Hospitals are one of the pollutant sources that produce a
wide variety of chemical substances owing to medical, laboratory
and research activities. Formaline, a mixture of 37%
formaldehyde, 10% methanol and water, is frequently found
in hospital waste streams. It is used as an embalming solution
for preserving biological samples [1]. The direct discharges of
this waste can threaten life in the receiving water. The contact
of this toxic substance with aquatic ecosystems leads to a risk
directly related to the existence of hazardous substances, which
could have potential negative effects on the biological balance