Bisphenol S ( CPM ) is an organic compound of formula (HOC 6 H 4 ) 2 SO 2 . It has two functional groups of phenol on both sides of the sulfonyl group. It is commonly used in curing fast dry epoxy resin adhesives. This is bisphenol, and the near analog bisphenol A (BPA) in which the dimethylmethylene group (C (CH 3 ) 2 ) is replaced by a sulfon group (SO 2 ).
Video Bisphenol S
Use
BPS is used to cure fast drying epoxy glue and as a corrosion inhibitor. It is also commonly used as a reactant in polymer reactions.
BPS has become increasingly common as a building block in polycarbonate and some epoxies, following public awareness that BPA has the imitative properties of estrogen, and the widespread belief that enough left in the product becomes dangerous. However, BPS may have an estrogenic effect comparable to BPA. BPS is now used for a variety of general consumer products. In some cases, BPS is used where a legal ban on CPA allows products (especially plastic containers) containing CPM to be labeled "free CPA". BPS also has a more stable gain against heat and light than CPA.
To comply with BPA restrictions and regulations due to their confirmed toxicity, the manufacturer is gradually replacing BPA with other related compounds, especially bisphenol S, in lieu of in industrial applications.
BPS is also used as an anti-corrosive agent in epoxy glue. Chemically, BPS is used as a reagent in polymer reactions. BPS has also been reported to occur in canned foodstuffs, such as cans.
In a recent study analyzing BPS in various paper products worldwide, BPS is found in 100% of tickets, mailing envelopes, airline tickets, and airplane baggage tags. In this study, very high concentrations of BPS were detected in samples of thermal reception collected from cities in the United States, Japan, Korea, and Vietnam. BPS concentrations are large but vary greatly, from several tens of nanograms per gram to several milligrams per gram. However, the concentration of BPS used in thermal paper is usually lower than that of BPA. Finally, BPS can enter the human body through the absorption of the skin from handling paper money.
Maps Bisphenol S
Environmental considerations
Recent work shows that, like CPA, BPS also has endocrine disruptive properties. What makes BPS, and BPA, endocrine disruptors are the presence of hydroxy groups on benzene rings. This phenol part allows BPA and BPS to mimic estradiol. In human urine studies, BPS was found in 81% of the samples tested. This percentage is proportional to the BPA found in 95% of urine samples. Another study conducted on thermal receipt paper showed that 88% of human exposure to BPS is via a receipt.
Thermal paper recycling can introduce BPS into the paper production cycle and cause BPS pollution from other types of paper products. A recent study has shown BPS in more than 70% of household waste paper samples, potentially indicating the spread of BPS pollution through paper recycling.
BPS is more resistant to environmental degradation than the BPA, and although not persistent can not be characterized as easily decomposed.
History
BPS was first created in 1869 as a dye and is currently commonly used in everyday consumer products. CPM is an analogue of CPA that has replaced BPA in various ways, present on indoor thermal, plastic and dust receipt paper. Once the health problems associated with bisphenol A grow in 2012, BPS is being used as a substitute.
Rule
It is difficult for consumers to determine whether a product contains BPS due to limited labeling regulations.
Synthesis
Bisphenol S is prepared by the reaction of two equivalents of phenol with one equivalent of sulfuric acid or oleum.
- 2 C 6 H 5 OH H 2 SO 4 -> (C 2 O 2 6 H 5 OH SO 3 -> (C 6 H 4 OH) 2 SO 2 H 2 O
This reaction can also produce 2,4'-sulphonitifenol, a common isomeric complication in electrophilic aromatic substitution reactions.
References
Source of the article : Wikipedia
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