Metribuzin
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Category：Agrochemicals Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Metribuzin (CAS No. 21087-64-9)
1. Basic Information
- IUPAC Name: 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
- Synonyms:
- Sencor® (Bayer trade name)
- Lexone® (DuPont trade name)
- CAS Number: 21087-64-9
- Molecular Formula: C₈H₁₄N₄OS
- Molecular Weight: 214.29 g/mol
- Appearance: White to off-white crystalline powder
- Odor: Slight sulfurous odor
2. Physical and Chemical Properties
| Property | Value |
|---|---|
| Melting Point | 125–126.5°C (257–260°F) |
| Vapor Pressure | 0.058 mPa (25°C) |
| Solubility (25°C) | – Water: 1,050 mg/L (pH 7) |
| – Acetone: 820 g/kg | |
| Log Pow | 1.65 (octanol/water) |
| Stability | Hydrolytically stable (pH 5–9) |
3. Chemical Structure
O
║
CH₃-S-C-NH
| ║
(CH₃)₃C-N=N
4. Hazards (GHS Classification)
- Acute Toxicity:
- Oral LD₅₀ (rat): 1,100–2,300 mg/kg (Category 4)
- Dermal LD₅₀ (rabbit): >20,000 mg/kg
- Environmental:
- Toxic to aquatic life (H411)
- Very toxic to terrestrial plants (H411)
- NFPA Rating: Health 2, Flammability 1, Reactivity 0
5. Storage and Handling
- Storage:
- Keep in original containers at <30°C
- Protect from moisture and direct sunlight
- Handling:
- Use chemical-resistant gloves (nitrile/Viton®)
- Avoid dust generation (use local exhaust)
6. Applications
- Herbicide:
- Selective control of broadleaf weeds in soybeans, potatoes, and cereals
- Applied pre- and post-emergence (0.25–1.0 kg a.i./ha)
- Mode of Action: Photosystem II inhibitor (triazine group)
Disclaimer:
The above content is for reference and communication only among industry insiders, and does not guarantee its accuracy or completeness. According to relevant laws and regulations and the regulations of this website, units or individuals who purchase related items should obtain valid qualifications and qualification conditions.
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