Bleaching agents and azo dyes Textile industry in Bangladesh

bangladeshi leather industry. 0.5 million residents of bangladesh capital, dhaka @ risk of serious health issues due chemical pollution tanneries near homes.

there wide range of chemicals utilized in textile production dyeing , printing, these workers can exposed to. these chemicals include not limited bleaching agents , azo dyes. azo dyes, such aniline , benzadine, accounting on 50% of dyes produced annually of 2006. due high stability in light , washing resistance microbial activity. toxic effects of these dyes include hypersensitivity , irritant effects such contact dermatitis , asthma, exposure related concerns such malignancies bladder, nasal, esophagus, stomach, colon, rectal, nasopharyngeal , lung cancers. studies have postulated hypersensitivity effects may due alterations in neutrophil function , sensitization, contributing chronic inflammatory diseases of skin , respiratory tract. once sensitization has occurred, individual becomes more susceptible developing allergic disease on subsequent contact offending agent. exposure these chemicals typically occurs via direct contact skin or inhalation of dye particles. while of 2006 there no evidence suggest dyestuffs in use in these industries harmful @ levels workers exposed to, there concern long term or accidental over-exposure. long term or excessive exposure can sensitize worker’s immune system, leading hypersensitivity reactions such asthma , atopic dermatitis on subsequent exposure mentioned above. additionally, studies have demonstrated concerns regarding exposure textile dyes , occupational bladder cancer due aniline dye intermediates such beta-naphthylamine , benzidine, has long been identified human urinary carcinogen. latency period between exposure , diagnosis has been estimated @ 23 years. of 2006, screening recommendations detection of long term health effects dye exposure included hematologic testing microcytic anemia , leukopenia. however, many females working in industry did not have access such screening , surveillance due lack of quality medical care.