1. OSHA Occupational Chemical Database
  2. MANGANESE, COMPOUNDS & FUME (as Mn)
Label abbreviations descriptions

MANGANESE, COMPOUNDS & FUME (as Mn)†

Chemical Identification
Chemical Identification
CAS # 7439-96-5
Formula

Mn
Synonyms

Manganese metal: Colloidal manganese; Manganese-55 Synonyms of other compounds vary depending upon the specific manganese compound.
Physical Properties
Physical Properties
Physical description A lustrous, brittle, silvery solid.
Boiling point 3564°F Molecular weight 54.9
Freezing point/melting point 2271°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 7.20 (metal) Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 1620 1620
Sampling group METALSSG-2
Sampler/Sampling media Tared low-ash 37 mm PVC filter, 5 microns [SLTC108] Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min
 

240-480 min
Sampling volume (TWA)*

960 L
 

480-960 L
Sampling flow rate (TWA)*
 

2 L/min 
 

2 L/min
Sampling volume (STEL/Peak/C)*
 

408-960 L
 
 

 
Sampling flow rate (STEL/Peak/C)*
 

2 L/min
 

 
Analytical method instruments Gravimetric ICP
Method reference OSHA PV2121 (partially validated) OSHA ID-125G (fully validated)
Notes
 

If the net weight of the sample yields a concentration below the PEL after considering the associated SAE , the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for  the applicable component and appropriate results will be reported.

Results are provided for the presence and amount or concentration of a specific element or elements. The stated identity of the actual sample contents (such as a specific form or compound) is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes. The physical form of a sample (dust, mist, or fume) is identified by the compliance officer using available documentation of materials and processes.
Special requirements
 

FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!

For the entire suite of analytes listed in METALSSG-2, request analyte code 2587.

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 
 

 
Bulk Method
Bulk Method
 
 

 
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 
 

 

 REL-TWA
 
 

1 mg/m³

 TLV-TWA
 
 

0.02 mg/m³ (respirable particulate matter), 0.1 mg/m³; (inhalable particulate matter) [2012]

 PEL-TWA
 
 

0.2 mg/m³
PEL-STEL
 
 

 

 REL-STEL
 
 

3 mg/m³

 TLV-STEL
 
 

 

 PEL-STEL
 
 

3 mg/m³
PEL-C
 
 

5 mg/m³

 REL-C
 
 

 

 TLV-C
 
 

 

 PEL-C
 
 

 
Skin notation
 
 

N

 Skin notation
 
 

N

 Skin notation
 
 

N

 Skin notation
 
 

N
Notes:
 
 

See 29 CFR 1910.1000 Table Z-1.

 Notes:
 
 

 

 Notes:
 
 

 

 Notes:
 
 

 
Health factors:  See NIH-NLM PubChem. IDLH
 
 

500 mg/m³
Carcinogenic classifications: EPA-D, TLV-A4 Notes:
 
 

 
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 
 

 
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Manganese

NIOSH: Pocket Guide to Chemical Hazards - Manganese compounds and fume (as Mn)

Literature References

 
 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Manganese [7439-96-5], elemental and inorganic compounds, as Mn. See annual publication for most recent information.
  • EPA: Hazard Summary - Manganese
  • ATSDR: Toxicological Profile for Manganese. 2012.
  • California Occupational Safety & Health Standards Board: Initial and Final Statement of Reasons. February 3, 2001.
  • EPA: Integrated Risk Information System for Manganese (CASRN 7439-96-5). 1988.
  • Hobbesland, A., Kjuus, H. and Thelle, D.S.: Mortality from nonmalignant respiratory diseases among male workers in Norwegian ferroalloy plants. Scand. J. Work Environ. Health 23(5): 342-350, 1997.
  • Laohaudomchok, W. et al. Neuropsychological effects of low-level manganese exposure in welders. Neurotoxicology. 32(2): 171-179, 2011.
  • NIOSH: Occupational Health Guideline for Manganese. 1978.
  • Racette, B.A., McGee-Minnich, L, Moerlein, S.M., Mink, J.W., Videen, T.O. and Perlmutter, J.S.: Welding-related parkinsonism: clinical features, treatment, and pathophysiology. Neurology 56(1): 8-13, 2001.
  • Roels, H., R. Lauwerys, J.P. Buchet et al.: Epidemiological survey among workers exposed to manganese: Effects on lung, central nervous system, and some biological indices. Am. J. Ind. Med. 11: 307-327, 1987.
  • Roels, H.A., P. Ghyselen, J.P. Buchet, E. Ceulemans, and R.R. Lauwerys: Assessment of the permissible exposure level to manganese in workers exposed to manganese dioxide dust. Br. J. Ind. Med. 49: 25-34, 1992.
  • Wergeland, E. and Iversen, B.G.: Deaths from pneumonia after welding. Scand. J. Work Environ. Health 27(5): 353, 2001.

Last Updated Date : 05/05/2023