TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

ANHYDROUS ACID [9 records]

Record 1 2011-12-12

English

Subject field(s)
  • Food Additives
  • Breadmaking
DEF

A [chemical] leavening agent that raises dough by the gas(carbon dioxide) produced when baking soda and acid react in the presence of water : it usually contains baking soda mixed with either starch or flour and cream of tartar or other acid-forming substance, as anhydrous sodium aluminum sulfate.

Key term(s)
  • baking-powder

French

Domaine(s)
  • Additifs alimentaires
  • Boulangerie
DEF

[...] mélange de substances chimiques (bicarbonate de soude ou carbonate d'ammoniaque associé avec de la crème de tartre, de l'acide tartrique ou du phosphate d'aluminium sodique, et avec un excipient : farine, amidon ou carbonate de chaux alimentaire).

Spanish

Campo(s) temático(s)
  • Aditivos alimentarios
  • Panificación
DEF

Producto químico que permite dar esponjosidad a una masa debido a la capacidad de liberar dióxido de carbono [...], es una mezcla de un ácido no tóxico (como el cítrico o el tartárico) y una sal de un ácido o base débil, generalmente carbonato o bicarbonato [...]

Save record 1

Record 2 2011-08-23

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
PbO2
formula, see observation
O2Pb
formula, see observation
1309-60-0
CAS number
DEF

A chemical compound ... which appears under the form of poisonous, brown hexagonal crystals that decompose when heated, is insoluble in water and alcohol, soluble in glacial acetic acid, is derived by adding bleaching powder to an alkaline solution of lead hydroxide, and is used as an oxidizing agent, in electrodes, lead-acid storage batteries, matches and explosives, as a textile mordant, in dye manufacture, and as an analytical reagent.

OBS

Chemical formula: PbO2 or O2Pb

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
PbO2
formula, see observation
O2Pb
formula, see observation
1309-60-0
CAS number
OBS

Formule chimique : PbO2 ou O2Pb

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
PbO2
formula, see observation
O2Pb
formula, see observation
1309-60-0
CAS number
OBS

Sólido cristalino de color pardo. Soluble en ácido acético glacial, insoluble en agua y alcohol. Oxidante. Tóxico.

OBS

Fórmula química: PbO2 o O2Pb

Save record 2

Record 3 2011-06-22

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
(CH3)2NH
formula, see observation
C2H7N
formula, see observation
124-40-3
CAS number
DEF

A chemical product which appears under the form of an anhydrous gas with an ammoniacal odor, is derived by the interaction of methanol and ammonia over a catalyst at high temperatures, and is used as an acid gas absorbent, a dehairing agent, a flotation agent, an antioxidant, a solvent, in the manufacture of dimethylformamide and dimethylacetamide, in dyes, gasoline stabilizers, pharmaceuticals, textile chemicals, rubber accelerators, electroplating, missile fuels, pesticide and rocket propellants, surfactants, and as a reagent for magnesium.

OBS

dimethylamine: used by the American Conference of Governmental Industrial Hygienists (ACGIH) and by the US Occupational Safety and Health Administration (OSHA).

OBS

N-methylmethanamine: The capital letter "N" must be italicized.

OBS

DMA: This might be an in-house or a non-recognized abbreviation; not to be used alone, to avoid any risk of confusion.

OBS

Chemical formula: (CH3)2NH or C2H7N

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
(CH3)2NH
formula, see observation
C2H7N
formula, see observation
124-40-3
CAS number
DEF

Composé se présentant sous la forme d'un gaz incolore, d'odeur ammoniacale, très soluble dans l'eau, l'alcool, l'éther et les hydrocarbures, que l'on utilise dans les accélérateurs de vulcanisation, les colorants, les émulsifiants, les produits pharmaceutiques et les solvants.

OBS

N-méthylméthanamine: La lettre majuscule «N» s'écrit en italique.

OBS

Formule chimique : (CH3)2NH ou C2H7

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
(CH3)2NH
formula, see observation
C2H7N
formula, see observation
124-40-3
CAS number
DEF

Gas con olor amoniacal, soluble en alcohol, éter y agua. Inflamable. Tóxico e irritante.

OBS

Fórmula química: (CH3)2NH o C2H7

Save record 3

Record 4 2011-02-08

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
(NH4)2Ni(SO4)2
formula, see observation
25749-08-0
CAS number
OBS

See also ammonium nickel sulfate hexahydrate (CAS number: 7785-20-8) and ammonium nickel sulfate (CAS number: 15699-18-0).

OBS

Chemical formula: (NH4)2Ni(SO4)2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
(NH4)2Ni(SO4)2
formula, see observation
25749-08-0
CAS number
OBS

Voir aussi sulfate d'ammonium et de nickel hexahydrate (numéro CAS : 7785-20-8) et sulfate d'ammonium et de nickel (numéro CAS : 15699-18-0).

OBS

Formule chimique : (NH4)2Ni(SO4)2

Spanish

Save record 4

Record 5 2011-01-31

English

Subject field(s)
  • Chemical Elements and Compounds
  • Air Pollution
Universal entry(ies)
HNO4
formula, see observation
NHO4
formula, see observation
HO2NO2
formula, see observation
DEF

An explosive acid HNO4 held to be obtained as a liquid or in the form of salts(as by oxidation of nitrogen pentoxide with anhydrous hydrogen peroxide)-called also peroxynitric acid; not used systematically

OBS

Chemical formula: HNO4 or NHO4 or HO2NO2

French

Domaine(s)
  • Éléments et composés chimiques
  • Pollution de l'air
Entrée(s) universelle(s)
HNO4
formula, see observation
NHO4
formula, see observation
HO2NO2
formula, see observation
DEF

Substance qui agit comme réservoir d'azote dans la stratosphère.

OBS

Formule chimique : HNO4 ou NHO4 ou HO2NO2

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Contaminación del aire
Entrada(s) universal(es)
HNO4
formula, see observation
NHO4
formula, see observation
HO2NO2
formula, see observation
OBS

Fórmula química: HNO4 o NHO4 o HO2NO2

Save record 5

Record 6 2011-01-12

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
DEF

A colorless pungent nonflammable poisonous gas HCl that fumes strongly in moist air and that is obtained primarily as a by-product of the chlorination of organic compounds or by burning hydrogen in chlorine.

OBS

Use: Production of vinyl chloride form acetylene, and alkyl chlorides from olefins; hydrochlorination; polymerization; isomerization, alkylation; and nitration reactions.

OBS

It yields hydrochloric acid when dissolved in water. See also that other record.

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
DEF

[...] gaz incolore, d'odeur piquante et de saveur acide [...], assez facile à liquéfier, [qui] bout sous la pression atmosphérique à [...] - 85 °C, [...] très soluble dans l'eau [...]

OBS

La solution de chlorure d'hydrogène HCl dans l'eau constitue l'acide chlorhydrique [voir aussi cette fiche].

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
DEF

Gas fumante, con olor sofocante, incoloro, soluble en agua, alcohol y éter. No inflamable. Tóxico e irritante.

Save record 6

Record 7 2010-12-23

English

Subject field(s)
  • Chemistry
Universal entry(ies)
P2O5
formula, see observation
1314-56-3
CAS number
DEF

A compound known in various polymeric forms ... that is obtained usually by burning phosphorus in an excess of dry air and occurs as a white powder that reacts vigorously and sometimes explosively with water to form phosphoric acids ... and is used chiefly as a drying agent, as a condensing agent in organic synthesis, and in making phosphoric acids and derivatives ...

OBS

Chemical formula: P205

French

Domaine(s)
  • Chimie
Entrée(s) universelle(s)
P2O5
formula, see observation
1314-56-3
CAS number
CONT

Les principales [combinaisons de phosphore avec l'oxygène] sont l'anhydride phosphoreux et l'hémipentaoxyde de phosphore ou anhydride phosphorique. On les obtient par combustion du phosphore en présence d'air; pour l'anhydride phosphorique, on utilise un excès d'air. [Il] est solide, blanc, très avide d'eau, ce qui le fait employer comme desséchant énergique.

OBS

Formule chimique : P205

Spanish

Campo(s) temático(s)
  • Química
Entrada(s) universal(es)
P2O5
formula, see observation
1314-56-3
CAS number
DEF

Polvo blanco. Absorbe la humedad atmosférica, formando ácido metapiro-u orto-fosfórico. Fuerte irritante. Inflamable.

OBS

Fórmula química: P205

Save record 7

Record 8 2000-10-24

English

Subject field(s)
  • Chemical Elements and Compounds

French

Domaine(s)
  • Éléments et composés chimiques

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Save record 8

Record 9 1992-06-30

English

Subject field(s)
  • Pulp and Paper
CONT

Hydrolysis with Hydrogen Chloride Gas.... A variation of the use of concentrated hydrochloric acid combined with hydrogen chloride is the process of Hereng. Here, wood chips are impregnated with 30% hydrochloric acid in a mixer and then transferred by a conveyor into the reactor. Because the chips are not predried, the acid concentration in them is reduced to 20%. The reactor consists of a hexagonal upright vessel equipped with numerous inclined trays. The impregnated wood is moved from the top toward the bottom by means of a vibrator and thus the prehydrolysis is completed after 45 minutes. The acid, containing chiefly pentoses, is filtered off and part of it is returned to the mixer. In this way, the sugar concentration in the prehydrolyzate is increased to about 20% to 25%. In a second step, the material, which has again been mixed with 30% hydrochloric acid, is passed through the reactor and hydrogen chloride gas is injected at the bottom in a countercurrent. In this way, the acid concentration is increased to 40% to 41% or more. The hydrolyzed material is conveyed from the bottom of the reactor to a drying chamber and is dried there with anhydrous hydrogen chloride gas which has previously been passed through a calcium chloride solution. The hydrolyzed material, consisting of lignin and sugar, is extracted with water and the sugar solution is subjected to a posthydrolysis.

French

Domaine(s)
  • Pâtes et papier
CONT

Plusieurs pays continuent à faire des recherches pour améliorer l'hydrolyse chimique. Le procédé Hereng utilisant l'acide chlorhydrique gazeux permet d'atteindre un meilleur rendement en sucre et de récupérer l'acide.

Spanish

Save record 9

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