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EC number: 200-001-8
CAS number: 50-00-0
Natural occurance is described in Chenier, 2003 based on several publications:
Formaldehyde occurs naturally in the environment and is the product of many natural processes. It is released during biomass combustion, such as forest and bush fires (Howard 1989; Reinhardt 1991). In water, it is also formed by the irradiation of humic substances by sunlight (Kieber et al. 1990). As a metabolic intermediate, formaldehyde is present at low levels in most living organisms (WHO 1989; IARC 1995). Studies have found it to be emitted by bacteria, algae, plankton and vegetation.
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