Substance profile
Metribuzin
Metribuzin is colorless crytals with a weak characteristic odor.
01 · Identification
What Metribuzin is
Metribuzin is colorless crytals with a weak characteristic odor. Its molecular formula is C8H14N4OS and its molecular weight is 214.29 g/mol. It melts at 126 °C, is soluble in water.
Under the GHS it carries the signal word Warning.
Other names for Metribuzin
- metribuzin (ISO)
- 4-amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4H)-one
- 4-amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazin-5-one
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 |
|---|---|
| H302 | Harmful if swallowed. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P273, P301, P312, P314, P330, P391, P501
03 · Physical and chemical properties
Metribuzin 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 | 132 °C (269.6 °F) | at 0.0150012 mmHg (reduced pressure) | HSDB |
| Melting point | 126.2 °C (259.2 °F) | HSDB | |
| 125 °C (257 °F) | NIOSH | ||
| Density | 1.31 g/cm³ | NIOSH | |
| 1.28 g/cm³ | at 20 °C | HSDB | |
| Solubility | Sol in methanol and ethanol; very slightly soluble in water (1200 ppm). | HSDB | |
| Soluble in ... glycol ether acetate. | HSDB | ||
| Vapor pressure | 4e-7 mmHg | NIOSH | |
| 4.35e-7 mmHg | at 20 °C | HSDB | |
| Lower explosive limit (LEL) | Noncombustible Solid | NIOSH | |
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Metribuzin
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.
Solubility
In dimethylformamide 1780, cyclohexanone 1000, chloroform 850, acetone 820, methanol 450, dichloromethane 340, benzene 220, n-butanol 150, ethanol 190, toluene 87, xylene 90, n-hexane 1 (all in g/l at 20 °C).
Source: HSDB
05 · Handling and storage
Storing and handling Metribuzin
Storage conditions
Estimated shelf life in excess of 2 yr under normal storage conditions.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
None reported
Source: The National Institute for Occupational Safety and Health (NIOSH)
Reactivity
A triazine derivative. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Metribuzin in the storage compatibility matrix →