In Bangladesh, different food items are reported to be adulterated by unsafe chemicals at different marketing steps
from farms to consumers. The fresh fish are sprayed with or dipped into formalin by the fish traders while transporting
through domestic market chain2. Formalin is carcinogenic, allergenic and induce genotoxicity. Formalin recently
classified by the International Agency for Research on Cancer (IARC) in the Group 1 ‘‘as carcinogenic to humans’’3.
Chemical reaction of added formalin with fish composition could produce toxic product (adduct) and have residual
harmful effects to the consumer.