Bisphenol A (BPA) chemical effect/concern for human body by consuming plastic button(garments),high quality clear plastics, plastic bottles & Tins Cans.

Description
Also known as BPA (CAS No 80-05-7), Bisphenol A is used as a building block to make plastics and polymers such as polycarbonate plastic and epoxy resins. When reacted with other substances it forms a polymer which is harmless, however, small amounts of unconverted BPA which is hazardous, can remain in the polymer and leach out of the finished plastic.

Chemically

Bisphenol A

 

 

 

Where they may be found/Possible application:

Polycarbonate plastic (identified for recycling by the number 7 or PC7) – a shatter resistant plastic used in high quality clear plastics such as CDs, DVDs, electrical household appliances, baby bottles and water cooler bottles, food containers, mobile phones, eyeglass lenses, cycle helmets, car lights and wing mirrors, medical equipment.
Epoxy resins – used for electrical laminates for printed circuit boards, composites, paints and adhesives.
Tins Cans – cured epoxy resins used as liners in tin cans for food and drinks.
PVC – sometimes used as an additive.

Bisphenol A is used in the production of plastics. It is a key monomer for polycarbonate. Polycarbonate for example is used in the production of baby bottles and epoxy resins which could be relevant for coatings.
Furthermore BPA is known as a component of paper receipts. It ensures the black font after printing.

Reason for concern/Effects:
Humans – trace amounts of BPA, thought to have originated from tin can linings and/or baby bottles have been found in the human body. BPA has been extensively studied by the industry and used in consumer products for over 50 years. It is known to be a weak endocrine disruptor and mimic the female hormone oestrogen and also claimed to be a suspected carcinogen. Although limits have been set for their safe use within the industry, these are disputed by some NGOs who argue than even in small trace amounts, BPA is harmful. Further work is needed on the negative effects of BPA.

Bisphenol A is classified as an endocrine disruptor because of its estrogenic effect. It mimics the body´s own hormone and may lead to negative health effects such as birth defects or male infertility.

Exposure:
Humans – from ingestion of tinned food and drink contaminated with BPA from the lining of the can or from polycarbonate drinking bottles.
Environment – thought to be released from products when incinerated or disposed of in landfill sites.

Alternatives:
Epoxy resins – as yet no viable alternatives to using epoxy resins on the inside of cans.
Polycarbonates – some polyamide (nylon) based plastics are available though on a fairly small scale at the moment.

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