LEAD, INORGANIC (as Pb)‡

Chemical Identification
Chemical Identification
CAS # 7439-92-1
Formula

Pb

Synonyms

lead metal; plumbum; other synonyms vary depending upon specific compounds

Physical Properties
Physical Properties
Physical description Soft silver-bluish white to gray metal.
Boiling point 3164°F Molecular weight 207.2
Freezing point/melting point 621.5°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 11.34 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.) 1591 1591 1591
Sampling group METALSSG-1 METALSSG-2 METALSSG-3
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0] Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0] Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (37 mm) [MAWP037A0]
Sampling time*

240-480 min

240-480 min

240-480 min

Sampling volume (TWA)*

480-960 L

480-960 L

480-960 L

Sampling flow rate (TWA)*

2 L/min

2 L/min

2 L/min

Sampling volume (STEL/Peak/C)*

30 L

Sampling flow rate (STEL/Peak/C)*

2 L/min

Analytical method instruments ICP-MS ICP ICP-MS
Method reference OSHA 5003 (fully validated) OSHA ID-125G (fully validated) OSHA ID-206 (fully validated)
Notes

The METALSSG-1 sampling group members are analyzed using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to target the expanded standards metals As, Cd, and Pb with high sensitivity (clean samples and smear tabs only).

If lead is the only analyte of interest, use the single analyte code 1591. If the filter is not overloaded, samples may be collected up to an 8-hour period.

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.

If the filter is not overloaded, samples may be collected up to an 8-hour period. 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 high sensitivity, request any or all of analytes listed in METALSSG-1 (0260, C141, & 1591).

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

For the entire suite of analytes listed in METALSSG-3, which may be found during soldering and brazing operations, request analyte code S131.

* 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

See sampling group information for media.

Bulk Method
Bulk Method

See sampling group information.

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

0.05 mg/m³ [0.03 mg/m³ Action Level]

REL-TWA

0.05 mg/m³

TLV-TWA

0.05 mg/m³ (Lead and inorganic compounds, as Pb) [1991]

PEL-TWA

0.05 mg/m³ (Lead, metallic and inorganic compounds), dust and fume, (as Pb)

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

OSHA considers "lead" to mean elemental lead, all inorganic lead compounds, and a class of organic lead compounds called lead soaps. This standard does not apply to other organic lead compounds. Note: Large nonferrous foundries (20+ employees) are required to achieve the PEL of 0.05 mg/m³ by means of engineering and work practice controls. Small nonferrous foundries (<20 employees) are required to achieve an 8-hour TWA of 0.075 mg/m³ by such controls. See 29 CFR 1910.1025.

Notes:

NIOSH considers "lead" to mean metallic lead, lead oxides, and lead salts (including organic salts such as lead soaps but excluding lead arsenate. Air concentrations should be maintained so that worker blood lead remains less than 0.06 mg Pb/100 g of whole blood. See Appendix C, Supplementary Exposure Limits.

Notes:

BEI®

Notes:

See also Section 5198.

Health factors:  See NIH-NLM PubChem. IDLH

100 mg/m³

Carcinogenic classifications: IARC-2A, TLV-A3, EPA-B2, NTP-R 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 - Lead

NIOSH: Pocket Guide to Chemical Hazards - Lead

Literature References

Last Updated Date : 03/02/2021