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LC5158 Potassium superoxide
for synthesis


Order number Packaging Quantity Price €
AC32158 Glass bottle 50 g 50.40


Product information
Synonyms Potassium peroxide
Hill Formula KO2
HS Code 2825 90 85
EC number 234-746-5
Molar mass 71.1 g/mol
CAS number 12030-88-5


Chemical and physical data
Solubility (20 °C) (rigorous decomposition)
Melting point 380 °C
Molar mass 71.1 g/mol
Density 2.14 g/cm3
pH value >7 (H2O, 20 °C)


Safety information according to GHS
Hazard Statement(s) H271: May cause fire or explosion; strong oxidiser.
H314: Causes severe skin burns and eye damage.
Precautionary Statement(s) P210: Keep away from heat/sparks/open flames/hot surfaces. – No smoking.
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.
Signal Word Danger
Hazard Pictogram(s)
RTECS TT6053000
Storage class 5.1A Oxidising Agents
WGK WGK 1 slightly water endangering
Disposal 22
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.


Safety information
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).
Categories of danger corrosive
Hazard Symbol Corrosive


Transport information
Declaration (transport by sea) IMDG-Code UN 2466 POTASSIUM SUPEROXIDE, 5.1, I, Segregation Group: 16 (Peroxides)
Declaration (transport by air) IATA-DGR UN 2466 POTASSIUM SUPEROXIDE, 5.1, I


Assay (manganometric) ≥ 90 %
KOH (acidimetric) ≤ 4 %