Synonym(s): Osmic acid, Osmium tetroxide
Formula: OsO4
Formula weight: 254.10
Purity: 99.8% (metals basis), Os 74.4% min
CAS Number: 20816-12-0
UN Number: UN2471
Hazard Class: 6.1
Packing Group: I
Harmonized Tariff Code: 2843.90
Hazard Statements: H300-H310-H330-H314
Fatal if swallowed. Fatal in contact with skin. Fatal if inhaled. Causes severe skin burns and eye damage.
Precautionary Statements: P260-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P320-P330-P361-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. 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. Specific treatment is urgent (see label). Rinse mouth. Remove/Take off immediately all contaminated clothing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.
Risk Phrases: 26/27/28-34
Very toxic by inhalation, in contact with skin and if swallowed. Causes burns.
Safety Phrases: 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).