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8.14151 EMD Millipore

Potassium superoxide

Potassium superoxide for synthesis. CAS 12030-88-5, pH >7 (H₂O, 20 °C)., for synthesis

Synonym: Potassium peroxide

  • CAS Number 12030-88-5

  • Linear Formula KO₂

  • Molecular Weight 71.1 g/mol

  •  EC Number 234-746-5



packaging   50 g in Glass bottle (8141510050)
density   2.14 g/cm3
mp   380 °C
pH   >7 (H₂O, 20 °C)
shipped in   ambient
storage temp.   Store at +15°C to +25°C.
specifications   Assay (manganometric): ≥ 90.0 %
  KOH (acidimetric): ≤ 4.0 %

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Safety Information

HS Code 
2825 90 85
Hazard Statement(s) 
H271: May cause fire or explosion; strong oxidizer.
H314: Causes severe skin burns and eye damage.
Precautionary Statement(s) 
P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P221: Take any precaution to avoid mixing with combustibles.
P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
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 
5.1A Strongly oxidizing hazardous materials
WGK 1 slightly water endangering
Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I.
Hazard Pictogram(s) 
GHS03  GHS03
Hazard Pictogram(s) 
GHS05  GHS05
Hazard Symbols 
Corrosive  Corrosive
Hazard Symbols 
Oxidising  Oxidising
Declaration (railroad and road) ADR, RID 
UN 2466 , 5.1, I
Declaration (transport by air) IATA-DGR 
UN 2466 , 5.1, I
Declaration (transport by sea) IMDG-Code 
UN 2466 , 5.1, I, Segregation Group: 16 (Peroxides)
Categories of danger 
R Phrase 
R 35
Causes severe burns.
S Phrase 
S 17-26-36/37/39-45
Keep away from combustible material.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
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