CAS 7722-84-1: Hydrogen Peroxide (H2O2)

Identity

CAS Number	7722-84-1
Molecular Formula	H2O2
IUPAC Name	hydrogen peroxide
Molecular Weight	34.01 g/mol
SMILES	`OO`
Synonyms	peroxide, dihydrogen dioxide, oxydol, H2O2

2D Structure

Physical Properties

Density	1.11 g/mL at 25°C
Boiling Point	150.2°C
Melting Point	-0.43°C
Flash Point	None°C
Vapor Pressure	0.3 kPa at 20°C
Refractive Index	nD = 1.406
Dielectric Constant	ε = 84.2

Safety & GHS Classification

GHS03GHS05Irritant

H271: May cause fire or explosion; strong oxidizer
H302: Harmful if swallowed
H314: Causes severe skin burns and eye damage
H332: Harmful if inhaled

Storage: Store in vented containers away from heat and combustible materials. Strong oxidizer — never mix with organic materials or reducing agents. Concentrated solutions (>30%) are particularly hazardous. Decomposes to water and oxygen — pressure can build in sealed containers.