Toluene-2,4-diisocyanate — CAS 584-84-9 — workplace exposure limit

What is the niosh rel, as stated for Toluene-2,4-diisocyanate — CAS 584-84-9 — workplace exposure limit?

For Toluene-2,4-diisocyanate, niosh rel, as stated is Ca See Appendix A; cas no. is 584-84-9, verified against its source on 2026-09-08.

NIOSH REL Ca See Appendix A

— cdc.gov, retrieved 2026-09-08

Substance: Toluene-2,4-diisocyanate verified
CAS No.: 584-84-9 verified
NIOSH REL, as stated: Ca See Appendix A verified
PEL (ppm): (C)0.02 per osha.gov
PEL (mg/m³): (C)0.14 per osha.gov
Ceiling: 0.02 ppm per dir.ca.gov
Ceiling notation: a ceiling value in addition to the TWA values per dir.ca.gov
STEL (ppm): 0.02 per dir.ca.gov
STEL (mg/m³): 0.15 per dir.ca.gov

Verified2026-09-08

Review by2027-08-05

This source states these in separate places, so each value is shown with the passage that states it.

Substance

CDC - NIOSH Pocket Guide to Chemical Hazards - Toluene-2,4-diisocyanate

CAS No.

CAS No. 584-84-9

— all from cdc.gov, retrieved 2026-09-08

Toluene-2,4-diisocyanate (TDI) | 584-84-9 | (C)0.02 | (C)0.14 | - |

— osha.gov, retrieved 2026-08-05

584849 | | Toluene-2,4-diisocyanate; TDI | 0.005 | 0.04 | 0.02 ppm | 0.02 | 0.15

— dir.ca.gov, retrieved 2026-09-28

584849 | | TDI; see Toluene-2,4-diisocyanate

— dir.ca.gov, retrieved 2026-08-05

cdc.govhttps://www.cdc.gov/niosh/npg/npgd0621.html
osha.govhttps://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
dir.ca.govhttps://www.dir.ca.gov/title8/5155.html

Last verified against source: 2026-09-08. Due for re-check by 2027-08-05. This page as Markdown · OKF bundle · full dataset as JSON.