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12103 Osmium(VIII) oxide, 99.8% (metals basis), Os 74.4% min

CAS Number
Osmic acid
Osmium tetroxide

Stock No. Size Price ($) Quantity Availability
12103-02 0.5g 99.00
12103-03 1g 156.00
12103-48 *10x1g 1340.00
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Osmium(VIII) oxide, 99.8% (metals basis), Os 74.4% min


Chemical Properties

Formula Weight
Melting point
Boiling Point
Storage & Sensitivity
Ambient temperatures.
Soluble in chloroform, alcohol and ethers.Soluble in water, organic solvents, benzene, alcohol, ether, ammonium hydroxide, phosphorus oxychloride and carbon tetrachloride.


Oxidation, catalyst in Sharpless dihydroxylations Osmium(VIII) oxide is used in the Sharpless oxyamination to give vicinal amino-alcohols. It is used to oxidize alkenes to the vicinal diols. It acts as a staining agent used in transmission electron microscopy to provide contrast to the image and as a stain for lipids in optical microscopy. As a polymer stain, it is also used to stain selectively copolymers especially styrene-butadiene block copolymers. Further, it is involved in the synthesis of Isosteviol.


Special handling precautions required. View MSDS prior to purchase. MSDS are available online at in a cool place.Incompatible with strong acids, hydrogen chloride, organic materials and finely powdered metals.

Literature References

Gally, C.; Nestl, B. M.; Hauer, B. Engineering Rieske Non-Heme Iron Oxygenases for the Asymmetric Dihydroxylation of Alkenes. Angew. Chem. Int. Ed. 2015, 54 (44), 12952-12956.

Cheng, W.; Kumar, J. N.; Zhang, Y.; Liu, Y. pH-and redox-responsive self-assembly of amphiphilic hyperbranched poly(amido amine)s for controlled doxorubicin delivery. Biomater. Sci. 2015, 3 (4), 597-607.

GHS Hazard and Precautionary Statements

Hazard Statements: H300+H310+H330-H314-H335

Fatal if swallowed. Fatal in contact with skin. Fatal if inhaled. Causes severe skin burns and eye damage. May cause respiratory irritation.

Precautionary Statements: P260-P262-P264b-P270-P271-P280-P284-P303+P361+P353-P304+P340-P305+P351+P338-P310-P330-P331-P363-P501c

Do not breathe dust/fume/gas/mist/vapours/spray. Do not get in eyes, on skin, or on clothing. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. Wear respiratory protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Rinse mouth. Do NOT induce vomiting. Wash contaminated clothing before reuse. Dispose of contents/ container to an approved waste disposal plant

Other References

Hazard Class
Packing Group
Harmonized Tariff Code


  • A11009

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  • A13298

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  • A19802

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