Substance profile
Chlormephos
Chlormephos is a colorless liquid.
01 · Identification
What Chlormephos is
Chlormephos is a colorless liquid. Its molecular formula is C5H12ClO2PS2 and its molecular weight is 234.7 g/mol.
Under the GHS it carries the signal word Danger.
Other names for Chlormephos
- chlormephos (ISO)
- S-chloromethyl O,O-diethyl phosphorodithioate
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 |
|---|---|
| H310 | Fatal in contact with skin. |
| H300 | Fatal if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P270, P273, P280, P301, P302, P310, P330, P352, P391, P501
03 · Physical and chemical properties
Chlormephos 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 |
|---|---|---|---|
| Boiling point | 83 °C (181.4 °F) | range, midpoint shown, at 0.1 mmHg (reduced pressure) | HSDB |
| 83.06 °C (181.5 °F) | range, midpoint shown, at 0.1 mmHg (reduced pressure) | CAMEO | |
| Density | 1.26 g/cm³ | CAMEO | |
| 1.26 g/cm³ | at 20 °C | HSDB | |
| Solubility | Miscible with most organic solvents | HSDB | |
| 60 mg/l water at 20 °C | at 20 °C | HSDB | |
| Solubility in water, g/100ml at 20 °C: 0.006 (very poor) | at 20 °C | ICSC | |
| Vapor pressure | 0.057 mmHg | at 30 °C | HSDB |
| 0.0056 mmHg | at 30 °C | CAMEO | |
| Flash point | 100 °C (212 °F) | above this value | ICSC |
| Lower explosive limit (LEL) | Combustible. | HSDB | |
| Corrosivity | Corrosive to some metals. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Chlormephos
Storage conditions
Rooms used for storage only should be soundly constructed & fitted with secure locks. Floors should be kept clear & pesticides clearly identified. If repacking is carried out in storage rooms, adequate light should be available; floors should be impervious & sound ... . /Pesticides/
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Organophosphates, such as CHLORMEPHOS, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Chlormephos in the storage compatibility matrix →