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Product Name: Simetryn
Chemical Name: 2-chloro-4,6-bis(ethylthio)-1,3,5-triazine
Synonyms: Simetryne, Catex
Recommended Use: Selective herbicide for weed control in crops like rice, cotton, and corn
Supplier: Information available from manufacturer or distributor label
Emergency Phone: Relevant emergency contacts as provided on packaging
CAS Number: 1014-70-6
UN Number: 3077 (Environmentally hazardous substance, solid, n.o.s.)
GHS Classification: Acute Toxicity (Oral) Category 4, Skin Sensitization Category 1, Hazardous to Aquatic Environment—Chronic Category 2
Signal Word: Warning
Hazard Pictograms: Exclamation mark, Environment
Hazard Statements: Harmful if swallowed; may cause an allergic skin reaction; toxic to aquatic life with long lasting effects
Precautionary Statements: Avoid release to the environment, do not eat, drink or smoke when using this product, wash hands thoroughly after handling
Symptoms: Potential for nausea, headache, skin irritation, and respiratory discomfort on exposure.
Component: Simetryn
Concentration: Technical product >95% active ingredient
Other Ingredients: Inert carriers and surfactants specific to formulation but typically unspecified due to proprietary nature
Impurities: None expected at hazardous concentrations based on manufacturing standards.
Inhalation: Remove to fresh air, support respiration if necessary, seek medical advice if symptoms persist
Skin Contact: Rinse immediately with plenty of soap and water; remove contaminated clothing; consult healthcare provider if irritation or sensitization develops
Eye Contact: Rinse cautiously with water for at least 15 minutes, removing contact lenses if present, contact physician for continued discomfort
Ingestion: Do not induce vomiting; rinse mouth with water; seek immediate medical attention, showing label and SDS if possible
Most Important Symptoms: Possible skin rash, gastrointestinal upset, dizziness, and irritation of eyes or respiratory passages
Advice for Doctors: Treat symptomatically and provide supportive measures.
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide. Avoid high-pressure water jets
Unsuitable Media: Avoid direct streams of water which may spread fire
Hazardous Combustion Products: Toxic fumes of carbon oxides, nitrogen oxides, sulfur oxides, and hydrogen chloride may form
Firefighter Protection: Wear full protective clothing and self-contained breathing apparatus
Special Procedures: Prevent contaminated fire-fighting water from entering watercourses and sewers.
Personal Precautions: Use proper personal protection, including gloves, eye protection, and dust mask. Avoid breathing dust
Environmental Precautions: Prevent runoff to waterways, drains, or soil. Notify authorities if product enters water or sewer system
Containment and Cleanup: Collect spill with non-sparking tools and place in suitable, labeled containers for disposal. Avoid dust formation, ventilate area well, and decontaminate affected surfaces. Dispose of residues in compliance with regulations.
Precautions for Safe Handling: Wear recommended personal protective equipment; handle in well-ventilated areas; avoid creating dust and contact with skin, eyes, or clothing; do not eat, drink, or smoke while using this product
Storage Conditions: Store sealed in original containers in a cool, dry, well-ventilated area away from incompatible substances such as strong acids, bases, and oxidizing agents; protect from direct sunlight, moisture, and extreme temperatures
General Hygiene: Keep out of reach of children and animals. Keep storage area secure and product away from food, feed, and water sources.
Exposure Limits: No occupational exposure limits established specifically for simetryn by OSHA, NIOSH or ACGIH
Engineering Controls: Use appropriate local exhaust ventilation to minimize dust exposure
Personal Protective Equipment: Gloves resistant to chemicals (nitrile, PVC), protective goggles, and long-sleeved clothing, with a suitable dust mask or respirator if ventilation is inadequate
Hygiene Measures: Wash hands thoroughly after handling; remove contaminated clothing and wash before reuse; avoid touching face and mouth during handling.
Appearance: Fine, crystalline white to pale yellow solid
Odor: Mild characteristic odor
Melting Point: 222–224 °C
Boiling Point: Decomposes before boiling
Solubility: Slightly soluble in water, more readily soluble in most organic solvents
Vapor Pressure: Very low, not volatile under normal conditions
pH: 6.5–7.5 (1% aqueous solution)
Partition Coefficient (log Kow): 2.99
Density: About 1.2 g/cm³
Flash Point: Not flammable
Chemical Stability: Stable under normal handling and storage conditions
Reactivity: Can react with strong oxidizers or acids producing hazardous gases
Hazardous Decomposition: Forms toxic fumes on decomposition including nitrogen oxides, sulfur oxides, and hydrogen chloride
Conditions to Avoid: Exposure to moisture, heat, sunlight, and strong oxidizers
Incompatible Materials: Strong acids and bases, oxidizing materials
Acute Toxicity (Oral): LD50 (rat): ~1,400 mg/kg
Skin Corrosion/Irritation: Mildly irritating to skin
Eye Damage/Irritation: Potential irritant to eyes
Respiratory Sensitization: Sensitization possible, especially with repeated exposure
Chronic Effects: No conclusive evidence of carcinogenicity in animal studies; long-term exposure may lead to liver and kidney effects in high doses
Other Potential Effects: No mutagenic or reproductive toxicity data available from standard studies.
Environmental Toxicity: Toxic to aquatic organisms, especially fish and invertebrates
Persistence and Degradability: Moderately persistent in soil with half-life ranging from 2–8 weeks depending on environmental conditions
Bioaccumulative Potential: Moderate, based on log Kow value
Mobility in Soil: Low to moderate mobility; potential risk to groundwater in sandy soils
Other Information: Avoid use or disposal in areas with direct access to water bodies; follow buffer zones and best management practices to reduce runoff.
Waste Disposal: Dispose of content and container in accordance with local, regional, and national regulations; use licensed waste disposal contractor where possible
Container Handling: Empty containers should be triple-rinsed and either recycled or disposed of as hazardous waste
Environmental Precautions: Do not dump into drains, watercourses, or onto ground; avoid contaminating water sources and agricultural land outside target area.
UN Number: 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (Simetryn)
Transport Hazard Class: 9—Miscellaneous dangerous substances and articles
Packing Group: III
Label: Environment hazard label required
Special Provisions: Not regulated in small quantities by certain regulations but always check local, national, and international transport rules.
US EPA Registration: Registered for use as a pesticide in the United States; subject to all FIFRA regulations
EU Regulation: Banned or restricted in certain EU member states; classification based on CLP Regulation (EC) No 1272/2008
TSCA Status: Listed in US TSCA inventory
Other Regulations: Subject to local pesticide use and environmental regulations globally
WHMIS Classification (Canada): D2B (Toxic Material Causing Other Toxic Effects)
SARA Title III Reporting: Not subject to SARA 313 reporting; general chemical reporting may apply depending on state or local laws.
