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Chemical Sampling Information |
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| Nitric Acid |
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General Description
Synonyms: Aqua fortis; White fuming nitric acid (WFNA); Red fuming nitric acid (RFNA); Hydrogen nitrate
OSHA IMIS Code Number: 1860
Chemical Abstracts Service (CAS) Registry Number: 7697-37-2
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: QU5775000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2031 157 (other than red fuming); 2032 157 (fuming)
NIOSH Pocket Guide to Chemical Hazards, Nitric Acid: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 2 ppm, 5 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 2 ppm, 5 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 2 ppm, 5 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 2 ppm, 5 mg/m3 TWA; 4 ppm, 10 mg/m3 STEL
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 2 ppm, 5 mg/m3 TWA; 4 ppm, 10 mg/m3 STEL
Health Factors
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 25 ppm
Potential symptoms: Eye, mucous membrane, skin irritation; eye redness, pain, severe burns; skin burns, pain, yellow discoloration; cough, dyspnea, delayed pulmonary edema, pneumonitis, bronchitis; unconsciousness; dental erosion; INGES ACUTE: abdominal pain, burning sensation, shock.
Health Effects: Acute lung damage (HE4); Irritation-Eye, Nose, Throat, Skin---Marked (HE14)
Affected organs: Eyes, respiratory system, skin, teeth
Note:
One death from occupational inhalation of nitric acid was reported to a U.S. poison control center in 2001.
Date Last Revised: 07/10/2003
Literature Basis:
- (symptoms, IDLH)
International Chemical Safety Cards (WHO/IPCS/ILO): Nitric acid.
- (fatality)
Litovitz, T.L., et al.: 2001 Annual Report of the American Association of Poison Control Centers Toxic Exposure Surveillance System. Am. J. Emerg. Med. 20(5): 391-452, 2002.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: Treated Silica Gel Tube (Supelco, ORBO-53; SKC, 226-10-03 or equivalent)
maximum volume: 96 Liters maximum flow rate: 0.2 L/min (TWA)
maximum volume: 7.5 Liters maximum flow rate: 0.5 L/min (STEL)
current analytical method: Ion Chromatography; IC
method reference: OSHA Analytical Methods (OSHA ID-165SG)
method classification: Partially Validated
note: Phosphoric, Nitric, Sulfuric, and Hydrobromic(HBr) Acids may be submitted on the same sample (TWA only). For STEL samples, submit as a separate sample. Make sure that glass fiber filter plug is firmly in contact with silica gel before sampling and before sealing tube for shipment. Interferences: Particulate acids, salts of an anion.
On-Site Sampling Techniques/Methods:
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device: Detector Tube
manufacturer: Dräger
model/type: Nitric Acid 1/a, order no. 67 28311
sampling information: 10 or 20 strokes
upper measurement limit: 50 ppm
detection limit: approx. 1 ppm
overall uncertainty: 16%
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Gastec
model/type: 15L
sampling information: 0.5 or 10 strokes
upper measurement limit: 40 ppm
detection limit: 0.05 ppm
overall uncertainty: 25% for 1 to 5 ppm, 16% for 5 to 20 ppm
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Gastec
model/type: 80
sampling information: 2 strokes
upper measurement limit: 200 ppm
detection limit: 2.5 ppm
overall uncertainty: unknown
method reference: on-site air secondary (manufacturer)
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device: Detector Tube
manufacturer: Matheson-Kitagawa
model/type: 8014-233S
sampling information: follow manufacturer’s instructions
upper measurement limit: 20 ppm
detection limit: approx. 1 ppm
overall uncertainty: unknown
method reference: on-site air secondary (manufacturer)
Wipe sampling: Media for Liquid Solutions: Whatman smear tab; Solvent: Deionized Water
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