Powered by GoogleTranslate

Phosphoric Acid

General Description

Synonyms:  White phosphoric acid; Orthophosphoric acid; Metaphosphoric acid

OSHA IMIS code: 2085

CAS number(s): 7664-38-2

Exposure Limits and Health Effects (Updated September 6, 2012)

Standard Set By Exposure Limit Health Effect Codes -- Health Effects and Target Organs
OSHA PEL - General Industry
See 29 CFR 1910.1000 Table Z-1
1 mg/m3 TWA HE14 -- throat irritation
OSHA PEL - Construction Industry
See 29 CFR 1926.55 Appendix A
1 mg/m3 TWA HE14 -- throat irritation
OSHA PEL - Shipyard Employment
See 29 CFR 1915.1000 Table Z - Shipyards
1 mg/m3 TWA HE14 -- throat irritation
NIOSH REL 1 mg/m3 TWA
3 mg/m3 STEL
HE4 -- eye and skin burns
HE14 -- eye, nose, skin, and throat irritation
ACGIH TLV® (1992) 1 mg/m3 TWA
3 mg/m3 STEL
HE14 -- eye, skin, and respiratory irritation
CAL/OSHA PELs 1 mg/m3 TWA
3 mg/m3 STEL
HE14 -- eye, skin, and respiratory irritation

Carcinogenic classification:

  • NTP: Not listed
  • IARC: Not listed
  • EPA: Not listed

EPA Inhalation Reference Concentration (RfC):1x10-2mg/m3

ATSDR Inhalation Minimal Risk Levels (MRLs): Not established

NIOSH IDLH concentration: 1,000 mg/m3

Notes on other potential health effects and hazards:

  1. Exposure to phosphoric acid fumes in a battery factory was found to be significantly associated with dental erosion and deteriorated dental health in the workers (Amin et al. 2001).

Partial reference list:

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Phosphoric Acid. 2016.
  • 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.
  • NIOSH: Occupational Health Guideline for Phosphoric Acid. September 1978.
  • NIOSH/CEC/IPCS: International Chemical Safety CardsPhosphoric Acid. March 10, 2000.

Chemical Sampling Information

By Name

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

By CAS Number

** All Trademarks are the property of their respective owners.

Back to Top

Thank You for Visiting Our Website

You are exiting the Department of Labor's Web server.

The Department of Labor does not endorse, takes no responsibility for, and exercises no control over the linked organization or its views, or contents, nor does it vouch for the accuracy or accessibility of the information contained on the destination server. The Department of Labor also cannot authorize the use of copyrighted materials contained in linked Web sites. Users must request such authorization from the sponsor of the linked Web site. Thank you for visiting our site. Please click the button below to continue.

Close