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8.20163 EMD Millipore

Bis(α,α-dimethylbenzyl) peroxide

Bis(α,α-dimethylbenzyl) peroxide for synthesis. CAS No. 80-43-3, EC Number 201-279-3., for synthesis

Synonym: Dicumyl peroxide

  • CAS Number 80-43-3

  • Linear Formula C₁₈H₂₂O₂

  • Molecular Weight 270.37 g/mol

  •  EC Number 201-279-3



Related Categories Biochemicals and Reagents More...
packaging   5 g in Glass bottle (8201630005)
density   1.02 g/cm3 (20 °C)
mp   37 - 40 °C
bulk density   520 kg/m3
LD 50 oral   LD50 Rat 4100 mg/kg
shipped in   ambient
storage temp.   Store at +15°C to +25°C.
specifications   Assay (HPLC, area%): ≥ 98.0 % (a/a)
  Melting range (lower value): ≥ 38 °C
  Melting range (upper value): ≤ 41 °C
  Identity (IR): passes test

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Safety Information

HS Code 
2909 60 00
Hazard Statement(s) 
H242: Heating may cause a fire.
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H411: Toxic to aquatic life with long lasting effects.
Precautionary Statement(s) 
P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P273: Avoid release to the environment.
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Storage class 
5.2 Organic peroxides and self-reacting hazardous materials
WGK 2 water endangering
Organic peroxides can be detected in aqueous solutions or organic solvents using the Perex-Test® (Cat. No. 116206). Pure peroxides are diluted to min. 10% in a suitable solvent or with water and added in small portions, with temperature control, to iron(II) chloride (Cat. No. 103860) solution. Test for complete reaction with the Perex-Test® (Cat. No. 116206). Container D. Explosive substances (storage class 4.1A) should be packed separately and tightly sealed for disposal. Ensure sufficient phlegmatization by water or the stated phlegmatizing agent!
Hazard Pictogram(s) 
GHS02  GHS02
Hazard Pictogram(s) 
GHS07  GHS07
Hazard Pictogram(s) 
GHS09  GHS09
Hazard Symbols 
Dangerous for the environment  Dangerous for the environment
Hazard Symbols 
Oxidising  Oxidising
Hazard Symbols 
Irritant  Irritant
Declaration (railroad and road) ADR, RID 
UN 3110 , 5.2,
Declaration (transport by air) IATA-DGR 
UN 3110 , 5.2,
Declaration (transport by sea) IMDG-Code 
UN 3110 , 5.2,
Categories of danger 
oxidizing, irritant, dangerous for the environment
R Phrase 
R 7-36/38-51/53
May cause fire.Irritating to eyes and skin.Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase 
S 3/7-14-36/37/39-61
Keep container tightly closed in a cool place.Keep away from reducing agents, heavy-metal compounds, acids and alkalis.Wear suitable protective clothing, gloves and eye/face protection.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
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