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.
02 · Identifiers
Metribuzin identifiers and molecular data
Metribuzin CAS number and EC number
Metribuzin molecular formula and molecular weight
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
03 · GHS classification
Metribuzin hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Metribuzin pictograms and signal word
Metribuzin hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 2 | H373 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | GHS09 |
Metribuzin hazard statements (H-codes)
| 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. |
This page lists only the codes assigned to Metribuzin. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Metribuzin
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Metribuzin issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Metribuzin precautionary statements
CLP Annex VI assigns 9 precautionary statements to Metribuzin. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Metribuzin name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | метрибузин (ISO) 4-амино-6- трет -бутил-3-метилтио-1,2,4-триазин-5(4 Н )-он4-амино-4,5-дихидро-6-(1,1-диметилетил)-3-метилтио-1,2,4-триазин-5-он |
| Spanish español | Metribuzina (ISO) 4-amino-6- tert -butil-3-metiltio-1,2,4-triazin-5(4 H )-ona4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-ona |
| Czech čeština | metribuzin (ISO) 4-amino-6- terc -butyl-3-methylthio-1,2,4-triazin-5(4 H )-on4-amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazin-5-on |
| Danish dansk | metribuzin (ISO) 4-amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4 H )-on4-amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazin-5-on |
| German Deutsch | Metribuzin (ISO) 4-Amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4 H )-on4-Amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazin-5-on |
| Estonian eesti | metribusiin (ISO) 4-amino-6- tert -butüül-3-metüültio-1,2,4-triasiin-5(4 H )-oon4-amino-4,5-dihüdro-6-(1,1-dimetüületüül)-3-metüültio-1,2,4-triasiin-5-oon |
| Greek ελληνικά | metribuzin (μετριβουζίνη) (ISO) 4-αμινο-6-tert-βουτυλο-3-μεθυλοθειο-1,2,4-τριαζιν-5(4 Η )-όνη4-αμινο-4,5-διυδρο-6-(1,1-διμεθυλαιθυλ)-3-μεθυλοθειο-1,2,4-τριαζιν-5-όνη |
| English English | metribuzin (ISO) 4-amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4 H )-one4-amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazin-5-one |
| French français | métribuzine (ISO) 4-amino-6-tert-butyl-3-méthylthio-1,2,4-triazin-5(4 H )-one4-amino-4,5-dihydro-6-(1,1-diméthyléthyl)-3-méthylthio-1,2,4-triazin-5-one |
| Croatian hrvatski | metribuzin (ISO) 4-amino-6- tert -butil-3-metiltio-1,2,4-triazin-5(4 H )-on4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-on |
| Italian italiano | metribuzin (ISO) 4-ammino-6-terz-butil-3-metiltio-1,2,4-triazin-5(4 H )-one4-ammino-4,5-diidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-one |
| Latvian latviešu | metribuzīns (ISO) 4-amino-6-terc-butil-3-metiltio-1,2,4-triazin-5(4 H )-onu4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazīn-5-ons |
| Lithuanian lietuvių | metribuzinas (ISO) 4-amino-6-tret-butil-3-metiltio-1,2,4-triazin-5(4 H )-onas4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-onas |
| Hungarian magyar | metribuzin (ISO) 4-amino-6-terc-butil-3-metiltio-1,2,4-triazin-5(4H)-on4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-on |
| Maltese Malti | metribużin (ISO) 4-ammino-6-tert-butil-3-metiltijo-1,2,4-triażin-5(4 H )-on4-ammino-4,5-diidro-6-(1,1-dimetiletil)-3-metiltijo-1,2,4-triażin-5-on |
| Dutch Nederlands | metribuzin (ISO) 4-amino-6- tert -butyl-3-methylthio-1,2,4-triazine-5(4 H )-on4-amino-4,5-dihydro-6-(1,1-dimethylethyl)-3-methylthio-1,2,4-triazine-5-on |
| Polish polski | metrybuzyna (ISO) 4-amino-6- tert -butylo-4,5-dihydro-3-metylotio-1,2,4-triazyn-5-on4-amino-4,5-dihydro-6-(1,1-dimetyloetylo)-3-metylotio-1,2,4-triazyn-5-on |
| Portuguese português | metribuzina (ISO) 4-amino-6- terc -butil-3-metiltio-1,2,4-triazin-5(4 H )-ona4-amino-4,5-di-hidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-ona |
| Romanian română | metribuzin (ISO) 4-amino-6-terț-butil-3-metiltio-1,2,4-triazin-5(4 H )-ona, 4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-ona |
| Slovak slovenčina | metribuzín (ISO) 4-amino-6-terc-butyl-3-(metylsulfanyl)-1,2,4-triazín-5(4 H )-ón4-amino-4,5-dihydro-6-(1,1-dimetyletyl)-3-metyltio-1,2,4-triazín-5-ón |
| Slovenian slovenščina | metribuzin (ISO) 4-amino-6-terc-butil-3-metiltio-1,2,4-triazin-5(4 H )-on4-amino-4,5-dihidro-6-(1,1-dimetiletil)-3-metiltio-1,2,4-triazin-5-on |
| Finnish suomi | metributsiini (ISO) 4-amino-6-tert-butyyli-3-metyylitio-1,2,4-triatsin-5(4 H )-oni4-amino-4,5-dihydro-6-(1,1-dimetyylietyyli)-3-metyylitio-1,2,4-triatsin-5-oni |
| Swedish svenska | metribuzin (ISO) 4-amino-6-tert-butyl-3-metyltio-1,2,4-triazin-5(4 H )-on4-amino-4,5-dihydro-6-(1,1-dimetyletyl)-3-metyltio-1,2,4-triazin-5-on |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Metribuzin GHS label elements
Everything CLP Annex VI fixes for Metribuzin, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Metribuzin
- Harmful if swallowed.
- 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>.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- IF SWALLOWED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention if you feel unwell.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Metribuzin in the GHS label constructor →
07 · Health hazards
Metribuzin health hazards and exposure limits
Metribuzin carcinogenicity classification
Cancer Classification: Group D Not Classifiable as to Human Carcinogenicity
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Metribuzin occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 5 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 5 mg/m3 | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · 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.
Metribuzin boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 132 °C (269.6 °F) | at 0.0150012 mmHg (reduced pressure) | HSDB |
Metribuzin melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 126.2 °C (259.2 °F) | HSDB | |
| 125 °C (257 °F) | NIOSH |
Metribuzin density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.31 g/cm³ | NIOSH | |
| 1.28 g/cm³ | at 20 °C | HSDB |
Metribuzin solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Sol in methanol and ethanol; very slightly soluble in water (1200 ppm). | HSDB | |
| Soluble in ... glycol ether acetate. | HSDB |
Metribuzin vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 4e-7 mmHg | NIOSH | |
| 4.35e-7 mmHg | at 20 °C | HSDB |
Metribuzin lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Noncombustible Solid | NIOSH |
Metribuzin corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Non-corrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Metribuzin fire and explosion behaviour
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.
Metribuzin fire potential
Nonflammable
Source: Hazardous Substances Data Bank (HSDB)
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
10 · Handling and storage
Metribuzin storage and handling
Metribuzin safe storage
Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Metribuzin storage conditions
Estimated shelf life in excess of 2 yr under normal storage conditions.
Source: Hazardous Substances Data Bank (HSDB)
Metribuzin incompatible materials
None reported
Source: The National Institute for Occupational Safety and Health (NIOSH)
Metribuzin 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 →
11 · Questions
Metribuzin — frequently asked questions
What is the CAS number of Metribuzin?
The CAS number of Metribuzin is 21087-64-9. Its EC number is 244-209-7.
What is the chemical formula of Metribuzin?
The molecular formula of Metribuzin is C8H14N4OS and its molecular weight is 214.29 g/mol.
What does a Metribuzin label have to show?
Under CLP Annex VI the label for Metribuzin carries the pictograms Health hazard, Exclamation mark and Environment and the signal word is Warning.
Is Metribuzin flammable?
CLP Annex VI assigns Metribuzin no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Metribuzin a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Metribuzin. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for Metribuzin?
The US occupational exposure limit reported for Metribuzin is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Metribuzin?
The boiling point reported for Metribuzin is 132 °C (269.6 °F), at 0.0150012 mmHg (reduced pressure) (HSDB).
What is the melting point of Metribuzin?
The melting point reported for Metribuzin is 126.2 °C (259.2 °F) (HSDB).
How should Metribuzin be stored?
Estimated shelf life in excess of 2 yr under normal storage conditions. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Metribuzin
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