Boron Trifluoride

CAS RN:7637-07-2

Other Preventive Measures

SRP: The scientific literature for the use of contact lenses by industrial workers is inconsistent. The benefits or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Gas masks approved for acid gases or those with an independent oxygen or air supply should be available in convenient locations ... do not use equipment which has been used for boron trifluoride with other gases, particularity oxygen, since the gas may have oil vapors which coat out on the equipment, causing fires when combined with oxygen under pressure. /To prevent/ the possibility of suckback into the cylinder, traps or check valves should be used as a safe-guard.
Fountains and safety showers must be provided in areas of potential boron trifluoride exposure, since skin and eye effects can be minimized with immediate, thorough washing of exposed surfaces.
Food preparation, dispensing (including vending machines), and eating should be prohibited in boron trifluoride work areas. Smoking and uncovered smoking materials should be prohibited in boron trifluoride work areas because of the possibility of adsorption of the compound onto smoking materials.
SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.
In contact with atmosphere, the gas forms dense white fumes. Even after cylinder valve has been tightly closed, the fumes will linger around the outlet for as long as 0.5 hr. This frequently causes the user to believe that the valve itself is leaking. In addn, the gas is inherently difficult to control through valves and piping, and even the best equipment is apt to show slight signs of leaking, which will make an abundance of fumes. It is essential when using boron trifluoride to have a trap in the delivery tube to prevent impurities from being sucked back into the cylinder. ... Every boron trifluoride valve is equipped with a device consisting of a platinum disc in back of a plug containing a metal that will melt at approx 70 deg C. Frequently, a similar safety device is inserted in the base of the cylinder.
SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.
In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water. Fire fighters should wear complete protective clothing including self-contained breathing apparatus.
If material not involved in fire: Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Do not use water on material itself.
Evacuation: If material leaking (not on fire) consider evacuation from downwind area based on amount of material spilled, location and weather conditions.
Personnel protection: Avoid breathing vapors. Keep upwind. Avoid bodily contact with the material. Do not handle broken packages unless wearing appropriate personal protective equipment. Wash away any material which may have contracted the body with copious amounts of water or soap and water.
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