950-37-8
Product Name:
Methidathion
Formula:
C6H11N2O4PS3
Synonyms:
S-2,3-Dihydro-5-methoxy-2-oxo-1,3,4-thiodiazol-3-yl-methyl-O,O-dimethyl-phosphodithioate
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Methidathion appears as colorless crystals. This material is used as a non-systemic insecticide. (EPA, 1998) |
|---|---|
| Color/Form | Colorless crystals |
| Odor | Organophosphate odor |
| Melting Point | 102 to 104 °F (EPA, 1998) |
| Flash Point | 100 °C |
| Solubility | Solubility (all in g/L at 20 °C): ethanol (150); acetone (670); toluene (720); hexane (11); n-octanol (14) |
| Density | 1.495 at 68 °F (EPA, 1998) - Denser than water; will sink |
| Vapor Pressure | 1e-06 mmHg at 68 °F (EPA, 1998) |
| LogP | log Kow = 2.20 |
| Stability/Shelf Life | Relatively stable to hydrolysis in neutral, or slightly acidic media, less stable in more acidic (pH 1), or in alkaline media (pH 13, 50% loss in 30 min @ 25 °C). |
| Decomposition | When heated to decomposition it emits very toxic fumes of /oxides of nitrogen, oxides of phosphorous and oxides of sulfur/. |
| Corrosivity | Non-corrosive |
| Collision Cross Section | 160.41 Ų [M+Na]+ |
| Kovats Retention Index | 2037 2037 2027 2046 2064 2058 2092 2064 2044.9 2050.2 2063.1 2050.9 2057.5 2046.8 2030 2045 2045.2 2061.5 |
| Other Experimental Properties | Volatility slight. |
| Chemical Classes | Pesticides -> Organophosphate Insecticides |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06  Environment GHS09 |
| GHS Hazard Statements |
H318:Serious eye damage/eye irritation H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P262:Do not get in eyes, on skin, or on clothing. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 302.3 g/mol |
|---|---|
| XLogP3 | 2.4 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 8 |
| Rotatable Bond Count | 6 |
| Exact Mass | 301.96185735 g/mol |
| Monoisotopic Mass | 301.96185735 g/mol |
| Topological Polar Surface Area | 143 Ų |
| Heavy Atom Count | 16 |
| Formal Charge | 0 |
| Complexity | 343 |
| 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
Methidathion appears as colorless crystals. This material is used as a non-systemic insecticide. (EPA, 1998)