TETRAMETHYL LEAD (as Pb)†

Chemical Identification
CAS # 75-74-1
Formula

C₄H₁₂Pb

Synonyms

lead tetramethyl; tetramethylplumbane; TML

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
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
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
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 Industry PELs are 0.15 mg/m³. See 29 CFR 1926.55 Table 1 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:

Last Updated Date : 06/03/2022