Substance profile
Vamidothion
Vamidothion is colorless needles.
01 · Identification
What Vamidothion is
Vamidothion is colorless needles. It melts at 43 °C.
Under the GHS it carries the signal word Danger.
Other names for Vamidothion
- vamidothion (ISO)
- O,O-dimethyl S-2-(1-methylcarbamoylethylthio) ethyl phosphorothioate
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H301 | Toxic if swallowed. |
| H312 | Harmful in contact with skin. |
| H400 | Very toxic to aquatic life. |
Precautionary statements: P270, P273, P280, P301, P302, P310, P312, P330, P352, P391, P501
03 · Physical and chemical properties
Vamidothion properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 43 °C (109.4 °F) | HSDB | |
| 40 °C (104 °F) | technical vamidothion | HSDB | |
| 47 °C (116.6 °F) | range, midpoint shown | ICSC | |
| Solubility | Solubility in water: very good | ICSC | |
| In water, 4 kg/L at 20 °C | at 20 °C, miscible | HSDB | |
| Vapor pressure | 0.00000137 mmHg | Haz-Map | |
| negligible at room temperature | ICSC | ||
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Vamidothion
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Physical behaviour
Undergoes slight decomp at room temperature, but solutions in organic solvents (methyl ethyl ketone, cyclohexane) are stable. Decomposes in strong acid or alkaline media. VP: negligible at 20 °C.
Source: HSDB
Solubility
Readily soluble in ... benzene, toluene, methyl ethyl ketone, ethyl acetate, acetonitrile, dichloromethane, cyclohexanone, chloroform (all at 1 kg/L). Almost insol in cyclohexane and petroleum ether.
Source: HSDB