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Isocyanate
Safety and Health Topics Isocyanates Occupational Safety and Health Administration.
Safety and Health Topics. Isocyanates are compounds containing the isocyanate group NCO. They react with compounds containing alcohol hydroxyl groups to produce polyurethane polymers which are components of polyurethane foams thermoplastic elastomers spandex fibers and polyurethane paints. Isocyanates are the raw materials that make up all polyurethane products. Jobs that may involve exposure to isocyanates include painting foam-blowing and the manufacture of many Polyurethane products such as chemicals polyurethane foam insulation materials surface coatings car seats furniture foam mattresses under-carpet padding packaging materials shoes laminated fabrics polyurethane rubber and adhesives and during the thermal degradation of polyurethane products.
Isocyanate Definition of Isocyanate by Merriam-Webster.
An Encyclopædia Britannica Company. WORD OF THE DAY. noun isocyanate s-s-nt nt. Check your grammar now! an ester of isomeric cyanic acid used especially in plastics and adhesives. Origin and Etymology of isocyanate. First Known Use 1872. Learn More about isocyanate. Britannica.com Encyclopedia article about isocyanate. What made you want to look up isocyanate? Please tell us where you read or heard it including the quote if possible. WORD OF THE DAY. a connection or link. Get Word of the Day daily email!
Isocyanates in the workplace Exposure effects and control 2013-11-25 SafetyHealth Magazine.
Isocyanates are known to be present in rigid or flexible foams surface coatings paints electrical wire insulation adhesives rubbers and fibers. The most commonly used isocyanate compounds are diisocyanates which contain two isocyanate groups. The more common diisocyanates are toluene diisocyanate methylene diphenyl diisocyanate and hexamethylene diisocyanate. The health effects of isocyanate exposure include occupational asthma skin irritation dermatitis irritation to the mucous membranes eyes nose and throat gastrointestinal irritation chemical bronchitis and pneumonitis. Although symptoms may improve after the irritant is removed acute asthma attacks may occur after renewed exposure to isocyanates even if the exposure is very small or very brief. Dermal sensitivity as a result of overexposure to isocyanates may result in rash itching hives and swelling of extremities.
Isocyanates HSL.
Biological monitoring can be carried out by anyone who understands the principles see HSE's guidance but you may find it convenient to arrange annual isocyanate testing as part of your health surveillance health surveillance is required for workers using isocyanates. HSL offers UKAS-accredited biological monitoring analysis for HDI and IPDI found in spray paints TDI foams and glues and MDI resins and hardeners. A urine sample is required and should be taken at the end within an hour of a period of potential exposure. Sampling should reflect normal working practice. Urine samples should be collected in bottles containing a citric acid preservative. HSL provides bottles and packaging as part of the analysis cost.
Isocyanate Exposure Reaction and Protection Quick Tips 233 Grainger Industrial Supply.
Exposure Limits for Air Contaminants. Supplied Air Respirator Standards. Isocyanate Exposure Reaction and Protection. Isocyanates are widely used and found in many industries and occupations including painting construction shipbuilding upholstery manufacturing and firefighting. Isocyanates have been used in the United States since the 1950s and are produced by reacting a primary aliphatic or aromatic amine dissolved in a solvent such as xylene or monochlorobenzene with phosgene dissolved in the same solution. They contain two OASH-NCO cyanato groups attached to an organic radical and react exothermically with compounds containing active hydrogen atoms to form a polymeric mass polyurethane.
Isocyanates HSL.
Biological monitoring can be carried out by anyone who understands the principles see HSE's guidance but you may find it convenient to arrange annual isocyanate testing as part of your health surveillance health surveillance is required for workers using isocyanates. HSL offers UKAS-accredited biological monitoring analysis for HDI and IPDI found in spray paints TDI foams and glues and MDI resins and hardeners. A urine sample is required and should be taken at the end within an hour of a period of potential exposure. Sampling should reflect normal working practice. Urine samples should be collected in bottles containing a citric acid preservative. HSL provides bottles and packaging as part of the analysis cost.
Isocyanate Wikipedia.
Jump to navigation search. Not to be confused with Isocyanide. The isocyanate functional group. Isocyanate is the functional group with the formula RNCO. Organic compounds that contain an isocyanate group are referred to as isocyanates. An isocyanate that has two isocyanate groups is known as a di-isocyanate. Di-isocyanates are manufactured for reactions with polyols in the production of polyurethanes a class of polymers. Isocyanates should not be confused with cyanate esters and isocyanides whose behaviors are very different. The cyanate cyanate ester functional group ROCN is arranged differently than the isocyanate group RNCO. Isocyanides have the connectivity R-NC lacking the oxygen of the cyanate groups.
Isocyanates Controlling hazardous substances Managing occupational health risks in construction.
Seek specialist help if you are unsure. Where the risks are judged to be low simple and inexpensive controls will suffice. For other tasks like spraying you will have to do more. The range of isocyanate containing products and the tasks you can use these for mean that you must decide on the specific controls you need based upon your assessment of the risks. Take specialist help if you unsure about this. Give priority to the greatest risks first. Prevent Where possible think about eliminating or reducing isocyanate risks. using products that do not contain isocyanates or less volatile forms. This causes more isocyanate to get into the air compared to using a brush or roller. being aware of anyone who is already sensitised to isocyanates.

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