chemist of the day
Roy Plunkett – discoverer of Teflon
http://bit.ly/1zCyhFu
Every household has utensils that are coated with one particular type of material and even this material is slippery nature and highly resistant to chemicals and heat. During World War II this material was used to manufacture many products in Manhattan project. http://ow.ly/i/7KkMU
Monthly Archives: November 2014
Paper based electronic sensors, fool’s gold, computer model, dye-sensitized solar cells, triclosan
Paper based electronic sensors for medical tools
Flexible electronic sensors based on paper – an inexpensive material – have the potential to cut the price of a wide range of medical tools, from helpful robots to diagnostic tests… Read more
“Fool’s gold” can efficiently convert sunlight into electricity
As the installation of photovoltaic solar cells continues to accelerate, scientists are looking for inexpensive materials beyond the traditional silicon that can efficiently convert sunlight into electricity… Read more
New computer model could identify unknown chemical mechanisms
A new computer model could identify unknown chemical mechanisms that could improve energy production and storage, or the development of new medicines… Read more
New novel cathode to make cheap, flexible dye-sensitized solar cells
Rice University scientists have invented a novel cathode that may make cheap, flexible dye-sensitized solar cells practical. The newly created cathode from nanotubes that are seamlessly bonded to graphene and replaces the expensive and brittle platinum… Read more
Long time exposure to triclosan may cause liver fibrosis, cancer
Researchers at University of California, San Diego School of Medicine reported potentially serious consequences of long-term exposure to the triclosan… Read more
Artificial retina, greenhouse gases, Osteoporosis, twisting molecule, air purification
Artificial retina could help with vision loss
A new development toward a prosthetic retina could help counter conditions resulting from problems with this crucial part of the eye. The loss of eyesight, often caused by retinal degeneration, is a life-altering health issue for many people, especially as they age…. Read more
Newly developed molecule capable of binding to greenhouse gases
A team of University of Houston chemistry researchers have developed a molecule that assembles spontaneously into a lightweight structure with microscopic pores capable of binding large quantities of several potent greenhouse gases… Read more
Novel Nano-Medicine for Osteoporosis
In a new study, a group of researchers from Al-Ameen College of Pharmacy and Indian Institute of Science (IISc), Bangalore has developed novel single-dose therapeutics for osteoporosis… Read more
New novel method to twist molecule
Chemists have managed to twist a molecule in a novel way by different combined long molecular strands together. In this case, the longer strand winds like a stair railing around a central axis, which has special physical properties… Read more
Petrol from biomass…
Chinese scientists have overcome previous limitations to generate high octane number petrol from biomass-derived γ-valerolactone (GVL), an organic compound that is already often blended in small amounts with petrol or diesel… Read more
Low-cost alternatives for indoor air purification
Researchers introduce a new air-cleaning technology to purify low levels of indoor air pollution, a mix of volatile organic compounds and other gaseous substances that can accumulate in buildings… Read more
Triclosan – Chemical Properties, Applications
Triclosan
Name : Triclosan
Chemical name :
5-chloro-2-(2,4-dichlorophenoxy)phenol
5-chloro-2-(2,4-dichlorophenoxy)phenol
Structure : C12H7Cl3O2
Chemical properties
| Appearance | White Powdered Solid |
| Boiling Point | 120 °C |
| CAS Number | 3380-34-5 |
| Density | 1.49 g/cm3 |
| EINECS Number | 222-182-2 |
| Melting Point | 55-57 °C |
| Molar Mass | 289.54 g/mol |
| Molecular Formula | C12H7Cl3O2 |
| Solubility | soluble in organic compounds |
Applications of Triclosan
• Triclosan is effective against many different bacteria as well as some fungi and protozoa. It is widely used as an antiseptic, preservative and disinfectant in healthcare and personal care products.
• It is used as a biocide in many other personal care products such as deodorants, soaps and shower gels.
• Triclosan is used in toothpastes and other dental products to control plaque and improve the health of the gums.
• Many of the handwashes in hospitals and the detergents that medical personnel use to scrub up before surgery contain triclosan.
• Triclosan has been added to the surface of cutting boards, food storage containers and other kitchen utensils to stop microorganisms growing on them. However, since March 2010, triclosan cannot be used in the EU in food contact materials or as an additive in plastics that come into contact with food.
• Triclosan is used in biocidal products for veterinary hygiene but it is banned as a preservative in animal food.
• It is used as a biocide in many other personal care products such as deodorants, soaps and shower gels.
• Triclosan is used in toothpastes and other dental products to control plaque and improve the health of the gums.
• Many of the handwashes in hospitals and the detergents that medical personnel use to scrub up before surgery contain triclosan.
• Triclosan has been added to the surface of cutting boards, food storage containers and other kitchen utensils to stop microorganisms growing on them. However, since March 2010, triclosan cannot be used in the EU in food contact materials or as an additive in plastics that come into contact with food.
• Triclosan is used in biocidal products for veterinary hygiene but it is banned as a preservative in animal food.
TOXICITY of Triclosan
Triclosan tends to bioaccumulate, or become more concentrated in the fatty tissues of humans and other animals. As a result, this chemical has been detected in human breast milk, and in blood samples as well. Higher levels of triclosan in blood and breast milk are linked to use of body care products containing triclosan. Lab studies link triclosan to cancer, developmental defects, liver and inhalation toxicity.
SAFETY TIPS FOR HANDLING
Read the label before using cosmetics and personal care products. Cosmetics and personal care products that contain triclosan must say so on the label. If you want to avoid triclosan, check the list of ingredients. Always read and follow product instructions. For example, directions for mouthwashes that contain triclosan say to avoid swallowing the product. If you handle products containing triclosan in the workplace, talk to your health and safety representative about safe handling practices. Practice proper hand washing techniques using soap and water. Alcohol-based hand cleansers are useful when soap and water are not available.
ENVIRONMENTAL EFFECTS
Over 95 per cent of the uses of triclosan are in consumer products that are disposed of in residential drains. As a result, widespread use of triclosan and other antibacterial compounds result in contamination of the nation’s waterways, with triclosan being the most prevalent contaminant not removed by typical wastewater treatment plants. In fact, triclosan has been detected in wastewater, activated sludge, surface water, and sediments. Triclosan has been found to be highly toxic to different types of algae, keystone organisms for complex aquatic ecosystems, and has been detected at high concentration in earthworms. Triclosan is lipophilic and as a result is readily available for absorption and bioaccumulation in fatty tissues, especially by aquatic organisms.
Ebola, microrockets, hand blenders, uranium from sea water, new membrane, wood to chemicals…
Copper could help prevent spread of Ebola, say scientists
Copper could help prevent spread of Ebola, say scientistsResearch from the University of Southampton has indicated that copper could help to prevent the spread of Ebola… Read more
Water fuel microrockets to fight against chemical and biological weapons
With fears growing over chemical and biological weapons falling into the wrong hands, scientists are developing microrockets to fight back against these dangerous agents, which use water as fuel… Read more
Hand blenders emits chlorinated paraffins, finds new study
Eight out of twelve tested models of hand blenders are leaking chlorinated paraffins when used according to the suppliers’ instructions. This is revealed in a report from Stockholm University… Read more
New method to extract uranium from sea water
Scientists have long known that seawater contains small concentrations of valuable metals, but a technologically feasible extraction method has remained elusive… Read more
New membrane with adjustable pore size
A newly developed membrane, can be made more or less porous ‘on demand.’In this way, smart switching between ‘open’ and ‘closed’ is possible, which opens the way to innovative applications in biosensors, chemical analysis and catalysis… Read more
New method to convert wood into chemicals
Scientists disclosed a new method to convert lignin, a biomass waste product, into simple chemicals. The innovation is an important step toward replacing petroleum-based fuels and chemicals with biorenewable materials… Read more
world of chemicals 