Nitric Acid

CAS RN: 7697-37-2

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.
Vapor hazard index (VHI) is defined as concn of saturated vapor divided by TLV multiplied by 1000. The dimension of the vapor hazard index is temp dependent and is an indication of vapor hazard potential. Vapor hazard index 100% nitric acid= 28= good fume cupboard required at 20 deg C; 70% nitric acid= 2= extra precautions advisable in case of accidents at 20 deg C.
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 contacted the body with copious amounts of water or soap and water. If material leaking (not on fire) consider evacuation from downwind area based on amount of material spilled, location and weather conditions.
Environmental considerations: Air spill: Apply water spray or mist to knock down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment.
If material /is/ not involved in /a/ fire: Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock down vapors. Neutralize spilled material with crushed limestone, soda ash, or lime.
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.
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.
The worker should immediately wash the skin when it becomes contaminated.
Work clothing that becomes wet or significantly contaminated should be removed and replaced.
Find more information on this substance at: PubChem, PubMed