Explain the structure of hydrogen peroxide. What precaution is taken while its storage and why?

The hydrogen peroxide H2O2 contains a peroxide group where oxygen carries -1 charge and single bond is found between O-O atom and so the structure becomes, H-O-O-H. 
It is a non planar molecule for which two oxygen atoms are linked together by a single covalent bond and each of them are further attached with one H-atom by a single covalent bond.
The two O-H bonds are in different planes due to repulsion between the different bonding and antibonding orbitals.
The dihedral angle between the two planes is 111.50 in gas phase but reduces to 90.2in crystalline from due to hydrogen bondings.
The structure is givena s:


​H2O2 is kept very carefully in wax lined glass or plastic vessel and kept in dark room too. It is because, the hydrogen peroxide is highly reactive and in the wax lined glass or in plastic containers at dark room, no light enters to it and no self decomposition takes place because when light is provided to the peroxide it decomposes itself to water and oxygen gas.

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