PMID- 23593960 OWN - NLM STAT- MEDLINE DCOM- 20141222 LR - 20181202 IS - 1520-5010 (Electronic) IS - 0893-228X (Linking) VI - 26 IP - 5 DP - 2013 May 20 TI - Is diacetyl a respiratory sensitizer? A reconsideration using QSAR, QMM, and competition experiments. PG - 631-3 LID - 10.1021/tx400097v [doi] AB - Concerns have been raised that diacetyl (DA) might be a respiratory sensitizer based on its LUMO energy similar to that of the respiratory allergen toluene-2,4-diisocyanate (TDI) and results of a local lymph node assay (LLNA) that reported an EC3 of 1.9%. To better understand the concerns, we performed a systematic literature review and experimental competition reactions between DA and TDI. The experimental evidence demonstrates that DA is at least 400-fold less reactive than TDI. The literature review finds evidence that the EC3 for DA is actually >11%. We conclude that DA is unlikely to have significant respiratory sensitization potential. FAU - Dworak, J J AU - Dworak JJ AD - Department of Chemistry, Wesleyan University , Hall-Atwater Laboratories, 52 Lawn Avenue, Middletown, Connecticut 06459-0180, United States. FAU - Roberts, D W AU - Roberts DW FAU - Calter, M A AU - Calter MA FAU - Fields, C A AU - Fields CA FAU - Borak, J AU - Borak J LA - eng PT - Journal Article PT - Review PT - Systematic Review DEP - 20130417 PL - United States TA - Chem Res Toxicol JT - Chemical research in toxicology JID - 8807448 RN - 0 (Allergens) RN - 17X7AFZ1GH (Toluene 2,4-Diisocyanate) RN - K324J5K4HM (Diacetyl) SB - IM MH - Allergens/*adverse effects/chemistry MH - Animals MH - Binding, Competitive/drug effects MH - Diacetyl/*adverse effects/chemistry MH - Humans MH - Local Lymph Node Assay MH - Lymph Nodes/*drug effects MH - *Quantitative Structure-Activity Relationship MH - *Quantum Theory MH - Respiratory Hypersensitivity/*chemically induced MH - Toluene 2,4-Diisocyanate/adverse effects/chemistry MH - Toxicity Tests EDAT- 2013/04/19 06:00 MHDA- 2014/12/23 06:00 CRDT- 2013/04/19 06:00 PHST- 2013/04/19 06:00 [entrez] PHST- 2013/04/19 06:00 [pubmed] PHST- 2014/12/23 06:00 [medline] AID - 10.1021/tx400097v [doi] PST - ppublish SO - Chem Res Toxicol. 2013 May 20;26(5):631-3. doi: 10.1021/tx400097v. Epub 2013 Apr 17.