Common Name: SODIUM HYDRIDE CAS Number: 7646-69-7 RTK Substance number: 1702 DOT Number: UN 1427 Date: March 1995 Revision: June 2001 ------------------------------------------------------------------------- ------------------------------------------------------------------------- HAZARD SUMMARY WORKPLACE EXPOSURE LIMITS * Sodium Hydride can affect you when breathed in. No occupational exposure limits have been established for * Eye contact can cause severe irritation and burns with Sodium Hydride. This does not mean that this substance is possible loss of vision. not harmful. Safe work practices should always be followed. * Sodium Hydride can severely irritate the skin. Severe burns can occur if the skin is moist. WAYS OF REDUCING EXPOSURE * Breathing Sodium Hydride can irritate the nose, throat * Where possible, enclose operations and use local exhaust and lungs causing coughing and/or shortness of breath. ventilation at the site of chemical release. If local exhaust * Sodium Hydride is a FLAMMABLE and REACTIVE ventilation or enclosure is not used, respirators should be chemical and a FIRE and EXPLOSION HAZARD. worn. * Wear protective work clothing. IDENTIFICATION * Wash thoroughly immediately after exposure to Sodium Sodium Hydride is a gray-white powder. It is used in Hydride and at the end of the workshift. making other chemicals. * Post hazard and warning information in the work area. In addition, as part of an ongoing education and training REASON FOR CITATION effort, communicate all information on the health and * Sodium Hydride is on the Hazardous Substance List safety hazards of Sodium Hydride to potentially exposed because it is cited by DOT and NFPA. workers. * This chemical is on the Special Health Hazard Substance List because it is FLAMMABLE and REACTIVE. * Definitions are provided on page 5. HOW TO DETERMINE IF YOU ARE BEING EXPOSED The New Jersey Right to Know Act requires most employers to label chemicals in the workplace and requires public employers to provide their employees with information and training concerning chemical hazards and controls. The federal OSHA Hazard Communication Standard, 1910.1200, requires private employers to provide similar training and information to their employees. * Exposure to hazardous substances should be routinely evaluated. This may include collecting personal and area air samples. You can obtain copies of sampling results from your employer. You have a legal right to this information under OSHA 1910.1020. * If you think you are experiencing any work-related health problems, see a doctor trained to recognize occupational diseases. Take this Fact Sheet with you. SODIUM HYDRIDE page 2 of 6 This Fact Sheet is a summary source of information of all Mixed Exposures potential and most severe health hazards that may result from * Because smoking can cause heart disease, as well as lung exposure. Duration of exposure, concentration of the substance cancer, emphysema, and other respiratory problems, it may and other factors will affect your susceptibility to any of the worsen respiratory conditions caused by chemical exposure. potential effects described below. Even if you have smoked for a long time, stopping now will --------------------------------------------------------------------------- reduce your risk of developing health problems. HEALTH HAZARD INFORMATION WORKPLACE CONTROLS AND PRACTICES Acute Health Effects Unless a less toxic chemical can be substituted for a hazardous The following acute (short-term) health effects may occur substance, ENGINEERING CONTROLS are the most immediately or shortly after exposure to Sodium Hydride: effective way of reducing exposure. The best protection is to enclose operations and/or provide local exhaust ventilation at * Eye contact can cause severe irritation and burns with the site of chemical release. Isolating operations can also possible loss of vision. reduce exposure. Using respirators or protective equipment is * Sodium Hydride can severely irritate the skin causing a less effective than the controls mentioned above, but is rash or burning feeling on contact. Severe burns can occur sometimes necessary. if the skin is moist (water, sweating, etc.). * Breathing Sodium Hydride can irritate the nose, throat and In evaluating the controls present in your workplace, consider: lungs causing coughing and/or shortness of breath. (1) how hazardous the substance is, (2) how much of the substance is released into the workplace and (3) whether Chronic Health Effects harmful skin or eye contact could occur. Special controls The following chronic (long-term) health effects can occur at should be in place for highly toxic chemicals or when some time after exposure to Sodium Hydride and can last for significant skin, eye, or breathing exposures are possible. months or years: In addition, the following controls are recommended: Cancer Hazard * According to the information presently available to the New * Where possible, automatically transfer Sodium Hydride Jersey Department of Health and Senior Services, Sodium from drums or other storage containers to process Hydride has not been tested for its ability to cause cancer containers. in animals. * Before entering a confined space where Sodium Hydride may be present, check to make sure that an explosive Reproductive Hazard concentration does not exist. * According to the information presently available to the New Jersey Department of Health and Senior Services, Sodium Good WORK PRACTICES can help to reduce hazardous Hydride has not been tested for its ability to affect exposures. The following work practices are recommended: reproduction. * Workers whose clothing has been contaminated by Sodium Other Long-Term Effects Hydride should change into clean clothing promptly. * Sodium Hydride can irritate the lungs. Repeated exposure * Do not take contaminated work clothes home. Family may cause bronchitis to develop with cough, phlegm, members could be exposed. and/or shortness of breath. * Contaminated work clothes should be laundered by individuals who have been informed of the hazards of exposure to Sodium Hydride. MEDICAL * Eye wash fountains should be provided in the immediate work area for emergency use. Medical Testing * If there is the possibility of skin exposure, emergency If symptoms develop or overexposure is suspected, the shower facilities should be provided. following are recommended: * On skin contact with Sodium Hydride, immediately wash or shower to remove the chemical. At the end of the * Lung function tests. workshift, wash any areas of the body that may have contacted Sodium Hydride, whether or not known skin Any evaluation should include a careful history of past and contact has occurred. present symptoms with an exam. Medical tests that look for * Do not eat, smoke, or drink where Sodium Hydride is damage already done are not a substitute for controlling handled, processed, or stored, since the chemical can be exposure. swallowed. Wash hands carefully before eating, drinking, smoking, or using the toilet. Request copies of your medical testing. You have a legal right * Use a vacuum to reduce dust during clean-up. DO NOT to this information under OSHA 1910.1020. DRY SWEEP. SODIUM HYDRIDE page 3 of 6 PERSONAL PROTECTIVE EQUIPMENT * Be sure to consider all potential exposures in your workplace. You may need a combination of filters, WORKPLACE CONTROLS ARE BETTER THAN prefilters or cartridges to protect against different forms of a PERSONAL PROTECTIVE EQUIPMENT. However, for chemical (such as vapor and mist) or against a mixture of some jobs (such as outside work, confined space entry, jobs chemicals. done only once in a while, or jobs done while workplace * Where the potential for high exposure exists, use a controls are being installed), personal protective equipment MSHA/NIOSH approved supplied-air respirator with a full may be appropriate. facepiece operated in a pressure-demand or other positive- pressure mode. For increased protection use in combination OSHA 1910.132 requires employers to determine the with an auxiliary self-contained breathing apparatus appropriate personal protective equipment for each hazard and operated in a pressure-demand or other positive-pressure to train employees on how and when to use protective mode. equipment. HANDLING AND STORAGE The following recommendations are only guidelines and may not apply to every situation. * Prior to working with Sodium Hydride you should be trained on its proper handling and storage. Clothing * Sodium Hydride reacts with WATER to form toxic * Avoid skin contact with Sodium Hydride. Wear protective Sodium Hydroxide and flammable and explosive Hydrogen gloves and clothing. Safety equipment suppliers/ gas. manufacturers can provide recommendations on the most * Sodium Hydride is not compatible with OXIDIZING protective glove/clothing material for your operation. AGENTS (such as PERCHLORATES, PEROXIDES, * All protective clothing (suits, gloves, footwear, headgear) PERMANGANATES, CHLORATES, NITRATES, should be clean, available each day, and put on before CHLORINE, BROMINE and FLUORINE); STRONG work. ACIDS (such as HYDROCHLORIC, SULFURIC and NITRIC); ORGANIC COMPOUNDS; SODIUM Eye Protection HYDROXIDE; HALOGENS; ACETYLENE; SULFUR; * Wear impact resistant eye protection with side shields or DIMETHYL FORMAMIDE; ALCOHOLS; and CARBON goggles. DIOXIDE. * Wear a face shield along with goggles when working with * Store in tightly closed containers in a cool, dry, well- corrosive, highly irritating or toxic substances. ventilated