peroxyde d'hydrogène
- Domaine
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- chimie chimie minérale
- Date
Définition :
Liquide incolore en faible masse, bleu sous une certaine épaisseur, de densité 1,46 et se solidifiant à ‑0,89 °C.
Note :
En solution dans l'eau, c'est un acide faible. En dehors des applications militaires du peroxyde d'hydrogène (comburant pour moteurs de fusées), l'industrie n'en utilise guère comme agent décolorant des fibres végétales ou animales, ou comme désinfectant qu'un faible tonnage.
Termes :
- peroxyde d'hydrogène n. m.
- eau oxygénée n. f.
Traductions
-
anglais
Date :Définition
A viscous liquid with strong oxidizing properties.
Notes :
Powerful bleaching agent; and, as its decomposition products are water and oxygen, it is much used as a disinfectant.
It has been used for military propulsion purposes (rockets, etc.), but its chief commercial applications are as a bleach in the textile and paper industries, in a number of important reactions in the manufacture of synthetic chemicals; as a blowing agent; and as an initiator of polymerization, the latter effect being due to formation of free radicals during decomposition.
The best known and most widely used of the peroxide compounds, which are characterized by the presence of two linked oxygen atoms; the formula is H2O2, the structure being represented by H-O-O-H. It is liquid at room temperature, with a freezing point the same as water. it is usually handle commercially in aqueous solutions from as low 3% (for antiseptic use) to 90%. Unless inhibited with acetanilide, it decomposes in the presence of impurities, evolving atomic oxygen. For this reason it is an active oxidizing agent:; organic materials will ignite on contact with concentrated H2O2, and solutions of such materials in the concentrated peroxide may explode.Terme :
- hydrogen peroxide