Formerly Material Safety Data Sheet or MSDS
Product Name: Ozone
Common Names/Synonyms: Triatomic Oxygen, Trioxygen, O3
Ozone Generator Manufacturer/Supplier
Product Use: This SDS is limited to ozone produced in gaseous form on site by an ozone
generator, in varying concentrations in either air or aqueous solution, for the purposes of odor
abatement, oxidation of organic compounds, or antimicrobial intervention, in a variety of
applications, from food processing to ground water remediation.
|Physical Hazards||Health Hazards||Environmental Hazards|
|Oxidizing Gas||Skin Irritation - Category 3||Acute Aquatic Toxicity - Category 1|
|Eye Irritation - Category 2B|
|Respiratory Systemic Toxicity - Category 1 (Acute & Repeated Exposures)|
NOTE: Severe respiratory toxicity will develop before skin or eye irritation go beyond listed categories. Anyone with chronic pulmonary problems, especially asthma, should avoid exposure to ozone.
|WHMIS Classifications (Workplace Hazardous Materials Information System, Canada)|
|D1A||Acute lethality - Very toxic, immediately||C||Oxidizing|
|D2A||Chronic Toxicity - Very Toxic||F||Dangerously Reactive|
|D2B||Mutagenicity - Toxic|
|Route of Entry||Symptoms||First Aid|
|Skin Contact||YES||Irritation||Rinse with water|
|Eye Contact||YES||Irritation||Rinse with water, remove contacts|
|Inhalation||YES||Headache, cough, dry throat, heavy chest, shortness of breath||Remove to fresh air, provide oxygen therapy as needed|
While ozone itself is not flammable, it is a strong oxidant and may accelerate, even initiate, combustion, or cause explosions. Use whatever extinguishing agents are indicated for burning materials.
Turn off ozone generator, and ventilate the area. Evacuate the area until ozone levels subside.
Ozone must be contained within ozone-resistant tubing and pipes from the generation point to the application point. Any leaks must be repaired before further use.
OSHA Permissible Exposure Limit: 8 hour Time Weighted Average 0.1 ppm
ANSI/ASTM: 8 hour TWA 0.1 ppm, Short Term Exposure Limit 0.3 ppm
ACGIH: 8 hour TWA 0.1 ppm; STEL 0.3 ppm
NIOSH: Exposure Limit Ceiling Value 0.1 ppm light; 0.08 ppm moderate; 0.05 ppm, heavy;
Light, moderate, heavy work TWA <= 2 hours, 0.2 ppm
Immediately Dangerous to Life or Health 5 ppm
Respiratory Protection: Use full face self-contained breathing apparatus for entering areas with
high concentration of ozone.
Engineering controls: use ozone destruct units (thermal and/or catalytic) for off gassing ozone.
|Molecular weight||48.0||Flash point||NA|
|Appearance||Clear at low concentrations, blue at higher concentrations||Evaporation rate||NA|
|Odor||Distinctive pungent odor||Flammability||NA|
|Odor threshold||0.02 to 0.05 ppm; exposure desensitizes||Explosive limits||NA|
|Melting point||-193°C/-315°F||Relative density||NA|
|Boiling point||-112°C/-169°F||Partition coefficient||NA|
|Vapor pressure||> 1 atm||Auto-ignition temperature||NA|
|Vapor density||1.6 (air=1)||Decomposition temperature||NA|
|Solubility in water||570mg/L @ 20°C, 100% O3, 0.64 @ 0°C (vol/vol)||Viscosity||NA|
Ozone is highly unstable and highly reactive. Avoid contact with oxidizable substances, including alkenes, benzene and other aromatic compounds, rubber, dicyanogen, bromine diethyl ether, dintrogen tetroxide, nitrogen trichloride, hydrogen bromide, and tetraluorohydrazine. Ozone will readily react and spontaneously decompose under normal ambient temperatures.
Likely routes of exposure: inhalation, eyes, skin exposure.
Effects of Acute Exposure: Discomfort, including headache, coughing, dry throat, shortness of breath, heavy feeling in chest (including possible pulmonary edema/fluid in the lungs); higher levels of exposure intensify symptoms. Irritation of skin and/or eyes is also possible.
Effects of Chronic Exposure: Similar to acute exposure effects, with possible development of chronic breathing disorders, including asthma.
Inhalation LC50: mice, 12.6 ppm for 3 hours; hamsters, 35.5 ppm for 3 hours
|Irritancy of Ozone||YES|
|Sensitization to Ozone||NO|
|Reproductive Toxicity||Not Proven|
|Toxicologically Synergistic Products||Increase susceptibility to allergens, pathogens, irritants|
The immediate surrounding area may be adversely affected by an ozone release, particularly plant life. Discharge of ozone in water solution would also be harmful to any aquatic life. Due to natural decomposition, bioaccumulation will not occur, and the area affected would be limited.
Off-gassing of ozone should be through an ozone destruct unit which uses heat and/or a catalyst to accomplish the breakdown of ozone to oxygen before release into the atmosphere.
NOT APPLICABLE, as ozone is unstable and either reacts with other substances in the environment or decomposes, and therefore must be generated at the location and time of use.
SARA = Superfund Amendments and Renewal Act
SARA Title III Section 302 Extremely Hazardous Substance TPQ: 100 lbs.
SARA Title III Section 304, EHS RQ: 100 lbs.
SARA Title III Section 313: Ozone is reportable if more than 10,000 lbs. are used/year.
TPQ (Threshold Planning Quantity) requires emergency planning activities if this amount is on site at any time during year
RQ (Reportable Quantity) requires any release of this amount into the environment to be reported to the National Response Center
Source: EPA List of Lists
The half-life of ozone is much shorter in water than in air. Increased temperature in either solvent decreases the half-life. Published research indicates a half-life of 20 minutes for ozone dissolved in water at 20°C, and a half-life of approximately 25 hours for ozone in dry air at 24°C (McClurkin & Maier, 2010). The practical half-life time is actually less, especially in air, due to air circulation, humidity, the presence of contaminants or walls with which to react, etc. In many situations, with air movement, warmer temperatures, and normal relative humidity, the half-life of ozone in air could be 1 hour or less. Further, ventilation of a closed space to other areas will also disperse the ozone, so that concentration levels can rapidly decrease after generation ceases.
Canadian Centre for Occupational Health and Safety: Chemical Profiles: Ozone
Haz-Map: Occupational Exposure to Hazardous Agents: Ozone
International Chemical Safety Cards #0068: Ozone
NIOSH Pocket Guide to Chemical Hazards: Ozone http://www.cdc.gov/niosh/npg/npgd0476.html
United States National Library of Medicine ChemIDplus Lite: Ozone 10028-15-6
Disclaimer: Ozone Solutions provides this information in good faith, but makes no claim as to its comprehensiveness or accuracy. It is intended solely as a guide for the safe handling of the product by properly trained personnel, and makes no representations or warranties, express or implied, of the merchantability or fitness of the product for any purpose, and Ozone Solutions will not be responsible for any damages resulting from the use of, or reliance upon, this information.
Preparer: Tim McConnel, Ozone Solutions
Date of Preparation: 5/1/2012
Last Updated: September 11, 2012