| Identification | More | [Name]
Urea hydrogen peroxide | [CAS]
124-43-6 | [Synonyms]
CARBAMIDE PERHYDRATE
CARBAMIDE PEROXIDE
HYDROGEN PEROXIDE UREA
HYDROGEN PEROXIDE UREA ADDUCT
PERCARBAMIDE
PERHYDRIT
PERHYDRIT(R)
PERHYDROL-UREA
UREA COMPOUND WITH HYDROGEN PEROXIDE
UREA HYDROGEN PEROXIDE
UREA HYDROGEN PEROXIDE ADDITION COMPOUND
UREA HYDROGEN PEROXIDE ADDUCT
UREA PEROXIDE
Urea,compd.withhydrogenperoxide(1:1)
urea,compd.withhydrogenperoxide(h2o2)(1:1)
ureahydrogenperoxide(1gtablets)
ureahydrogenperoxideaddition
ureaperoxide,carbamideperoxide
hydrogen peroxide (H2O2), compounded with urea (1:1)
hydrogen peroxide carbamide | [EINECS(EC#)]
204-701-4 | [Molecular Formula]
C2H10N4O4 | [MDL Number]
MFCD00013119 | [Molecular Weight]
154.13 | [MOL File]
124-43-6.mol |
| Chemical Properties | Back Directory | [Appearance]
White crystals or crystalline powder. Decomposed by moisture at
temperatures around 40C. Soluble in water, alcohol,
and ethylene glycol; solvents such as ether and
acetone extract hydrogen peroxide and may form
explosive solutions. Active oxygen (min) 16% | [Melting point ]
90-93 °C (lit.) | [Boiling point ]
175.5°C (rough estimate) | [vapor pressure ]
23.3 mm Hg ( 30 °C)
| [refractive index ]
1.4616 (estimate) | [RTECS ]
T4860000 | [storage temp. ]
2-8°C
| [solubility ]
H2O: 0.5 g/mL, clear to very faintly hazy
| [form ]
tablets (1 g each)
| [color ]
White | [PH]
6.3 (H2O, 20℃) | [Stability:]
Unstable. Oxidizer. Severe explosion hazard on exposure to shock or heat. Incompatible with strong oxidizing agents, organic materials, reducing agents, finely powdered metals. May form explosive solutions with ether or propanone. | [Water Solubility ]
500 g/L (20 ºC) | [Sensitive ]
Hygroscopic | [Merck ]
14,1782 | [BRN ]
3680414 | [Exposure limits]
NIOSH: TWA 5 mg/m3 | [CAS DataBase Reference]
124-43-6(CAS DataBase Reference) | [EPA Substance Registry System]
124-43-6(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi,C,O | [Risk Statements ]
R8:Contact with combustible material may cause fire.
R34:Causes burns.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S17:Keep away from combustible material . | [RIDADR ]
UN 1511 5.1/PG 3
| [WGK Germany ]
2
| [F ]
21 | [TSCA ]
Yes | [HazardClass ]
5.1 | [PackingGroup ]
III | [HS Code ]
28470000 | [Toxicity]
LD50 orally in Rabbit: > 2000 mg/kg |
| Hazard Information | Back Directory | [General Description]
A solid or paste-like semisolid. Used to make plastics. | [Reactivity Profile]
UREA HYDROGEN PEROXIDE(124-43-6) is an oxidizing agent. Liable to spontaneous combustion when heated or in contact with organic materials. The contents of a screw-capped brown glass bottle spontaneously erupted after four years storage at ambient temperature. [MCA Case History No. 719]. Combustion may release Irritating ammonia gas. | [Air & Water Reactions]
Decomposed by moisture at about 40°C to yield a solution of hydrogen peroxide (nonhazardous reaction). Water soluble. | [Health Hazard]
Inhalation of dust causes irritation of nose from hydrogen peroxide formed when heated. Contact with eyes causes severe damage. Contact with moist skin causes temporary itching or burning sensation. Ingestion causes irritation of mouth and stomach. | [Chemical Properties]
White crystals or crystalline powder. Decomposed by moisture at
temperatures around 40C. Soluble in water, alcohol,
and ethylene glycol; solvents such as ether and
acetone extract hydrogen peroxide and may form
explosive solutions. Active oxygen (min) 16% | [Uses]
For extemporaneous preparation of H2O2. | [Uses]
Urea hydrogen peroxide is an antiseptic, disinfectant and bleaching agent used in pharmaceuticals and cosmetics respectively. It is used in the whitening of teeth and relieves minor inflammation of gums, oral mucosal surfaces and lips. It finds application in the preparation of plastics, blue print development and starch modification. In addition to this, it is used as a source of hydrogen peroxide easily handled in the laboratory. | [Definition]
ChEBI: A mixture obtained by combining equimolar amounts of hydrogen peroxide and urea. | [Brand name]
Murine Ear
Drops (Ross). | [Flammability and Explosibility]
Notclassified | [Clinical Use]
Carbamide peroxide (Gly-Oxide) is a stable complex of ureaand hydrogen peroxide. It has the molecular formulaH2NCONH2 H2O2. The commercial preparation is a solutionof 12.6% carbamide peroxide in anhydrous glycerin.When mixed with water, hydrogen peroxide is liberated.Carbamide peroxide is used as both an antiseptic and disinfectant.The preparation is especially effective in the treatmentof oral ulcerations or in dental care. The oxygen bubblesthat are liberated remove debris. | [Purification Methods]
It is a safe alternative to H2O2 in various oxidation reactions. It is commercially available in tablets (“rapidly soluble”, equivalent to ~30% H2O2) or as a white powder (with 15-17% active oxygen). It is usually used without purification after assaying for active oxygen. This is done by titration with potassium permanganate or by iodometry, i.e. titration of liberated iodine when glacial acetic acid containing Fe3+ and NaI are added. It can be recrystallised from 30% H2O2 in a molar ratio of ~2:3 by heating in a pyrex dish for a few minutes at ~60o, cooling and allowed to crystallise slowly by evaporation in a crystallising dish. It forms elongated white needles, but if the solution is seeded just before crystallisation and shaken gently for as few seconds, then small plates are formed. Perferably collect the crystals by centrifugation at low temperature and dry them at 0o in vacuo. When dry, it is stable at room temperature and it has been reported that the available oxygen content had not decreased noticeably after 12 months. However, it is best to store it dry at low temperature. It is soluble in organic solvents e.g. EtOH, Et2O, CHCl3, CH2Cl2 and Me2CO with slow decomposition, and its solubility in H2O is 40% where it also decomposes slowly. It decomposes slowly at 40-60o/20mm and at 55-70o/760mm in air, but decomposition appears to accelerate above 80o. It is very useful (and in many cases superior to p-chloroperbenzoic acid) in the oxidation of alkenes, (epoxides), aromatic hydrocarbons (to phenols), ketones (Baeyer-Villiger), sulfides (to sulfones) and N-heterocycles (to N-oxides) when using 5 to 10 molar ratios of oxidant in the presence of acetic or trifluoroacetic anhydrides. Care should be used with this reagent as it is potentially explosive. [Lu et al. J Am Chem Soc 63 1508 1941, Cooper et al. Synlett 533 1990, Beilstein 3 H 54, 3 I 25, 3 II 45, 3 III 105, 3 IV 102.] |
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