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1240 Date: December 1999 Revision: January 2009 DOT Number: UN 2534

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1240 Date: December 1999 Revision: January 2009 DOT Number: UN 2534 Right to Know Hazardous Substance Fact Sheet Common Name: METHYL CHLOROSILANE Synonym: Chloromethylsilane CAS Number: 993-00-0 Chemical Name: Silane, Chloromethyl- RTK Substance Number: 1240 Date: December 1999 Revision: January 2009 DOT Number: UN 2534 Description and Use EMERGENCY RESPONDERS >>>> SEE LAST PAGE Methyl Chlorosilane is a colorless gas with a distinctive odor. Hazard Summary It is used to make water repellant materials. Hazard Rating NJDOH NFPA HEALTH 3 - FLAMMABILITY 4 - REACTIVITY 2 W - CORROSIVE FLAMMABLE AND REACTIVE Reasons for Citation POISONOUS GASES ARE PRODUCED IN FIRE f Methyl Chlorosilane is on the Right to Know Hazardous CONTAINERS MAY EXPLODE IN FIRE Substance List because it is cited by DOT. f This chemical is on the Special Health Hazard Substance Hazard Rating Key: 0=minimal; 1=slight; 2=moderate; 3=serious; 4=severe List. f Methyl Chlorosilane can affect you when inhaled. f Methyl Chlorosilane is a DOT CORROSIVE material and contact can severely irritate and burn the skin and eyes. f Inhaling Methyl Chlorosilane can irritate the nose, throat and lungs. f Methyl Chlorosilane can cause chronic bronchitis with SEE GLOSSARY ON PAGE 5. coughing, phlegm and shortness of breath. f Methyl Chlorosilane is FLAMMABLE and REACTIVE and a DANGEROUS FIRE and EXPLOSION HAZARD. FIRST AID Eye Contact f Immediately flush with large amounts of water for at least 30 minutes, lifting upper and lower lids. Remove contact Workplace Exposure Limits lenses, if worn, while flushing. Seek medical attention No occupational exposure limits have been established for immediately. Methyl Chlorosilane. However, it may pose a health risk. Always follow safe work practices. Skin Contact f Quickly remove contaminated clothing. Immediately wash contaminated skin with large amounts of soap and water. Seek medical attention. Inhalation f Remove the person from exposure. f Begin rescue breathing (using universal precautions) if breathing has stopped and CPR if heart action has stopped. f Transfer promptly to a medical facility. EMERGENCY NUMBERS Poison Control: 1-800-222-1222 CHEMTREC: 1-800-424-9300 NJDEP Hotline: 1-877-927-6337 National Response Center: 1-800-424-8802 METHYL CHLOROSILANE Page 2 of 6 Determining Your Exposure Reproductive Hazard f According to the information presently available to the New f Read the product manufacturer’s Material Safety Data Jersey Department of Health, Methyl Chlorosilane has not Sheet (MSDS) and the label to determine product been tested for its ability to affect reproduction. ingredients and important safety and health information about the product mixture. Other Effects f Methyl Chlorosilane can irritate the lungs. Repeated f For each individual hazardous ingredient, read the New exposure may cause bronchitis to develop with coughing, Jersey Department of Health Hazardous Substance Fact phlegm, and/or shortness of breath. Sheet, available on the RTK website (www.nj.gov/health/eoh/rtkweb) or in your facility’s RTK Central File or Hazard Communication Standard file. Medical f You have a right to this information under the New Jersey Medical Testing Worker and Community Right to Know Act, the Public If symptoms develop or overexposure is suspected, the Employees Occupational Safety and Health (PEOSH) Act following are recommended: if you are a public worker in New Jersey, and under the federal Occupational Safety and Health Act (OSHA) if you f Lung function tests are a private worker. Any evaluation should include a careful history of past and f The New Jersey Right to Know Act requires most present symptoms with an exam. Medical tests that look for employers to label chemicals in the workplace and damage already done are not a substitute for controlling requires public employers to provide their employees with exposure. information concerning chemical hazards and controls. The federal OSHA Hazard Communication Standard (29 Request copies of your medical testing. You have a legal right CFR 1910.1200) and the PEOSH Hazard Communication to this information under the OSHA Access to Employee Exposure and Medical Records Standard (29 CFR 1910.1020). Standard (N.J.A.C. 12:100-7) require employers to provide similar information and training to their employees. Mixed Exposures f Smoking can cause heart disease, lung cancer, This Fact Sheet is a summary of available information emphysema, and other respiratory problems. It may worsen regarding the health hazards that may result from exposure. respiratory conditions caused by chemical exposure. Even if Duration of exposure, concentration of the substance and other you have smoked for a long time, stopping now will reduce factors will affect your susceptibility to any of the potential your risk of developing health problems. effects described below. Health Hazard Information Acute Health Effects The following acute (short-term) health effects may occur immediately or shortly after exposure to Methyl Chlorosilane: f Contact can severely irritate and burn the skin and eyes. f Inhaling Methyl Chlorosilane can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath. Chronic Health Effects The following chronic (long-term) health effects can occur at some time after exposure to Methyl Chlorosilane and can last for months or years: Cancer Hazard f According to the information presently available to the New Jersey Department of Health, Methyl Chlorosilane has not been tested for its ability to cause cancer in animals. METHYL CHLOROSILANE Page 3 of 6 Workplace Controls and Practices f All protective clothing (suits, gloves, footwear, headgear) should be clean, available each day, and put on before work. Very toxic chemicals, or those that are reproductive hazards or sensitizers, require expert advice on control measures if a less toxic chemical cannot be substituted. Control measures Eye Protection include: (1) enclosing chemical processes for severely f Wear non-vented, impact resistant goggles when working irritating and corrosive chemicals, (2) using local exhaust with fumes, gases, or vapors. ventilation for chemicals that may be harmful with a single f Wear a face shield along with goggles when working with exposure, and (3) using general ventilation to control corrosive, highly irritating or toxic substances. exposures to skin and eye irritants. For further information on f Do not wear contact lenses when working with this workplace controls, consult the NIOSH document on Control substance. Banding at www.cdc.gov/niosh/topics/ctrlbanding/. Respiratory Protection The following work practices are also recommended: Improper use of respirators is dangerous. Respirators should only be used if the employer has implemented a written f Label process containers. program that takes into account workplace conditions, f Provide employees with hazard information and training. requirements for worker training, respirator fit testing, and f Monitor airborne chemical concentrations. medical exams, as described in the OSHA Respiratory f Use engineering controls if concentrations exceed recommended exposure levels. Protection Standard (29 CFR 1910.134). f Provide eye wash fountains and emergency showers. f Wash or shower if skin comes in contact with a hazardous f At any detectable concentration, use a NIOSH approved material. supplied-air respirator with a full facepiece operated in a f Always wash at the end of the workshift. pressure-demand or other positive-pressure mode. For f Change into clean clothing if clothing becomes increased protection use in combination with an auxiliary contaminated. self-contained breathing apparatus operated in a pressure- f Do not take contaminated clothing home. demand or other positive-pressure mode. f Get special training to wash contaminated clothing. f Do not eat, smoke, or drink in areas where chemicals are being handled, processed or stored. f Wash hands carefully before eating, smoking, drinking, Fire Hazards applying cosmetics or using the toilet. If employees are expected to fight fires, they must be trained and equipped as stated in the OSHA Fire Brigades Standard (29 CFR 1910.156). In addition, the following may be useful or required: f Methyl Chlorosilane is a FLAMMABLE and REACTIVE f Specific actions are required for this chemical by OSHA. GAS. Refer to the OSHA Compressed gases Standard (29 CFR f Extinguish fire only if flow can be stopped. 1910.101). f Use dry chemical, CO , alcohol-resistant foam or other foam f Before entering a confined space where Methyl 2 extinguishing agents, as water may not be effective in Chlorosilane may be present, check to make sure that an fighting fires. explosive concentration does not exist. f Water may form flammable and toxic gases. f POISONOUS GASES ARE PRODUCED IN FIRE, including Hydrogen Chloride and Phosgene. Personal Protective Equipment f CONTAINERS MAY EXPLODE IN FIRE. f Vapors may travel to a source of ignition and flash back. The OSHA Personal Protective Equipment Standard (29 CFR 1910.132) requires employers to determine the appropriate personal protective equipment for each hazard and to train employees on how and when to use protective equipment. The following recommendations are only guidelines and may not apply to every situation. Gloves and Clothing f Avoid skin contact with Methyl Chlorosilane. Wear personal protective equipment made from material which can not be permeated or degraded by this substance. Safety equipment suppliers and manufacturers can provide recommendations on the most protective glove and clothing material for your
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