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Chemical Sampling Information: |
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| Phosphoric Acid |
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General Description
Synonyms: White phosphoric acid; Orthophosphoric acid; 85% Phosphoric acid; Metaphosphoric acid
OSHA IMIS Code Number: 2085
Chemical Abstracts Service (CAS) Registry Number: 7664-38-2
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: TB6300000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1805 154
NIOSH Pocket Guide to Chemical Hazards, Phosphoric 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 -- 1 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 1 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 1 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 mg/m3 TWA; 3 mg/m3 STEL
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 mg/m3 TWA; 3 mg/m3 STEL
Health Factors
NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 1,000 mg/m3
Potential symptoms: Irritation of eyes, skin, upper respiratory system; eye, skin burns; dermatitis; pulmonary edema (may be delayed after inhalation of acid mist); bronchitis; dental erosion; INGES ACUTE: Abdominal pain; burning sensation; shock or collapse.
Health Effects: Irritation-Eye, Nose, Throat, Skin---Marked (HE14); Lung edema (HE11); Dental erosion (HE3).
Affected organs: Eyes, skin, respiratory system
Note: Listed by the FDA as a Multiple Purpose GRAS (generally recognized as safe) Food Substance (21 CFR 182.1073).
Date Last Revised: 07/20/2004
Literature Basis:
- NIOSH Pocket Guide to Chemical Hazards: Phosphoric Acid.
- International Chemical Safety Cards (WHO/IPCS/ILO): Phosphoric acid.
- Amin, W.M., Al-Omoush, S.A. and Hattab, F.N.: Oral health status of workers exposed to acid fumes in phosphate and battery industries in Jordan. Int. Dent. J. 51(3): 169-174, 2001.
- Pohanish, R.P. (editor): Phosphoric Acid. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1864-1866.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
maximum volume: 960 Liters maximum flow rate: 2.0 L/min (TWA)
maximum volume: 30 Liters maximum flow rate: 2.0 L/min (STEL)
current analytical method: Ion Chromatography; IC
method reference: OSHA Analytical Method (OSHA ID-111)
method classification: Partially Validated
note: If the filter is not overloaded, samples may be collected up to an 8-hour period. Within 1 hour after sampling, transfer the filter to a clean screw cap vial. Phosphoric and sulfuric acid may be submitted on the same filter; otherwise, submit as a separate filter.
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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 (See note)
method reference: OSHA Analytical Method (OSHA ID-165SG)
method classification: Partially Validated
note: Phosphoric, Nitric, Hydrochloric, Hydrobromic and Sulfuric Acids may be submitted on the same tube. Sampling and analysis for this method are for combinations that include gaseous acids (Nitric, Hydrochloric, Hydrobromic) with Phosphoric and Sulfuric Acid mists.
Wipe sampling: Whatman smear tab; Solvent: Deionized water
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