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Hydrogen peroxide

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Hydrogen peroxide
Hydrogen peroxide
General
Systematic name Dihydrogen dioxide
Other names Hydrogen peroxide

hydrogen dioxide
dioxidane

Molecular formula H2O2
Molar mass 34.0147 g/mol34.015 amu
Appearance Very pale blue color;

colorless in solution.

CAS number [7722-84-1]
Properties
Density and phase 1.4 g/cm31.4 g/ml, liquid
Solubility in water Miscible
Melting point -11 °C262.15 K
12.2 °F
471.87 °R
Boiling point 150.2 °C423.35 K
302.36 °F
762.03 °R
Acidity 11.65
Viscosity 1.245 cP at 20 °C
Structure
Dipole moment 2.26 D D
Hazards
MSDS External MSDS Data
Main hazards Oxidant, corrosive.
NFPA 704

0
3
1
OX


Flash point Nonflammable
R/S statement R: R: R5, R8, R20, R22,R35
S: S: (S1), (S2), S17, S26,S28,

S36, S37, S39, S45

RTECS number MX0900000
Related compounds
Other cations Sodium Peroxide
Related compounds

Water
Ozone
Hydrazine

Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Disclaimer and references

Hydrogen peroxide is a pale blue liquid with an acidity barely more than water. The liquid has a very strong oxidizing element, and is still used by many doctors and dentists as a sanitizing agent. Hydrogen peroxide is also used as a strong propellant in rockets in high concentration (usually 70% or above). [1]

Studies show that solutions over 8% are corrosive to the skin. [2] In smaller solutions, it is a powerful agent for oxidizing, sanitizing, and bleaching, as well as its component as a propellant for rocketry. [3]

Contents

Properties

Chemical Properties

Hydrogen peroxide has one more hydrogen in its chemical formula than water does. It is one of the most powerful oxidizers known to man, stronger than chlorine, chlorine oxide, and potassium permanganate. In reactions, it is usually used as reducing agent since it is known to spontaneously degenerate into water and oxygen. Hydrogen peroxide can also form inorganic or organic compounds. [4]

Physical Properties

In a diluted form, hydrogen peroxide is a colorless liquid. Otherwise it is a very pale blue in color, and is nonflammable. It is not acidic, and in a diluted solution is generally safe. Hydrogen peroxide is corrosive, and should be handled cautiously.

Because of its chemical properties, any container of hydrogen peroxide must be kept tightly sealed, or it will lose its potency when the hydrogen peroxide decomposes into oxygen and water. It must also be periodically tested and replaced if the potency has diminished. [5]

Occurrences

Hydrogen Peroxide is not a compound that forms in nature. It was formed by reacting barium peroxide with nitric acid for its discovery.[6]

Uses

Hydrogen peroxide can be used for many things. Around the home, it can be used as a bleach for hair. The term 'bottle blond' came from this use.

Many people get themselves pierced. Hydrogen peroxide is given or advised to them as a cleaning agent for the wounds. On contact with the earring or piercing, it fizzes and cleans the hole to prevent infections. Hydrogen peroxide is used to clean wounds of any kind.

Hydrogen peroxide is used to whiten skeletons that are put on display, and if mishandled can temporarily whiten skin.

Some gardeners also believe that the spontaneous degeneration of hydrogen peroxide plays a huge role in releasing oxygen for their plants' roots, and that it also controls root rot.

In other areas of use, hydrogen peroxide is used as a propellant for rockets.[7]

References


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