919-86-8
Product Name:
DEMETON-S-METHYL
Formula:
C6H15O3PS2
Synonyms:
S-[2-(Ethylthio)ethyl] O,O-dimethyl phosphorothioate;Methyldemetone;S-(2-Ethylthioethyl) O,O-dimethyl phosphorothioate
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Demeton-s-methyl is a pale yellow oil. Used as an insecticide. Not registered as a pesticide in the U.S. (EPA, 1998) |
|---|---|
| Color/Form | Oily colorless to pale yellow liquid |
| Odor | Unpleasant odor |
| Boiling Point | 192 °F at 0.15 mmHg (EPA, 1998) |
| Solubility | Sol in organic solvents |
| Density | 1.207 at 68 °F (EPA, 1998) - Denser than water; will sink |
| Vapor Density | Relative vapor density (air = 1): 7.9 |
| Vapor Pressure | 0.00036 mmHg at 68 °F (EPA, 1998) |
| LogP | log Kow = 1.02 |
| Stability/Shelf Life | Demeton-S-methyl is less stable than demeton. 50% hydrolysis at 70 °C requires 1.25 hr at pH 9 and 4.9 hr at pH 3. |
| Decomposition | When heated to decomposition it emits toxic fumes of /phosphorous and sulfur oxides/. |
| Odor Threshold | 1.0X10-2 mg/L (liqiuid) (detection in water, purity not specified) |
| Refractive Index | Index of refraction: 1.5063 at 20 °C/D |
| Collision Cross Section | 150.48 Ų [M+Na]+ |
| Kovats Retention Index | 1628 1579 1596 1628 1628 |
| Other Experimental Properties | A light yellow liquid; hydrolyzed by alkali /Commercial product - methyl demeton/ |
| Chemical Classes | Pesticides -> Organophosphate Insecticides |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Skull and Crossbones Acute Toxicity GHS06  Exclamation Mark Irritant GHS07  Environment GHS09 |
| GHS Hazard Statements |
H225:Flammable liquids H319:Serious eye damage/eye irritation H411:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P391:Collect spillage. Hazardous to the aquatic environment P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P501:Dispose of contents/container to..… |
COMPUTED DESCRIPTORS
| Molecular Weight | 230.3 g/mol |
|---|---|
| XLogP3 | 1 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 7 |
| Exact Mass | 230.02002368 g/mol |
| Monoisotopic Mass | 230.02002368 g/mol |
| Topological Polar Surface Area | 86.1 Ų |
| Heavy Atom Count | 12 |
| Formal Charge | 0 |
| Complexity | 146 |
| 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
Demeton-s-methyl is a pale yellow oil. Used as an insecticide. Not registered as a pesticide in the U.S. (EPA, 1998)