Chemical Safety Program: PACs for Chemicals of Concern

PAC Database - Detailed Chemical Data

Chemical Identity

Chemical	CAS#	Health Code Numbers
Carbamic acid, methyl-, O-(((2,4-dimethyl-1,3-dithiolan-2-yl)methylene)amino)-; (Tirpate)	26419-73-8	4.00 3.00
Formula	Synonyms
C8.H14.N2.O2.S2	CARBAMIC ACID, METHYL-, O-(((2,4-DIMETHYL-1, 3-DITHIOLAN-2-Y, 1,3-DITHIOLANE- 2-CARBOXALDEHYDE, 2,4-DIMETHYL-, O-(METHYLCA, 1,3-DITHIOLANE-2- CARBOXALDEHYDE, 2,4-DIMETHYL-, O-((METHYLA, 1,3-DITHIOLANE-2-CARBOXALDEHYDE, 2,4-DIMETHYL-, O-(METHYLCAR, 2,4-DIMETHYL- 1,3-DITHIOLANE-2-CARBOXALDEHYDE O-(METHYLCARBA, 2,4-DIMETHYL- 2-FORMYL-1,3-DITHIOLANE OXIME METHYLCARBAMATE, CARBAMIC ACID, METHYL-,, CARBAMIC ACID, METHYL-, O-[[(2,4-DIMETHYL-1,3-DITHIOLAN-2-YL, ENT 27696, MBR 6168, TIRPATE

Physical Properties

Mol Wt	State	MP (°C)	BP (°C)	VP (Hg)	VP (°C)	SG	LEL (ppm)
234.36	S

PAC Values

PAC Values (Original Units: mg/m3)
PAC-1	PAC-2	PAC-3
0.0030	0.033	0.20

Converted PAC Values (ppm)
PAC-1	PAC-2	PAC-3
0.00031	0.0034	0.021

Technical Basis

A review of available sources identified acute toxicity data (LD50) for several species and routes. 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. The most preferred route and species toxicity data, a rat oral LD50, was selected as the TEEL-3. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (1 mg/kg)
This review generated TEEL values that are consistent Rev. 29A

References

World Review of Pest Control., 9(119), 1970. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/9555555

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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.