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LC4627 Osmium(VIII) oxide

for microscopy


Order number Packaging Quantity Price €
AC31627 Glass ampoule 1 g 123.3
AC31627 Glass ampoule 100 mg 31.28
AC31627 Glass ampoule 500 mg 68.4


Product information
Synonyms Osmic acid, Osmiumtetraoxide
Hill Formula O4Os
Chemical formula OsO4
HS Code 2843 90 90
EC number 244-058-7
Molar mass 254.19 g/mol
Storage Store at +15°C to +25°C.
EC index number 076-001-00-5
CAS number 20816-12-0


Chemical and physical data
Solubility 65 g/l (20 °C)
Melting point 40 °C
Molar mass 254.19 g/mol
Density 4.91 g/cm3 (20 °C)
Bulk density 1500 kg/m3
pH value 6 (25 g/l, H2O, 20 °C)
Boiling point 130 °C (1013 hPa)
Vapor pressure 10 hPa (20 °C)


Safety information
R Phrase R 26/27/28-34
Very toxic by inhalation, in contact with skin and if swallowed.Causes burns.
S Phrase S 7/9-26-45
Keep container tightly closed and in a well-ventilated place.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger very toxic, corrosive
Hazard Symbol Very toxic
Storage class Non combustible substances, toxic
WGK WGK 3 highly water endangering
Disposal 27
Residues containing valuable recoverable metals should be forwarded for recycling. Container H.


Transport information
Declaration (transport by sea) IMDG-Code UN 2471 OSMIUM TETROXIDE, 6.1, I, Marine Pollutant: P
Declaration (transport by air) IATA-DGR UN 2471 OSMIUM TETROXIDE, 6.1, I


Toxicological data
LD 50 oral LD50 rat 15 mg/kg