Chemical Safety Program: PACs for Chemicals of Concern

PAC Database - Detailed Chemical Data

Chemical Identity

Chemical	CAS#	Health Code Numbers
Chloropicrin/Methyl chloride mixture	z-0007	14.01 4.01 11.01 14.02 4.08 4.05 7.01 8.00 7.00 11.00
Formula	Synonyms
[Unspecified]

Physical Properties

Mol Wt	State	MP (°C)	BP (°C)	VP (Hg)	VP (°C)	SG	LEL (ppm)
85	L

PAC Values

PAC Values (Original Units: ppm)
PAC-1	PAC-2	PAC-3
0.050	0.15	1.4

Converted PAC Values (mg/m3)
PAC-1	PAC-2	PAC-3
0.17	0.52	4.9

Technical Basis

A review of available sources identified AEGLs for a similar chemical, chloropicrin (CASRN: 76-06-2). The AEGLs were selected as the TEELs due to their priority among the emergency exposure limits (Section 1). To estimate a combined molecular weight, an equimolar mixture of chloropicrin (164.39 Da) and chloromethane (CASRN: 74-87-3, 50.49 Da) was assumed.
• TEEL-1 = AEGL-1 (chloropicrin, CASRN: 76-06-2)
• TEEL-2 = AEGL-2 (chloropicrin, CASRN: 76-06-2)
• TEEL-3 = AEGL-3 (chloropicrin, CASRN: 76-06-2)
This review generated TEEL ppm values that are consistent with Rev. 29A. The Rev. 29A and current TEEL bases are consistent (AEGLs); however, Rev. 29A incorrectly reports the same values in units of mg/m3. The current TEELs values reported in units of mg/m3 were converted and rounded from the reported ppm values, according to Section 3.4.7.2.

References

https://www.epa.gov/aegl/chloropicrin-results-aegl-program

Chemical information and description retrieved from: https://cameochemicals.noaa.gov/chemical/2908

Chloromethane information retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Chloromethane

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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.