107-03-9
Product Name:
1-Propanethiol
Formula:
C3H8S
Synonyms:
n-Propylmercaptan;1-PP;1-Propanethiol;Mercaptan C3;Propyl mercaptan
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Propyl mercaptan appears as a colorless liquid with a strong, offensive odor. Moderately toxic. Flash point below 0 °F. Less dense than water and slightly soluble in water. Hence floats on water. Used as a chemical intermediate and a herbicide. |
|---|---|
| Color/Form | COLORLESS, MOBILE LIQUID |
| Odor | Offensive |
| Taste | BELOW 2-3 PPM SWEET ONION & CABBAGE-LIKE FLAVOR |
| Boiling Point | 153 °F at 760 mmHg (USCG, 1999) |
| Melting Point | -171 °F (USCG, 1999) |
| Flash Point | 5 °F (USCG, 1999) |
| Solubility | Slight (NIOSH, 2023) |
| Density | 0.841 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density | Relative vapor density (air = 1): 2.63 |
| Vapor Pressure | 155 mmHg at 77 °F (NIOSH, 2023) |
| LogP | log Kow = 1.81 |
| Henry's Law Constant | Henry's Law constant = 4.08X10-3 atm-cu m/mol at 25 °C |
| Decomposition | When heated to decomposition it emits highly toxic fumes of /sulfur oxides./ |
| Heat of Combustion | -15,990 Btu/lb= -8,890 cal/g= -372x10+5 J/kg |
| Heat of Vaporization | 179 Btu/lb= 99 cal/g= 4.16x10+5 J/kg |
| Surface Tension | 24.7 dynes/cm= 0.0247 N/m @ 20 °C |
| Ionization Potential | 9.195 eV |
| Odor Threshold | 0.00075 ppm |
| Refractive Index | Index of refraction: 1.4380 @ 20 °C/D |
| Kovats Retention Index | 600 587 624 600 603 594 600 601 600 605 596 |
| Other Experimental Properties | Forms binary azeotropic mixture with propyl alcohol (91.35%) & ternary azeotrope with water & propyl alcohol |
| Chemical Classes | Other Classes -> Thiols |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Exclamation Mark Irritant GHS07  Environment GHS09 |
| GHS Hazard Statements |
H225:Flammable liquids H302:Acute toxicity,oral H317:Sensitisation, Skin H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
COMPUTED DESCRIPTORS
| Molecular Weight | 76.16 g/mol |
|---|---|
| XLogP3 | 1.8 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 1 |
| Rotatable Bond Count | 1 |
| Exact Mass | 76.03467143 g/mol |
| Monoisotopic Mass | 76.03467143 g/mol |
| Topological Polar Surface Area | 1 Ų |
| Heavy Atom Count | 4 |
| Formal Charge | 0 |
| Complexity | 7.2 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Propyl mercaptan appears as a colorless liquid with a strong, offensive odor. Moderately toxic. Flash point below 0 °F. Less dense than water and slightly soluble in water. Hence floats on water. Used as a chemical intermediate and a herbicide.