TETRAMETHYL LEAD (as Pb)†

Chemical Identification
Chemical Identification
CAS # 75-74-1
Formula

C₄H₁₂Pb

Synonyms

lead tetramethyl; tetramethylplumbane; TML

Physical Properties
Physical Properties
Physical description Colorless liquid (unless dyed red, orange, or blue) with a fruity odor.
Boiling point 230°F at 10 mmHg (decomposes above 212°F) Molecular weight 267.33
Freezing point/melting point -17.5°F Vapor pressure 23 mmHg
Flash point 100°F Vapor density 6.5
Specific gravity 1.995 Ionization potential 8.50 eV
Lower explosive limit (LEL) 1.8% Upper explosive limit (UEL)
NFPA health rating 2 NFPA fire rating 3
NFPA reactivity rating 3 NFPA special instruction W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2370
Sampling group
Sampler/Sampling media XAD-2 tube (400/200 mg) [SKC 226-30-06]
Sampling time*
Sampling volume (TWA)*

15-100 L

Sampling flow rate (TWA)*

0.01 - 0.2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-PID
Method reference NIOSH 2534 (fully validated)
Notes
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
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

0.075 mg/m³

REL-TWA

0.075 mg/m³

TLV-TWA

0.15 mg/m³ [1992]

PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C

0.075 mg/m³ [1992]

PEL-C
Skin notation

Y

Skin notation

Y

Skin notation

Y

Skin notation

Y

Notes:

See 29 CFR 1910.1000 Table Z-1. OSHA Construction and Maritime Industries PEL is 0.15 mg/m³. See 29 CFR 1926.55 Appendix A and 29 CFR 1915.1000 Table Z-Shipyards.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

40 mg/m³

Carcinogenic classifications: IARC-3 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 - Tetramethyllead

NIOSH: Pocket Guide to Chemical Hazards - Tetramethyl lead (as Pb)

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Tetramethyl lead [75-74-1], as Pb. See annual publication for most recent information.

Last Updated Date : 01/13/2021