MERCURY (ARYL & INORGANIC COMPOUNDS)†

Chemical Identification
Chemical Identification
CAS # 7439-97-6
Formula

Hg

Synonyms

Synonyms vary depending upon the specific inorganic or aryl mercury compound.

Physical Properties
Physical Properties
Physical description An odorless, silvery metallic liquid.
Boiling point 674°F Molecular weight 200.6
Freezing point/melting point -38°F Vapor pressure 0.0012 mmHg
Flash point Vapor density
Specific gravity 13.55 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.) M111
Sampling group
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*
 

5 min

Sampling volume (TWA)*
 

10 L

Sampling flow rate (TWA)*
 

2 L/min

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments CVAA
Method reference OSHA ID-145 (fully validated)
Notes

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 specific form, valence state, 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.

 

 

Special requirements
 

 

* 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
 

Available

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
 

0.05 mg/m³ (Hg vapor)

TLV-TWA
 

0.1 mg/m³ (aryl compounds), 0.025 mg/m³ (elemental and inorganic forms), [1991]

PEL-TWA
 

0.025 mg/m³

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

0.1 mg/m³

REL-C
 

0.1 mg/m³

TLV-C
 

 

PEL-C
 

0.1 mg/m³

Skin notation
 

N

Skin notation
 

Y

Skin notation
 

Y

Skin notation
 

Y

Notes:
 

See 29 CFR 1910.1000 Table Z-2

Notes:
 

 

Notes:
 

BEI® (elemental and inorganic forms)

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
 

10 mg/m³

Carcinogenic classifications: TLV-A4 (elemental and inorganic forms), IARC-2B Notes:
 

as Hg

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

--/0.25 ppm/0.5 ppm

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Mercury

NIOSH: Pocket Guide to Chemical Hazards - Mercury compounds [except (organo) alkyls] (as Hg)

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Mercury [7439-97-6], all forms except alkyl, as Hg. See annual publication for most recent information.

Last Updated Date : 01/04/2021