Substance profile
Mercaptodimethur (ISO)
Mercaptodimethur (ISO) is colorless crystals with a phenol-like odor.
01 · Identification
What Mercaptodimethur (ISO) is
Mercaptodimethur (ISO) is colorless crystals with a phenol-like odor. It boils at 325 °C, melts at 119 °C.
Under the GHS it carries the signal word Danger.
Other names for Mercaptodimethur (ISO)
- methiocarb (ISO)
- 3,5-dimethyl-4-methylthiophenyl N-methylcarbamate
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. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P270, P273, P301, P310, P330, P391, P501
03 · Physical and chemical properties
Mercaptodimethur (ISO) 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 | 325 °C (617 °F) | at 760 mmHg | DOE PAC |
| Very high. (USCG, 1999) | CAMEO | ||
| Melting point | 119 °C (246.2 °F) | HSDB | |
| 117.22 °C (243 °F) | CAMEO | ||
| Density | 1 g/cm³ | CAMEO | |
| Solubility | 200 g/l in dichloromethane; 53 g/l in isopropanol; 33 g/l in toluene; 1.3 g/l in hexane | HSDB | |
| Soluble in organic solvents. | HSDB | ||
| In water, 27 mg/l @ 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 0.0001 mmHg | CAMEO | |
| 1.125e-7 mmHg | at 20 °C | ICSC | |
| 2.7e-7 mmHg | at 25 °C | HSDB | |
| Lower explosive limit (LEL) | Dust may be explosive. | HSDB | |
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Mercaptodimethur (ISO)
Incompatible materials
Unstable in highly alkaline media.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
MERCAPTODIMETHUR is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Mercaptodimethur (ISO) in the storage compatibility matrix →