PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Propanethiol; (n-Propylmercaptan) | 107-03-9 | 2402 |
14.01
4.01
11.01
15.02
4.08
4.05
7.01
8.00
7.00
11.00
|
|||||||||
| Formula | Synonyms | |||||||||||
| C3.H8.S | PROPYL MERCAPTAN, 1-MERCAPTOPROPANE, 1-PROPANETHIOL, 1-PROPYL MERCAPTAN, 1-PROPYLTHIOL, 3-MERCAPTOPROPANE, MERCAPTAN DE PROPYLE (DOT FRENCH), N-PROPANETHIOL, N-PROPYL MERCAPTAN, N-PROPYLTHIOL, PROPANE-1-THIOL, PROPIL MERCAPTANO (DOT SPANISH), PROPYLTHIOL | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 76.17 | L | 154.2 | 25 | 0.8411 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.045 | 0.50 | 320 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.14 | 1.6 | 1000 |
Technical Basis
A review of available sources identified the following: a REL-C exposure limit, and rat and mouse acute toxicity data (LC50, LD50) for various 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 toxicity data, a rat LC50, was selected as the TEEL-3 basis and was scaled to 60-minute equivalent using the ten Berge equation (Section 3.3.4). The REL-C was selected as the TEEL-2, and the TEEL-3 was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = REL-C (0.50 ppm)
• TEEL-3 = Rat LC50 (7300 ppm/4H)
This review generated TEEL ppm values that are consistent with Rev. 29A*. Minor difference in the reported TEEL-1 value in units of mg/m3 may be due to rounding.
• TEEL-1 = TEEL-2/11
• TEEL-2 = REL-C (0.50 ppm)
• TEEL-3 = Rat LC50 (7300 ppm/4H)
This review generated TEEL ppm values that are consistent with Rev. 29A*. Minor difference in the reported TEEL-1 value in units of mg/m3 may be due to rounding.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/1-Propanethiol
Rat LC50 (7300 ppm/4H): American Industrial Hygiene Association Journal., 19(171), 1958 [PMID:13559131]. Retrieved from: https://www.cdc.gov/niosh-rtecs/TZ6F63A0.html
REL-C, see Section 11.2.4 NIOSH Recommendations: https://pubchem.ncbi.nlm.nih.gov/compound/1-Propanethiol