333-41-5
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Liquid; light to dark brown. Sinks in water. Commercial solutions can contain ethanol/xylene/acetone with a flash point in the range 82-105 °F. |
|---|---|
| Color/Form | Colorless oil |
| Odor | Faint ester-like odor |
| Boiling Point | Decomposes >248 °F (NTP, 1992) |
| Melting Point | < 25 °C |
| Flash Point | 82 to 105 °F (commercial solutions) (NTP, 1992) |
| Solubility | less than 1 mg/mL at 75 °F (NTP, 1992) |
| Density | 1.117 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Pressure | 0.0001 mmHg (NIOSH, 2023) |
| LogP | log Kow = 3.81 |
| Henry's Law Constant | Henry's Law constant = 1.17X10-7 atm-cu m/mol at 23 °C |
| Stability/Shelf Life | More stable in alkaline formulations, then when at neutral or acid pH. |
| Autoignition Temperature | > 400 °C. /Diazinon 50W/ |
| Decomposition | When heated to decomposition it emits very toxic fumes of /phosphorus oxides, sulfur oxides, and nitrogen oxides/. |
| Refractive Index | Index of refraction: 1.4978-1.4981 at 20 °C/D |
| Dissociation Constants | pKa = 2.6 |
| Collision Cross Section | 173.38 Ų [M+H]+ |
| Kovats Retention Index | 1766 1743 1743 1746 1756 1774 1745 1767 1772 1776 1776 1772 1769 1760 1779.1 1774.1 1768 1760.1 1778.2 1759.1 1762.3 1785.1 1761 1770.1 1789.2 1775 1780 1781.8 1758 1759.4 1773.5 1769.7 1772.9 1766 |
| Other Experimental Properties | Hydrolysis of diazinon and diazoxon conform to pseudo first-order rate in pH range 3.1-10.9. |
| Chemical Classes | Pesticides -> Organophosphate Insecticides |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06  Environment GHS09 |
| GHS Hazard Statements |
H301:Acute toxicity,oral H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P273:Avoid release to the environment. P391:Collect spillage. Hazardous to the aquatic environment P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P405:Store locked up. |
COMPUTED DESCRIPTORS
| Molecular Weight | 304.35 g/mol |
|---|---|
| XLogP3 | 3.8 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 6 |
| Rotatable Bond Count | 7 |
| Exact Mass | 304.10105071 g/mol |
| Monoisotopic Mass | 304.10105071 g/mol |
| Topological Polar Surface Area | 85.6 Ų |
| Heavy Atom Count | 19 |
| Formal Charge | 0 |
| Complexity | 307 |
| 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
Diazinon is the common name of an organophosphorus pesticide used to control pest insects in soil, on ornamental plants, and on fruit and vegetable field crops. It was formerly used as the active ingredient in household and garden products used to control pests such as flies, fleas, and cockroaches. Diazinon is a synthetic chemical, it does not occur naturally in the environment. Pure diazinon is colorless and practically odorless oil. Preparations used in agriculture and by exterminators contain 85-90% diazinon and appear as a pale to dark-brown liquid. Diazinon preparations sold in the past for home and garden use contained 1-5% diazinon in a liquid or as solid granules. Most diazinon used is in liquid form, but it is possible to be exposed to the solid form. Diazinon does not dissolve easily in water and does not burn easily.