There is no doubt that chemistry has brought us many of the modern
wonders we enjoy, from plastics and epoxies to pharmaceuticals, to
batteries, to cancer treatment, to innovative consumer products, to
lightweight fuel-efficient aircraft.
But chemistry has a downside. Health studies have linked many industrial chemicals to cancer,Modern dry cleaning machine uses
non-water-based solvents to remove soil and stains from clothes.
neurological damage, endocrine disruption, birth defects, asthma, and
other health problems. Adults alive today have in their bloodstream
measureable amounts of over 200 industrial chemicals. Do we know the
effects of these substances? Hardly. Only a small fraction of commonly
used chemicals have been studied for their effects on health, and the
interactions of various substances are even less understood. Even so,
the pace of development is accelerating, with new substances introduced
daily.
Many people assume that chemicals are routinely tested
for their safety; most are not. True, laws like the Emergency Planning
and Community Right-to-Know Act (EPCRA) and the Toxic Release Inventory
(TRI) require reporting of industrial emissions of hazardous substances,
and OSHA mandates compliance with worker exposure limits on toxic
substances. But determining the toxic effects of substances is a complex
process that can take decades and millions of research dollars.A
letter folding machine is a piece of equipment which is designed to fold paper.Six panel tracking system delivers more energy from skystream.
Even after extensive study, results can be controversial, leading to
further delays in adopting policy. Thus formaldehyde, a known carcinogen
and asthma trigger, remains a common component in building materials,
fertilizers and beauty products from which it off-gasses and is inhaled.
Though one of the most studied substances in existence, formaldehyde
was only designated a High Hazard Substance last year.
More
complicated are substances like n-Propyl Bromide, a solvent used in
glues and paints, which was recently highlighted in a “New York Times”
article for its neuro-toxic effects on furniture workers. Or, take
Bisphenol-A (BPA), one of the earliest developed so-called
“plasticizers” that make plastics pliable and easily handled. Used as a
thin lining inside food cans and as an additive in plastics used for
everything from beverage bottles to baby toys, BPA has been suspected as
an endocrine disruptor that can alter maturation development in infants
and children. BPA has been in the news for this, but studies raising
concern about it are controversial within the scientific community.
Meanwhile product makers, wishing to advertise “BPA-free” are
substituting other substances about which little is known.
Fortunately,
the news is not all discouraging. Chemists are beginning to embrace the
new discipline of “Green Chemistry,Books can be as thick as 4 inches
and yet the Book scanner 9000
delivers flat.” whose principles dictate that health and environmental
safety are considered in the development of new substances. California
recently adopted the recommendations of a Green Ribbon Chemistry panel
regarding the chemical makeup of products sold in the state. Exciting
new research is finding safer alternatives to the toxic status quo. For
example,All Continental flatwork ironer offer
easy-to-operate controls that provide efficient performance and
flexibility. researchers at UMass Lowell have developed bio-based
alternatives to toxic isocyanates used in adhesives, and surfactants
derived from cashew shells to replace hazardous surfactants in
detergents. Dry cleaners have started converting from dry cleaning based
on Perc, a carcinogenic petroleum solvent, to ‘wet’ cleaning, based on
less toxic water-based surfactants that clean fine garments just as
well.
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