TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
CHLORE ELEMENTAIRE [7 records]
Record 1 - internal organization data 2016-03-07
Record 1, English
Record 1, Subject field(s)
- Food Industries
- Water Treatment (Water Supply)
Record 1, Main entry term, English
- free chlorine
1, record 1, English, free%20chlorine
correct, standardized
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The chlorine present in the form of hypochlorous acid, hypochlorite ions or dissolved elemental chlorine. 2, record 1, English, - free%20chlorine
Record number: 1, Textual support number: 1 CONT
Free chlorine is used as a sterilising agent e.g. in drinking water. 3, record 1, English, - free%20chlorine
Record number: 1, Textual support number: 1 OBS
free chlorine: term and definition standardized by ISO. 4, record 1, English, - free%20chlorine
Record 1, French
Record 1, Domaine(s)
- Industrie de l'alimentation
- Traitement des eaux
Record 1, Main entry term, French
- chlore libre
1, record 1, French, chlore%20libre
correct, masculine noun, standardized
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Chlore présent sous la forme d’acide hypochloreux, d’ions hypochlorite ou de chlore élémentaire dissous. 2, record 1, French, - chlore%20libre
Record number: 1, Textual support number: 1 OBS
chlore libre : terme et définition normalisés par l’ISO. 3, record 1, French, - chlore%20libre
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Industria alimentaria
- Tratamiento del agua
Record 1, Main entry term, Spanish
- cloro libre
1, record 1, Spanish, cloro%20libre
correct, masculine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 DEF
Cloro presente en forma de ácido hipocloroso, iones hipoclorito o cloro elemental disuelto. 1, record 1, Spanish, - cloro%20libre
Record 2 - internal organization data 2011-03-30
Record 2, English
Record 2, Subject field(s)
- Chemical Elements and Compounds
- Pollutants
Universal entry(ies) Record 2
Record 2, Main entry term, English
- chlorine
1, record 2, English, chlorine
correct, see observation
Record 2, Abbreviations, English
Record 2, Synonyms, English
- molecular chlorine 2, record 2, English, molecular%20chlorine
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Hydrogen chloride and inorganic chlorides are introduced into the troposphere by volcanic emissions, by seaspray evaporation and by human activity. Removal of these compounds by rain is so rapid that their concentrations decrease rapidly with altitude. Molecular chlorine (Cl2) escaping from industrial processes is also rapidly removed by chemical processes in the atmosphere. 3, record 2, English, - chlorine
Record number: 2, Textual support number: 1 OBS
chlorine: form recommended by the IUPAC (International Union of Pure and Applied Chemistry) for the systematic name corresponding to the CAS number indicated on the present record; term adopted by Environment Canada: used in the list of pollutants measured in the National Air Pollution Surveillance Network (NAPS). Formula: Cl2. Also designates atomic chlorine, the chemical element having the symbol Cl. 4, record 2, English, - chlorine
Record number: 2, Textual support number: 2 OBS
Also known under the following commercial designations: Bertholite; UN 1017. 4, record 2, English, - chlorine
Record number: 2, Textual support number: 1 PHR
Chlorine gas. 4, record 2, English, - chlorine
Record 2, French
Record 2, Domaine(s)
- Éléments et composés chimiques
- Agents de pollution
Entrée(s) universelle(s) Record 2
Record 2, Main entry term, French
- chlore
1, record 2, French, chlore
correct, see observation, masculine noun, officially approved
Record 2, Abbreviations, French
Record 2, Synonyms, French
- chlore moléculaire 2, record 2, French, chlore%20mol%C3%A9culaire
correct, masculine noun
- chlore à l’état moléculaire 3, record 2, French, chlore%20%C3%A0%20l%26rsquo%3B%C3%A9tat%20mol%C3%A9culaire
correct, masculine noun
- chlore sous forme moléculaire 3, record 2, French, chlore%20sous%20forme%20mol%C3%A9culaire
correct, masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 OBS
chlore : forme recommandée par l'UICPA(Union internationale de chimie pure et appliquée) pour le nom systématique correspondant au numéro CAS indiqué sur la présente fiche; terme uniformisé par le Groupe de travail de terminologie du génie; terme retenu par Environnement Canada : utilisé dans la liste des polluants mesurés par le Réseau national de surveillance de la pollution atmosphérique(RNSPA). Formule : Cl2. Ce terme sert aussi à désigner le chlore atomique, soit le chlore dans sa structure élémentaire, capable de se combiner(symbole Cl). 4, record 2, French, - chlore
Record number: 2, Textual support number: 1 PHR
Chlore gazeux. 4, record 2, French, - chlore
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Elementos y compuestos químicos
- Agentes contaminantes
Entrada(s) universal(es) Record 2
Record 2, Main entry term, Spanish
- cloro
1, record 2, Spanish, cloro
correct, masculine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
- cloro molecular 1, record 2, Spanish, cloro%20molecular
correct, masculine noun
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Elemento gaseoso, n.° atómico 17, amarillo verdoso, muy pesado, poderoso, oxidante, sofocante y tóxico. 1, record 2, Spanish, - cloro
Record number: 2, Textual support number: 1 OBS
Se encuentra en dos formas: como gas amarillo-verdoso, pesado, incombustible, de olor picante e irritante, o como líquido claro, de color ámbar y olor irritante. Soluble en cloruros y alcoholes. Algo soluble en agua fría. Tóxico e irritante por inhalación. Riesgo de incendio moderado en contacto con materiales reductores. 1, record 2, Spanish, - cloro
Record number: 2, Textual support number: 2 OBS
Fórmula química: Cl2 1, record 2, Spanish, - cloro
Record 3 - external organization data 2005-01-07
Record 3, English
Record 3, Subject field(s)
- Chemistry
- Water Treatment (Water Supply)
- Food Industries
- Compartment - Canadian Nuclear Safety Commission
Universal entry(ies) Record 3
Record 3, Main entry term, English
- chlorine
1, record 3, English, chlorine
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- atomic chlorine 2, record 3, English, atomic%20chlorine
correct
- elemental chlorine 3, record 3, English, elemental%20chlorine
correct
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
Chlorine [is] an element that is found in biological tissues as the chloride ion. The body contains about 100g of chloride and the average diet contains 6-7 g, mainly as sodium chloride. Free chlorine is used as a sterilising agent e.g. in drinking water. 4, record 3, English, - chlorine
Record number: 3, Textual support number: 1 OBS
Used also as a flour bleaching agent and as an aging and an oxidizing agent. 5, record 3, English, - chlorine
Record number: 3, Textual support number: 2 CONT
The catalytic agent is atomic chlorine, [symbol] Cl, which is released when stable chlorine compounds are disassociated by short wavelength UV, in the middle and upper stratosphere above 25 km. 6, record 3, English, - chlorine
Record number: 3, Textual support number: 2 OBS
elemental: consisting of an element only, as distinguished from a compound of an element, e.g. elemental iron is Fe (not Fe203 or other iron compound). 7, record 3, English, - chlorine
Record number: 3, Textual support number: 3 OBS
chlorine: Also frequently used to designate molecular chlorine, formula Cl2 (q.v.). 8, record 3, English, - chlorine
Record number: 3, Textual support number: 1 PHR
Sodium chlorine. 8, record 3, English, - chlorine
Record 3, French
Record 3, Domaine(s)
- Chimie
- Traitement des eaux
- Industrie de l'alimentation
- Tiroir - Commission canadienne de sûreté nucléaire
Entrée(s) universelle(s) Record 3
Record 3, Main entry term, French
- chlore
1, record 3, French, chlore
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- chlore atomique 2, record 3, French, chlore%20atomique
correct, masculine noun
- chlore élémentaire 3, record 3, French, chlore%20%C3%A9l%C3%A9mentaire
correct, masculine noun
- chlore à l’état atomique 4, record 3, French, chlore%20%C3%A0%20l%26rsquo%3B%C3%A9tat%20atomique
correct, masculine noun
- chlore sous forme atomique 5, record 3, French, chlore%20sous%20forme%20atomique
correct, masculine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Corps simple, gaz de la famille des halogènes. (Élément chimique de symbole Cl). 6, record 3, French, - chlore
Record number: 3, Textual support number: 1 CONT
Le chlore, dont le nom vient du terme grec chloros, qui signifie vert-jaune, entre, à un titre ou à un autre, dans la moitié des fabrications de la chimie moderne [...]. Agent anti-microbien, présent dans les emballages, le chlore a de très nombreuses applications. Cependant, comme tout outil à la disposition des hommes, il présente des effets indésirables que l’on doit s’efforcer de limiter. 7, record 3, French, - chlore
Record number: 3, Textual support number: 1 OBS
chlore : Si on fait exception du chlore atmosphérique, où il est à l’état atomique, le chlore se retrouve généralement à l’état moléculaire, soit C12, d’où l’emploi de ce terme pour désigner aussi, de manière elliptique, le chlore à l’état moléculaire. 8, record 3, French, - chlore
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Química
- Tratamiento del agua
- Industria alimentaria
- Compartimiento - Comisión Canadiense de Seguridad Nuclear
Entrada(s) universal(es) Record 3
Record 3, Main entry term, Spanish
- cloro
1, record 3, Spanish, cloro
correct, masculine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
- cloro atómico 2, record 3, Spanish, cloro%20at%C3%B3mico
correct, masculine noun
- cloro elemental 2, record 3, Spanish, cloro%20elemental
correct, masculine noun
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Elemento gaseoso, n.° atómico 17, amarillo verdoso, muy pesado, poderoso, oxidante, sofocante y tóxico. 3, record 3, Spanish, - cloro
Record number: 3, Textual support number: 1 OBS
Se encuentra en dos formas: como gas amarillo-verdoso, pesado, incombustible, de olor picante e irritante, o como líquido claro, de color ámbar y olor irritante. Soluble en cloruros y alcoholes. Algo soluble en agua fría. Tóxico e irritante por inhalación. Riesgo de incendio moderado en contacto con materiales reductores. 4, record 3, Spanish, - cloro
Record 4 - internal organization data 2001-04-12
Record 4, English
Record 4, Subject field(s)
- Pulp Preparation (papermaking)
Record 4, Main entry term, English
- elemental chlorine-free
1, record 4, English, elemental%20chlorine%2Dfree
correct
Record 4, Abbreviations, English
- ECF 2, record 4, English, ECF
correct
Record 4, Synonyms, English
- elemental chlorine free 3, record 4, English, elemental%20chlorine%20free
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
Bleaching without using chlorine or chlorine compounds. 1, record 4, English, - elemental%20chlorine%2Dfree
Record number: 4, Textual support number: 1 CONT
ECF paper is made with ECF pulp and ECF recycled paper. 1, record 4, English, - elemental%20chlorine%2Dfree
Record 4, French
Record 4, Domaine(s)
- Préparation de la pâte à papier
Record 4, Main entry term, French
- sans chlore élémentaire
1, record 4, French, sans%20chlore%20%C3%A9l%C3%A9mentaire
correct
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Terme qualifiant une pâte blanchie sans l’utilisation de chlore gazeux. 2, record 4, French, - sans%20chlore%20%C3%A9l%C3%A9mentaire
Record number: 4, Textual support number: 1 CONT
Papier blanchi sans chlore, vendu souvent comme papier bio ou éco. Cette appellation peut signifier beaucoup de choses : La cellulose peut être blanchie avec des composés chlorés au lieu de chlore [...] ou avec de l'oxygène. Les abréviations ECF et TCF indiquent plus exactement le processus de production du papier. ECF=«elementary chlorine free»=sans chlore élémentaire=blanchi avec des composés chlorés. TCF=«totally chlorine free»=totalement sans chlore=blanchi à l'oxygène. 3, record 4, French, - sans%20chlore%20%C3%A9l%C3%A9mentaire
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2000-12-08
Record 5, English
Record 5, Subject field(s)
- Pulp Preparation (papermaking)
Record 5, Main entry term, English
- elemental chlorine-free pulp
1, record 5, English, elemental%20chlorine%2Dfree%20pulp
correct
Record 5, Abbreviations, English
- ECF pulp 1, record 5, English, ECF%20pulp
correct
Record 5, Synonyms, English
- elementary chlorine free pulp 2, record 5, English, elementary%20chlorine%20free%20pulp
correct
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
Wood pulp that is free from elemental chlorine. 1, record 5, English, - elemental%20chlorine%2Dfree%20pulp
Record 5, Key term(s)
- elementary chlorine-free pulp
Record 5, French
Record 5, Domaine(s)
- Préparation de la pâte à papier
Record 5, Main entry term, French
- pâte sans chlore élémentaire
1, record 5, French, p%C3%A2te%20sans%20chlore%20%C3%A9l%C3%A9mentaire
correct, feminine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Pâte à papier dont la composition, exempte de chlore élémentaire, la rend plus écologique. 2, record 5, French, - p%C3%A2te%20sans%20chlore%20%C3%A9l%C3%A9mentaire
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2000-12-07
Record 6, English
Record 6, Subject field(s)
- Pulp Preparation (papermaking)
Record 6, Main entry term, English
- totally chlorine-free
1, record 6, English, totally%20chlorine%2Dfree
correct, adjective phrase
Record 6, Abbreviations, English
- TCF 1, record 6, English, TCF
correct
Record 6, Synonyms, English
- totally chlorine free 2, record 6, English, totally%20chlorine%20free
correct, adjective phrase
- TCF 2, record 6, English, TCF
correct
- TCF 2, record 6, English, TCF
Record 6, Textual support, English
Record number: 6, Textual support number: 1 DEF
[Is said of] a pulp bleached without any chlorine compound ... 2, record 6, English, - totally%20chlorine%2Dfree
Record number: 6, Textual support number: 1 CONT
TCF paper is made with TCF pulp and recycled TCF paper. 1, record 6, English, - totally%20chlorine%2Dfree
Record 6, French
Record 6, Domaine(s)
- Préparation de la pâte à papier
Record 6, Main entry term, French
- totalement sans chlore
1, record 6, French, totalement%20sans%20chlore
correct, adjective phrase
Record 6, Abbreviations, French
Record 6, Synonyms, French
- sans chlore 2, record 6, French, sans%20chlore
correct, adjective phrase
- SC 2, record 6, French, SC
correct
- SC 2, record 6, French, SC
Record 6, Textual support, French
Record number: 6, Textual support number: 1 DEF
[Qualifie] une pâte qui a été blanchie sans qu’aucun produit à base de chlore n’ait été employé. 2, record 6, French, - totalement%20sans%20chlore
Record number: 6, Textual support number: 1 CONT
Papier blanchi sans chlore, vendu souvent comme papier bio ou éco. Cette appellation peut signifier beaucoup de choses : La cellulose peut être blanchie avec des composés chlorés au lieu de chlore [...] ou avec de l'oxygène. Les abréviations ECF et TCF indiquent plus exactement le processus de production du papier. ECF=«elementary chlorine free»=sans chlore élémentaire=blanchi avec des composés chlorés. TCF=«totally chlorine free»=totalement sans chlore=blanchi à l'oxygène. 1, record 6, French, - totalement%20sans%20chlore
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 1998-11-16
Record 7, English
Record 7, Subject field(s)
- Scientific Measurements and Analyses
- Pulp Preparation (papermaking)
Record 7, Main entry term, English
- kappa factor
1, record 7, English, kappa%20factor
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
- active chlorine multiple 2, record 7, English, active%20chlorine%20multiple
Record 7, Textual support, English
Record number: 7, Textual support number: 1 DEF
A ratio of the amount of (equivalent) chlorine applied in the initial chlorination stage to the amount of lignin in the pulp entering the initial chlorination stage. 2, record 7, English, - kappa%20factor
Record number: 7, Textual support number: 1 CONT
The Kappa Factor is also known as the Active Chlorine Multiple (ACM). It is the sum of all chlorine compound additions to the first chlorination stage (converted to active chlorine equivalent, i.e. ClO2 wt% charge x 2.63) divided by the Kappa number of the pump entering the first chlorination stage. The amount of AOX formation is directly related to the Kappa factor; for any given pulp the relationship is linear in a Cl2-free sequence. An important relationship exists between the Kappa factor (and ClO2 substitution) and the tendency to form 2,3,7,8-TCDD. There is a need to operate in the vicinity of a Kappa factor of 0.17, even at high ClO2 substitution, to ensure that polychlorinated dioxins and furans are not formed. 2, record 7, English, - kappa%20factor
Record 7, French
Record 7, Domaine(s)
- Mesures et analyse (Sciences)
- Préparation de la pâte à papier
Record 7, Main entry term, French
- facteur Kappa
1, record 7, French, facteur%20Kappa
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
- multiple de chlore actif 1, record 7, French, multiple%20de%20chlore%20actif
masculine noun
Record 7, Textual support, French
Record number: 7, Textual support number: 1 DEF
Rapport de la quantité de chlore (ou l’équivalent) appliquée au premier stade de chloration sur la quantité de lignine présente dans la pâte. C’est la somme de tous les composés chlorés ajoutés lors de la chloration (convertit en équivalent chlore actif), c’est-à-dire concentration du ClO2 (% massique)X 2.63) divisée par l’Indice Kappa de la pâte initiale. 1, record 7, French, - facteur%20Kappa
Record number: 7, Textual support number: 1 CONT
Une relation directe existe entre la quantité de COA et le Facteur Kappa. Dans une séquence sans chlore élémentaire, la relation est linéaire pour toutes les pâtes. Une autre relation existe entre le Facteur Kappa(et le degré de substitution en ClO2) et la tendance à former le 2, 3, 7, 8-TCDD. Il est donc nécessaire d’opérer dans le voisinage d’un Facteur Kappa de 0. 17 afin de s’assurer que des dioxines et furanes polychlorés ne puissent se former. 1, record 7, French, - facteur%20Kappa
Record 7, Spanish
Record 7, 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: