Hydrogen peroxide / H₂O₂

Hydrogen peroxide

Gas Identification

Other denomination

Oxygenated water, Perhydrol

CAS Registry Number
SCBA type

Chemical properties

Molecular formula
Molecular mass
34 g/mol

Physical properties

Boiling point
150,2 °C
Autoignition temperature
Gas/Vapour density
10,54 eV

Flammability limit


Threshold limit value

1 ppm • 1,5 mg/m³

Hydrogen peroxide : Description and use


Hydrogen peroxide simultaneously has oxidising properties in relation to iodide ions and reducing properties in relation to permanganate ions. Its aqueous solution is called oxygenated water. It is colourless and slightly more viscous than water. It is an effective bleaching agent. It is used as an antiseptic. It is a pale blue liquid (in its pure state).


This product is flammable under the following conditions:

  • It can catch fire if it is contact with organic substances.
  • It can catch fire if it is contact with substances which are readily oxidisable.


It can explode if it is in contact with organic substances. Concentrated vapours at over 40% may explode upon decomposition.


Its properties are useful in the preparation of a wide range of aqueous solutions which are used:

  • As a bleaching agent for wood pulp, paper pulp, recycled paper and textile fibres.
  • As an intermediate for synthesis and an oxidisation agent: hydrogen peroxide is used to manufacture numerous mineral, organic and chemical products, and in particular, organic peroxides, mineral peroxides (mainly perborate and sodium percarbonate), peracetic acid, plasticisers (obtained by epoxidation of unsaturated compounds, for example using soybean oil), amine oxides, etc.
  • As a disinfectant or bleaching agent in the pharmaceutical industry (disinfectant for contact lenses, etc.), the food industry (disinfection of packaging and equipment), etc.
  • As a component in hair care products (hair dye, perm setting agent).
  • As an industrial and domestic waste water treatment, and a treatment agent for some gaseous effluents (hydrogen sulphide formation control).
  • As a propellant for aeroplanes and rockets.
  • In the metal industry, in metallurgy, in the electronics industry.
  • In laboratories.

Hydrogen peroxide : Warnings and caution

GHS hazard statements

H271 - May cause fire or explosion; strong oxidiser.
H302 - Harmful if swallowed.
H314 - Causes severe skin burns and eye damage.
H332 - Harmful if inhaled.
H335 - May cause respiratory irritation.

GHS precautionary statements

P102 - Keep out of reach of children.
P261 - Avoid breathing dust/fumes/gas/mist/vapours/spray.
P280 - Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310 - Immediately call a POISON CENTRE or doctor/physician.
P221 - Take any precaution to avoid mixing with combustibles.
P235+P410 - Keep cool. Protect from sunlight.

SGH05 : Corrosif
SGH03 : Comburant