Liquefied petroleum gases (Stream 4 petroleum and refinery gases) - information sheet
Petroleum gases, liquefied
CAS Registry Number 68476-85-7
Petroleum gases, liquefied, sweetened
CAS Registry Number 68476-86-8
Updated March 6, 2019:
The Final Screening Assessment for Liquefied Petroleum Gases was published in February 2017 under the Chemicals Management Plan (CMP). The assessment is summarized in this information sheet (formerly public summary) and has not changed. The section in this information sheet entitled "Preventive actions and reducing risk" communicates updates in risk management activities, namely:
- The publication of the proposed Regulations Respecting Reduction in the Release of Volatile Organic Compounds (Petroleum Sector), to reduce unintentional releases of volatile organic compounds (VOCs), including petroleum and refinery gases (PRGs), from petroleum sector facilities.
On this page
- About these substances
- Human and ecological exposures
- Key health and ecological effects (hazard)
- Risk assessment outcomes
- Preventive actions and reducing risk
- Related information
- The Government of Canada conducted a science-based evaluation, called a screening assessment, of 2 liquefied petroleum gases (LPGs) to address the potential for harm to Canadians and to the environment.
- Under the Canadian Environmental Protection Act, 1999 (CEPA 1999), the risk posed by a substance is determined by considering both its hazardous properties (its potential to cause adverse human health or ecological effects) and the amount of exposure there is to people and the environment. A substance may have hazardous properties; however, the risk to human health or to the environment may be low depending upon the level of exposure.
- As a result of the screening assessment, the Government concluded that these substances are harmful to human health, but not to the environment, at levels of exposure at the time of the assessment.
About these substances
- The screening assessment focuses on 2 substances referred to collectively under the CMP as LPGs in the Petroleum Sector Stream Approach (Stream 4).
- LPGs are gases, but can be liquefied under pressurized or cooling conditions to be conveniently stored or transported. These substances are composed of complex combinations of petroleum hydrocarbons.
- LPGs are similar in composition to site-restricted petroleum and refinery gases (Stream 1) and industry-restricted petroleum and refinery gases (Stream 2), but can also be used in products available in the marketplace.
- According to information gathered by the Government, LPGs are mainly used as fuels, raw materials for industrial processes, and as aerosol propellants in products available to consumers.
- They can be used as cooking or heating fuels, and are often stored in cylinder tanks which are available to consumers.
Human and ecological exposures
- Canadians may be exposed to LPGs during the indoor use of aerosol products containing LPGs as aerosol propellants.
- Canadians living in the vicinity of petroleum facilities or filling stations may also be exposed to LPGs from unintentional releases of the substances.
- LPGs may be released to the environment during transportation and transferring, and during use of aerosol products available to consumers.
Key health and ecological effects (hazard)
- Potential carcinogenicity (ability to cause cancer) was considered to be the important or "critical" effect for these substances, used for characterizing the risk to human health in the assessment.
- No ecological effects have been identified for these substances.
Risk assessment outcomes
- Based upon the information presented in the screening assessment, it was determined that these substances may pose a risk to human health, as there is a small portion of Canadians that may be exposed in the vicinity of petroleum facilities.
- It was also determined that there is low risk of harm to the environment from these substances.
- The Government published the Final Screening Assessment for Liquefied Petroleum Gases on February 25, 2017.
Screening assessment conclusions
- As a result of the screening assessment, the Government concluded that these 2 substances are harmful to human health, at levels of exposure at the time of the assessment.
- The Government also concluded that these substances are not entering the environment at levels that are harmful to the environment at the time of the assessment.
Preventive actions and reducing risk
- The Government published the Risk Management Approach for Liquefied Petroleum Gases for public comment on February 25, 2017.
- On April 4, 2018, the 2 liquefied petroleum gases were added to Schedule 1 of CEPA 1999, also called the List of Toxic Substances.
- On May 27, 2017, the proposed Regulations Respecting Reduction in the Release of Volatile Organic Compounds (Petroleum Sector) were published. These regulations would reduce releases of VOCs, including LPGs, from petroleum sector facilities.
- LPGs may be found in products available to consumers. Canadians should follow any safety warnings and directions on product labels and dispose of products responsibly.
- Canadians who may be exposed to these substances in the workplace should consult with their employer and an occupational health and safety (OHS) representative about safe handling practices, applicable laws, and requirements under OHS legislation and the Workplace Hazardous Materials Information System (WHMIS).
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