Oxidizers & Peroxides
REACH
Carbamide peroxide
CAS Number
124-43-6
EC Number
204-701-4
What is Carbamide peroxide?
Carbamide peroxide (CAS 124-43-6), also known as urea peroxide and designated E927b, is a stable solid oxidant that releases active oxygen upon contact with water.
Where is Carbamide peroxide used?
- Personal care and cosmetics: active ingredient in tooth whitening gels, ear drops and hair bleach formulations
- Textile and paper processing: bleaching agent for fibers and pulp, suited to dry or low-moisture conditions
- Water treatment: oxidizing biocide for disinfection and odor control in industrial and municipal systems
- Pharmaceutical manufacturers incorporate it into topical antiseptic preparations and oral care products.
Good to know: Pharmaceutical use requires sourcing to USP or BP specifications for purity.
Commercial specifications
- Typically 35% active oxygen content by weight
Other Names (Synonyms)
Urea peroxide|urea perhydrate|Urea hydroperoxide|Urea dioxide|Urea compound with hydrogen peroxide (1:1)|Hydrogen peroxide urea|Hydrogen peroxide carbamide|Urea hydrogen peroxide|E927b
How is Carbamide peroxide classified and handled safely? Learn More
Danger
GHS03· Oxidizing GHS05· Corrosive GHS07· Irritant
Hazard Statements
H272 May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H315 Causes skin irritation [Warning Skin corrosion/irritation]
H318 Causes serious eye damage [Danger Serious eye damage/eye irritation]
H314 Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H335 May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
H302 Harmful if swallowed [Warning Acute toxicity, oral]