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EC number: 200-001-8
CAS number: 50-00-0
Valid distribution models identified water and air as exclusive target compartments of the test item (BASF 2008) with a high preference for the water phase based on the low Henry’s Law constant of 0.034 Pa m3/mol at 25 °C (Betterton and Hoffman 1988). In water the test item reacts to the non-toxic hydrate methylene glycol according to an equilibrium reaction shifted almost completely towards the product methylene glycol (Keq(25°C) = 1.82 *103) with a quantity of > 99.9% in aqueous solutions. In addition, different biotic and abiotic degradation processes take place in in water and air such as aerobic and anaerobic biodegradation (Eiroa et al. 2006; Fraunhofer IME 2011) or direct and indirect photolysis (Atkinson et al. 1997; Howard 1991). So the monomolecular form of the test item is not present in the target compartments in relevant concentrations. In conclusion, an exposure of organisms to significant concentrations is very unlikely and accumulation in organisms is not expected due a low log Kow (0.35). Contrary to the assumed toxic potential based on the chemical properties as highly reactive aldehyde, no hazard for environmental organism could be identified due to the short existence of the monomolecular form of the test item.
Beside anthropogenic emission, the test item occurs naturally in the environment as it is the product of many natural processes for example biomass combustion such as bushfires or irradiation of humic substance by sunlight. Since the test item is a common metabolic intermediate, it is present in most living organisms (Chénier 2003) and organism are well adapted to these concentrations. Due to the reactivity and rapid degradation in water and air the exposure to soil, aquatic or sediment organisms to hazardous concentrations of the test item is, if occurring at all, verry low. In conclusion, no environmental risk is expected for the test item.
A detailed hazard assessment and conclusion is made in the attached document.
L(E)C50 values from studies on acute aquatic toxicity of formaldehyde are > 1 mg/L for all 3 trophic levels. The test item is readily biodegradable and has no potential for bioaccumulation.
In addition a NOEC (21 d) of 1.04 mg/L from a reproduction study conducted with Daphnia magna is available.
In conclusion formaldehyde does not need to be classified for environmental effects.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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