

caesium 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 ...

" rather than "cesium".

Organic nomenclature

IUPAC organic nomenclature has three basic parts: the substituents, carbon chain length, and chemical affix. The substituents are any functional groups attached to the main carbon chain. The main carbon chain is the longest possible continuous chain. The chemical affix denotes what type of molecule it is. For example, the ending ''ane'' denotes a single bonded carbon chain, as in "hexane" (). Another example of IUPAC organic nomenclature is cyclohexanol: Cyclohexanol acsv

* The substituent name for a ring compound is ''cyclo''. * The indication (substituent name) for a six carbon chain is ''hex''. * The chemical ending for a single bonded carbon chain is ''ane''. * The chemical ending for an alcohol is ''ol''. * The two chemical endings are combined for an ending of ''anol'' indicating a single bonded carbon chain with an alcohol attached to it.

Inorganic nomenclature

Basic IUPAC inorganic nomenclature has two main parts: the

cation An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conve ...

and the

anion An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conve ...

. The cation is the name for the positively charged ion and the anion is the name for the negatively charged ion. An example of IUPAC nomenclature of inorganic chemistry is potassium chlorate (KClO₃): Potassium-chlorate-composition

* "

Potassium Potassium is the chemical element with the symbol K (from Neo-Latin '' kalium'') and atomic number19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmosp ...

" is the cation name. * " Chlorate" is the anion name.

Amino acid and nucleotide base codes

IUPAC also has a system for giving codes to identify

amino acid Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha ...

s and

bases. IUPAC needed a coding system that represented long sequences of amino acids. This would allow for these sequences to be compared to try to find homologies.Amino Acid Codes
Retrieved 15 April 2010 These codes can consist of either a one-letter code or a three-letter code. These codes make it easier and shorter to write down the amino acid sequences that make up

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respon ...

s. The nucleotide bases are made up of purines ( adenine and

guanine Guanine () (symbol G or Gua) is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine ( uracil in RNA). In DNA, guanine is paired with cytosine. The guanine nucleoside is c ...

) and pyrimidines (

cytosine Cytosine () (symbol C or Cyt) is one of the four nucleobases found in DNA and RNA, along with adenine, guanine, and thymine ( uracil in RNA). It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached ...

and thymine or uracil). These nucleotide bases make up DNA and

RNA Ribonucleic acid (RNA) is a polymeric molecule essential in various biological roles in coding, decoding, regulation and expression of genes. RNA and deoxyribonucleic acid ( DNA) are nucleic acids. Along with lipids, proteins, and carbohydra ...

. These nucleotide base codes make the genome of an organism much smaller and easier to read.Amino Acid and Nucleotide Base Codes
Retrieved 15 April 2010 The codes for amino acids (24 amino acids and three special codes) are:

Publications

Non-series books

''Experimental Thermodynamics'' book series

The ''Experimental Thermodynamics'' books series covers many topics in the fields of thermodynamics.

Series of books on analytical and physical chemistry of environmental systems

Colored cover book and website series (nomenclature)

IUPAC color code their books in order to make each publication distinguishable.

International Year of Chemistry

IUPAC and

UNESCO The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations (UN) aimed at promoting world peace and security through international cooperation in education, arts, sciences and culture. I ...

were the lead organizations coordinating events for the International Year of Chemistry, which took place in 2011.United Nations Resolution 63/209: International Year of Chemistry.
3 February 2009. Retrieved on 24 April 2010.About IYC: Introduction.
9 July 2009. Retrieved on 24 April 2010. The International Year of Chemistry was originally proposed by IUPAC at the general assembly in

Turin Turin ( , Piedmontese: ; it, Torino ) is a city and an important business and cultural centre in Northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. Th ...

, Italy. This motion was adopted by UNESCO at a meeting in 2008. The main objectives of the International Year of Chemistry were to increase public appreciation of chemistry and gain more interest in the world of chemistry. This event is also being held to encourage young people to get involved and contribute to chemistry. A further reason for this event being held is to honour how chemistry has made improvements to everyone's way of life.

IUPAC Presidents

IUPAC Presidents are elected by the IUPAC Council during the General Assembly. Below is the list of IUPAC Presidents since its inception in 1919.

References

External links

* {{Authority control Chemical nomenclature Chemistry organizations International scientific organizations Members of the International Council for Science Organisations based in Zürich Organizations based in North Carolina Scientific organizations based in the United States Scientific organisations based in Switzerland Scientific organizations established in 1919 Standards organisations in Switzerland Members of the International Science Council