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Ethylene glycol ethers: an environmental risk assessment
C A Staples1, R J Boatman, M L Cano
1Assessment Technologies, Inc., Fairfax, VA 22030, USA.
Chemosphere
|March 21, 1998
Summary
Ethylene glycol ethers and acetates are widely used but do not persist in the environment or bioaccumulate. They exhibit low aquatic toxicity and pose minimal chronic risks to aquatic life.
Area of Science:
- Environmental Chemistry
- Ecotoxicology
- Industrial Chemical Safety
Background:
- Ethylene glycol ethers and acetates are common industrial chemicals.
- They are utilized as intermediates, solvents, and plasticizers in various commercial products.
- Environmental release occurs via manufacturing effluents, emissions, and product use.
Purpose of the Study:
- To assess the environmental fate of ethylene glycol ethers and acetates.
- To evaluate the toxicity of these compounds to aquatic organisms.
- To determine potential exposure risks and their implications for aquatic life.
Main Methods:
- Environmental persistence and bioaccumulation potential were investigated.
- Acute aquatic toxicity testing was conducted.
- Exposure concentrations were conservatively calculated and compared to toxicity thresholds.
Main Results:
- Ethylene glycol ethers and acetates demonstrate low environmental persistence.
- These compounds are not bioaccumulative in aquatic systems.
- Acute toxicity data classify them as "practically non-toxic" to aquatic organisms by U.S. EPA standards.
- Calculated chronic exposures are generally below levels of concern for aquatic life.
Conclusions:
- Ethylene glycol ethers and acetates pose a low environmental risk due to their non-persistent and non-bioaccumulative nature.
- Their low acute and chronic toxicity to aquatic organisms further supports a favorable environmental profile.
- Current usage patterns and environmental release do not present significant ecological threats to aquatic ecosystems.