PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Methacryloyl chloride 920-46-7
14.01
14.02
4.01
11.01
Formula Synonyms
C4H5ClO METHACRYLOYL CHLORIDE, 2-METHYL-2-PROPENOYL CHLORIDE, 2-METHYLPROPENOIC ACID CHLORIDE, 2-PROPENOYL CHLORIDE, 2-METHYL-, ALPHA-METHYLACRYLOYL CHLORIDE, METHACRYL CHLORIDE, METHACRYLIC ACID CHLORIDE, METHACRYLIC CHLORIDE, METHACRYLYL CHLORIDE, METHYLACRYLOYL CHLORIDE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
104.54 L -60 96 40 25
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.055 0.60 2.6
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.013 0.14 0.61
Technical Basis
A review of available sources identified mouse and rat LC50 acute toxicity data and LOC. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. Inhalation exposures were scaled to 60-minute equivalents using the ten Berge equation (Section 3.3.4). The most preferred species inhalation toxicity, a rat LC50, was selected as the TEEL-3 basis. The LOC was selected as the TEEL-2. TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = LOC (0.0006 g/m3)
• TEEL-3 = Rat LC50 (60 mg/m3/4H)
This review generated TEEL values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Methacryloyl-chloride
Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure, Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982, (80), 1982. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Methacryloyl-chloride
LOC; Appendix C, pg. C-6, https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.