TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
EXOTHERMIC DECOMPOSITION [4 records]
Record 1 - internal organization data 2011-08-15
Record 1, English
Record 1, Subject field(s)
- Chemical Elements and Compounds
Record 1, Main entry term, English
- organic peroxide
1, record 1, English, organic%20peroxide
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Organic peroxides : Organic substances which contain the bivalent-O-O-structure and may be considered derivatives of hydrogen peroxide, where one or both of the hydrogen atoms have been replaced by organic radicals. Organic peroxides are thermally unstable substances, which may undergo exothermic self-accelerating decomposition. 2, record 1, English, - organic%20peroxide
Record 1, Key term(s)
- organic peroxides
Record 1, French
Record 1, Domaine(s)
- Éléments et composés chimiques
Record 1, Main entry term, French
- peroxyde organique
1, record 1, French, peroxyde%20organique
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Peroxydes organiques. Ce sont des composés par la fonction -O-O- et que l'on peut considérer comme des dérivés de l'eau oxygénée dans laquelle un ou les deux atomes d'hydrogène sont remplacés par des radicaux organiques. [...] ce sont des produits intermédiaires dans l'auto-oxydation de la plupart des substances organiques. Suivant la nature du, ou des radicaux organiques, on distingue différents types de peroxydes. 2, record 1, French, - peroxyde%20organique
Record number: 1, Textual support number: 1 OBS
Comme ils sont très réactifs, ils trouvent une utilisation pratique dans la catalyse de nombreuses réactions en chaîne de type radicalaire, dans la polymérisation vinylique, dans la vulcanisation des polymères paraffiniques. 2, record 1, French, - peroxyde%20organique
Record 1, Key term(s)
- peroxydes organiques
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Elementos y compuestos químicos
Record 1, Main entry term, Spanish
- peróxido orgánico
1, record 1, Spanish, per%C3%B3xido%20org%C3%A1nico
correct, masculine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 CONT
«Peróxido orgánico» significa un compuesto orgánico que contiene la estructura bivalente -O-O- y que puede ser considerado como un derivado estructural del peróxido de hidrógeno donde uno o ambos de los átomos de hidrógeno han sido reemplazados por un radical orgánico. 2, record 1, Spanish, - per%C3%B3xido%20org%C3%A1nico
Record number: 1, Textual support number: 2 CONT
Los [peróxidos] orgánicos como el p. de lauroil son agentes oxidantes muy reactivos, usados industrialmente como agentes blanqueadores y catalizadores de la polimerización. 3, record 1, Spanish, - per%C3%B3xido%20org%C3%A1nico
Record number: 1, Textual support number: 1 OBS
Aunque los peróxidos orgánicos pueden ser donantes de oxígeno en ciertas condiciones, se clasifican separadamente debido al grave peligro de incendio y de autorreactividad que muchos de ellos presentan. 4, record 1, Spanish, - per%C3%B3xido%20org%C3%A1nico
Record 1, Key term(s)
- peróxidos orgánicos
Record 2 - internal organization data 2004-04-30
Record 2, English
Record 2, Subject field(s)
- Analytical Chemistry
Record 2, Main entry term, English
- unstable
1, record 2, English, unstable
correct, adjective
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
Tending toward decomposition or other unwanted chemical change during normal handling or storage. 2, record 2, English, - unstable
Record number: 2, Textual support number: 1 OBS
An unstable chemical in its pure state, or as commonly produced or transported, will vigorously polymerize, decompose, condense, or become self-reactive under conditions of shock, pressure, or temperature. See also Stability. 2, record 2, English, - unstable
Record number: 2, Textual support number: 1 CONT
Some substances are unstable; that is, they react when heated or when they come into contact with another product. As a result, they may cause pressure build-up or increases in temperature, or they may release toxic or corrosive products. 3, record 2, English, - unstable
Record number: 2, Textual support number: 2 OBS
unstable : The opposite of "stable, "i. e. the chemical species concerned has a higher molar Gibbs energy than some assumed standard. The term should not be used in place of "reactive" or "transient, "although more reactive or transient species are frequently also more unstable.(Very unstable chemical species tend to undergo exothermic unimolecular decompositions. Variations in the structure of the related chemical species of this kind generally affect the energy of the transition states for these decompositions less than they affect the stability of the decomposing chemical species. Low stability may therefore parallel a relatively high rate of unimolecular decomposition.) 4, record 2, English, - unstable
Record 2, French
Record 2, Domaine(s)
- Chimie analytique
Record 2, Main entry term, French
- instable
1, record 2, French, instable
correct
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
combinaison instable : qui se décompose facilement en ses éléments. 2, record 2, French, - instable
Record number: 2, Textual support number: 1 OBS
instable : Contraire de «stable»; en d'autres termes, l'énergie de Gibbs molaire de l'espèce chimique concernée est plus élevée que celle d'une référence sous-entendue. Ce terme ne doit pas être utilisé comme synonyme de «réactif» ou de «transitoire», bien que souvent les espèces les plus réactives ou les plus éphémères soient aussi les plus instables. (Les espèces chimiques très instables ont tendance à subir des décompositions unimoléculaires exothermiques. Généralement, les variations de structure d'espèces chimiques de ce type, appartenant à une même famille, affectent moins l'énergie es états de transition de leur décomposition que leur stabilité. Dans ce contexte, une faible stabilité peut signifier que la décomposition unimoléculaire est relativement rapide). 3, record 2, French, - instable
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Química analítica
Record 2, Main entry term, Spanish
- inestable
1, record 2, Spanish, inestable
correct
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Se aplica a los compuestos químicos que se descomponen con facilidad. 2, record 2, Spanish, - inestable
Record 3 - internal organization data 1990-02-01
Record 3, English
Record 3, Subject field(s)
- Analytical Chemistry
- Heat (Physics)
- Thermodynamics
Record 3, Main entry term, English
- thermally unstable
1, record 3, English, thermally%20unstable
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
Organic peroxides are thermally unstable substances, which may undergo exothermic self-accelerating decomposition. 1, record 3, English, - thermally%20unstable
Record 3, French
Record 3, Domaine(s)
- Chimie analytique
- Chaleur (Physique)
- Thermodynamique
Record 3, Main entry term, French
- thermiquement instable
1, record 3, French, thermiquement%20instable
correct
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Les peroxydes organiques sont des matières thermiquement instables, qui peuvent subir une décomposition auto-accélérée exothermique. 1, record 3, French, - thermiquement%20instable
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1989-07-31
Record 4, English
Record 4, Subject field(s)
- Chemistry
Record 4, Main entry term, English
- exothermic decomposition
1, record 4, English, exothermic%20decomposition
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Organic peroxides are thermally unstable substances, which may undergo exothermic self-accelerating decomposition. 1, record 4, English, - exothermic%20decomposition
Record 4, French
Record 4, Domaine(s)
- Chimie
Record 4, Main entry term, French
- décomposition exothermique
1, record 4, French, d%C3%A9composition%20exothermique
correct, feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Les peroxydes organiques sont des matières thermiquement instables, qui peuvent subir une décomposition auto-accélérée exothermique. 1, record 4, French, - d%C3%A9composition%20exothermique
Record 4, Spanish
Record 4, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: