The International Chemistry Olympiad (IChO) is an annual competition for the world’s most talented chemistry students at the secondary school level. Nations around the world send a team of four students who are tested on their chemistry knowledge and skills in a five-hour laboratory practical and five-hour written theoretical examination.
The program is intended to stimulate student interest in chemistry through independent and creative solving of chemical problems. It also aims to promote international contacts in chemistry, friendships between young scientific workers of different nationalities, cooperation among pupils, and exchange of pedagogical and scientific experience in chemistry.
The idea of the International Chemistry Olympiad was developed in the former Czechoslovakia in 1968. It was designed with the aim to increase the number of international contacts and the exchange of information between nations. Invitations were sent by the Czechoslovak national committee to all socialist countries, except Romania. However, in May 1968, relations between Czechoslovakia and the Soviet Union became so delicate that only Poland and Hungary participated in the first international competition.
The first International Chemistry Olympiad took place in Prague between 18 and 21 June 1968. Each of the three participating countries sent a team of six pupils, and four theoretical tasks were to be solved. Guidelines for the next competitions were already suggested. The second chemistry Olympiad took place in 1969 in Poland, and Bulgaria also participated. Each team consisted of five pupils, and an experimental competition was added. The decision was made to invite more socialist countries to future competitions and to limit the number of pupils to four. The third Olympiad in 1970 was organized in Hungary with the German Democratic Republic (GDR), Romania and the Soviet Union as new countries. In this competition, more than three prizes were distributed to the pupils.
There was no Olympiad held in 1971, as at the end of the competition in 1970, an organizer and host for the next event could not be agreed on. This was solved for the next three years by diplomatically agreeing on the Soviet Union to host 1972, Bulgaria in 1973, and Romania in 1974. 1972 was the first time where preparation tasks for the International Chemistry Olympiad were created. Also, at a jury session, it was suggested that invitations should be sent to Vietnam, Mongolia, and Cuba. Unfortunately though, these invitations were not sent, leaving seven to compete in 1973.
In 1974, Romania invited Sweden and Yugoslavia to the Olympiad in Bucharest and Germany and Austria sent observers. The Federal Republic of Germany was the first NATO-country with an observer present and this was only able to occur because the Brandt government had contracts in the East. Thus, in 1975, West Germany, Austria, and Belgium also participated in the International Chemistry Olympiad.
The first Olympiad in a non-socialist country took place 1980 in Linz in Austria, although the Soviet Union did not participate. Since then the number of the participating countries has increased steadily. In 1980, only 13 nations took part but this number increased to 21 by the 1984 Olympiad in Frankfurt/Main. With the fall of the Iron Curtain and the break-up of the Soviet Union into independent states in the early 1990s, the number of participants increased again. In addition, the increasing interest of Asian and Latin American countries became apparent with the numbers of participants. Altogether 47 delegations participated in 1998. Presently, around 80 countries participate in the International Chemistry Olympiad.
Thailand first participated in the 22nd International Chemistry Olympiad which was held in Paris, France, during July 8-17, 1990. There were 28 delegations participated in that Olympiad. In 1999, Thailand hosted the 31st International Chemistry Olympiad which was organized by the Institute for Promotion of Teaching Science and Technology (IPST), the Chemical Society of Thailand (CST) under the patronage of Professor Dr. Her Royal Highness Princess Chulabhorn, Kasetsart University, and King Mongkut's Institute of Technology Ladkrabang. The event took place in Bangkok during July 3-12, 1999, with 51 participating countries. In addition, the 49th International Chemistry Olympiad will be held in Thailand during July 6-17, 2017. This will be the second time for Thailand to host the IChO. The organizers for the 49th IChO are the Institute for Promotion of Teaching Science and Technology (IPST), The Promotion of Academic Olympiad and Development of Science Education Foundation under the patronage of Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra (POSN), the Chemical Society of Thailand (CST) under the patronage of Professor Dr. Her Royal Highness Princess Chulabhorn, and Mahidol University. The major events for this 49th IChO will be at Mahidol University, Salaya Campus, in Nakhon Pathom.