---
type: threshold
id: tetramethyl-lead-as-pb
asset: workplace-exposure-limits
title: "Tetramethyl lead (as Pb) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
source_quote: "Tetramethyl lead (as Pb) | 75-74-1 | - | 0.075 | X |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Tetramethyl lead (as Pb)"
cas_number: "75-74-1"
pel_mgm3: "0.075"
verified: true
---
**Substance:** Tetramethyl lead (as Pb)

**CAS No.:** 75-74-1

**PEL (mg/m³):** 0.075

> Tetramethyl lead (as Pb) | 75-74-1 | - | 0.075 | X |

Source: <https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1>