8.02410 EMD Millipore


p-Benzoquinone for synthesis. CAS 106-51-4, pH 4 (1 g/l, H₂O, 20 °C)., for synthesis

Synonym: p-Quinone, 1,4-Benzoquinone, 1,4-Cyclohexadiene-3,6-dione

  • CAS Number 106-51-4

  • Linear Formula C₆H₄O₂

  • Molecular Weight 108.09 g/mol

  •  EC Number 203-405-2



Related Categories Biochemicals and Reagents More...
packaging   100 g in Glass bottle (8024100100)
  25 kg in Plastic drum (8024109025)
vapor pressure   0.12 hPa (20 °C)
solubility   10 g/l
density   1.32 g/cm3 (20 °C)
autoignition temp.   560 °C
mp   110 - 113 °C
pH   4 (1 g/l, H₂O, 20 °C)
bulk density   700 kg/m3
LD 50 oral   LD50 Rat 130 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.

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Safety Information

HS Code 
2914 69 80
Hazard Statement(s) 
H301 + H331: Toxic if swallowed or if inhaled
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
H410: Very toxic to aquatic life with long lasting effects.
Precautionary Statement(s) 
P273: Avoid release to the environment.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
6.1C Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK 3 highly water endangering
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Pictogram(s) 
GHS09  GHS09
Hazard Symbols 
Dangerous for the environment  Dangerous for the environment
Hazard Symbols 
Toxic  Toxic
Declaration (railroad and road) ADR, RID 
UN 2587 , 6.1, II
Declaration (transport by air) IATA-DGR 
UN 2587 , 6.1, II
Declaration (transport by sea) IMDG-Code 
UN 2587 , 6.1, II
Categories of danger 
toxic, irritant, dangerous for the environment
R Phrase 
R 23/25-36/37/38-50
Toxic by inhalation and if swallowed.Irritating to eyes, respiratory system and skin.Very toxic to aquatic organisms.
S Phrase 
S 26-28-45-61
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.After contact with skin, wash immediately with plenty of soap and water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).Avoid release to the environment. Refer to special instructions/ Safety data sheets.
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