Nitric Acid

CAS RN: 7697-37-2

Protective Equip. / Clothing

Personnel protection: Wear appropriate chemical protective gloves, boots and goggles. Wear positive pressure self-contained breathing apparatus when fighting fires involving this material. If contact with the material /is/ anticipated, wear appropriate chemical protective clothing.
Air mask; Rubber acid suit, hood, boots & gloves; Chemical goggles; Safety shower & eye bath.
Respiratory protection at 250 mg/cu m or less: A chemical cartridge respirator with a full facepiece providing protection against nitric acid. A gas mask with a chin-style or a front- or back-mounted organic vapor canister providing protection against nitric acid. Any supplied-air respirator with a full facepiece, or helmet or hood. Any self-contained breathing apparatus with a full facepiece. A Type-C supplied-air respirator operated in pressure-demand or other positive pressure or continuous-flow mode. Respiratory protection at greater than 250 mg/cu m: Self-contained breathing apparatus with a full facepiece operated in pressure-demand or other positive pressure mode. A combination respirator which includes a Type-C supplied-air respirator with a full facepiece operated in pressure-demand or other positive pressure or continuous-flow mode and an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode.
Vendor recommendations concerning the protective qualities of materials are as follows: Natural rubber, neoprene, nitrile, polyethylene, chlorinated polyethylene, polyvinyl chloride, viton and saranex received excellent or good ratings from less than three vendors (no fair or poor ratings), good and fair ratings, with good ratings predominating, from several vendors; Butyl, nitrile/poyvinyl chloride, polyunethome, polyvinyl alcohol received fair or poor ratings from less than three vendors, good and fair ratings, with fair ratings predominating, from several vendors. /Nitric acid, > 70%/
Vendor recommendations concerning the protective qualities of materials are as follows: Natural rubber, neoprene, nitrile and polyvinyl chloride received excellent of good ratings from three or more vendors; Butyl, polyethylene, chlorinated polyethylene, styrene, butadiene rubber and viton received excellent or good ratings from less than three vendors (no fair or poor ratings), good and fair ratings, with good ratings predominating, from several vendors. /Nitric acid, < 30%/
Vendor recommendations concerning the protective qualities of materials are as follows: Neoprene and and polyvinyl chloride received excellent and good ratings from three or more vendors; Natural rubber, nitrile, nitrile/polyvinyl chloride, polyethylene, polyurethane, Viton, and Saranex received excellent or good ratings from three vendors (no fair or poor ratings), good and fair ratings, with good ratings predominating, from several vendors. /Nitric acid 30-70%/
Wear appropriate personal protective clothing to prevent skin contact.
Wear appropriate eye protection to prevent eye contact.
Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection. /pH < 2.5/
Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.] /pH < 2.5/
Respirator Recommendations: Up to 25 ppm:
Assigned Protection Factor (APF) Respirator Recommendation
APF = 25 Any supplied-air respirator operated in a continuous-flow mode. Substance reported to cause eye irritation or damage; may require eye protection.
APF = 50 Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern. Only nonoxidizable sorbents allowed (not charcoal).
APF = 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern. Only nonoxidizable sorbents allowed (not charcoal).
APF = 50 Any self-contained breathing apparatus with a full facepiece.
APF = 50 Any supplied-air respirator with a full facepiece.
Respirator Recommendations: Emergency or planned entry into unknown concentrations or IDLH conditions:
Assigned Protection Factor (APF) Respirator Recommendation
APF = 10,000 Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode.
APF = 10,000 Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus.
Respirator Recommendations: Escape conditions:
Assigned Protection Factor (APF) Respirator Recommendation
APF = 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern. Only nonoxidizable sorbents allowed (not charcoal)./ Any appropriate escape-type, self-contained breathing apparatus.
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