General Information
Version
5
Revision date
2026-08-03
Product name
Osmium(VIII) oxide, 4% aqueous solution
Product Synonyms
Osmic acid
CAS No.
20816-12-0
supplier name
Avocado Research Chemicals Ltd
Emergency telephone
001-201-796-7100, +32 14 57 52 99, 001-800-424-9300, 001-703-527-3887
Icons in SDS
Company Information
company name
Avocado Research Chemicals Ltd
e-mail address of the competent person responsible for the Safety Data Sheet
begel.sdsdesk@thermofisher.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H310, H315, H318, H332, H334
Hazard statements
Code
Statements
H310
Fatal in contact with skin
Section 2
SECTION 2: Hazards identification
Physical State
Appearance/Odor
Liquid Yellow Slight chlorine Emergency Overview Fatal in contact with skin. Causes serious eye damage. Causes skin irritation. Harmful if inhaled. May cause allergy or asthma symptoms or breathing difficulties if inhaled. Classification of the substance or mixture Acute Dermal Toxicity Category 2 Acute Inhalation Toxicity - Vapors Category 4 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 1 Respiratory Sensitization Category 1 Label Elements
Signal word
Danger Hazard Statements H310 - Fatal in contact with skin H318 - Causes serious eye damage H315 - Causes skin irritation H332 - Harmful if inhaled H334 - May cause allergy or asthma symptoms or breathing difficulties if inhaled
Prevention
P261 - Avoid breathing dust/fume/gas/mist/vapors/spray P262 - Do not get in eyes, on skin, or on clothing P264 - Wash face, hands and any exposed skin thoroughly after handling P270 - Do not eat, drink or smoke when using this product P271 - Use only outdoors or in a well-ventilated area P280 - Wear protective gloves/protective clothing/eye protection/face protection P284 - In case of inadequate ventilation wear respiratory protection
Response
P304 + P340 - IF INHALED: Remove person to fresh air and keep comfortable for breathing P305 + P351 + P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing P310 - Immediately call a POISON CENTER or doctor P342 + P311 - If experiencing respiratory symptoms: Call a POISON CENTER or doctor P302 + P352 - IF ON SKIN: Wash with plenty of soap and water P361 + P364 - Take off immediately all contaminated clothing and wash it before reuse
Storage
P405 - Store locked up
Disposal
P501 - Dispose of contents/ container to an approved waste disposal plant
Other physicochemical hazards
None identified.
Health hazards
Fatal in contact with skin. Causes serious eye damage. Corrosive. Causes eye burns. Causes skin irritation. Harmful if inhaled. May cause allergy or asthma symptoms or breathing difficulties if inhaled.
Environmental hazards
Contains no substances known to be hazardous to the environment or not degradable in waste water treatment plants. . Will likely be mobile in the environment due to its water solubility. The product is water soluble, and may spread in water systems.
2.3 Other hazards
This product does not contain any known or suspected endocrine disruptors.
2.1 Classification of the substance or mixture
Acute Dermal Toxicity Category 2 Acute Inhalation Toxicity - Vapors Category 4 Skin Corrosion/Irritation Category 2 Serious Eye Damage/Eye Irritation Category 1 Respiratory Sensitization