CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Sulfur tetrafluoride is a colorless gas with a distinct sulfur odor. It is highly toxic by inhalation and a strong irritant to skin, eyes and mucous membranes. It reacts vigorously with water and acids to yield toxic fluoride and sulfur oxide fumes and an acidic solution. Sulfur tetrafluoride is heavier than air. Under prolonged exposure to fire or intense heat the containers may violently rupture or rocket. It is used as a fluoridizing agent and as an oil repellent. |
|---|---|
| Color/Form | Colorless gas |
| Odor | Irritating odor that resembles sulfur dioxide |
| Boiling Point | -40 °F at 760 mmHg (EPA, 1998) |
| Melting Point | -191 °F (EPA, 1998) |
| Solubility | Reacts with water (NIOSH, 2023) |
| Density | 1.95 at -108 °F (EPA, 1998) - Denser than water; will sink |
| Vapor Density | 3.78 (NIOSH, 2023) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 10.5 atm at 70 °F (NIOSH, 2023) |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Decomposition | When heated it emits very toxic fumes of /hydrogen fluoride and sulfur oxides/. |
| Corrosivity | Attacks glass, but not quartz or mercury |
| Heat of Vaporization | 26.4 kJ/mol |
| Ionization Potential | 12.63 eV |
| Odor Threshold | Low threshold= 0.033 mg/cu m High threshold= 0.13 mg/cu m. Irritating concn= 4.17 mg/cu m. /Hydrofluoric acid/ |
| Other Experimental Properties | Decomposed by concentrated sulfuric acid. Thermostable at 600 °C |
| Chemical Classes | Toxic Gases & Vapors -> Corrosive Gases |
COMPUTED DESCRIPTORS
| Molecular Weight | 108.06 g/mol |
|---|---|
| XLogP3 | 3.1 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 0 |
| Exact Mass | 107.96568382 g/mol |
| Monoisotopic Mass | 107.96568382 g/mol |
| Topological Polar Surface Area | 1 Ų |
| Heavy Atom Count | 5 |
| Formal Charge | 0 |
| Complexity | 19.1 |
| 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
Sulfur tetrafluoride is a colorless gas with a distinct sulfur odor. It is highly toxic by inhalation and a strong irritant to skin, eyes and mucous membranes. It reacts vigorously with water and acids to yield toxic fluoride and sulfur oxide fumes and an acidic solution. Sulfur tetrafluoride is heavier than air. Under prolonged exposure to fire or intense heat the containers may violently rupture or rocket. It is used as a fluoridizing agent and as an oil repellent.