Tebuthiuron

Formula: C9H16N4OS
Molecular weight: 228.315
CAS Registry Number: 34014-18-1

Appearance: Tebuthiuron is an off-white to buff-coloured crystalline solid with a pungent odour.
Chemical name: 1-(5-tert-butyl-1,3,4-thiadiazol-2-yl)-1,3-dimethylurea
Water solubility: 2500 mg/L at 25°C (reference/typical value)
Solubility in other solvents: Insoluble (i.s.) in benzene and hexane; slightly soluble (s.s.) in chloroform, methanol, acetone, and acetonitrile
Melting point: 161.5–164°C (decomposition)
Vapour pressure: 0.27 mPa at 25°C
Partition coefficient: 1.7853 at 25°C and pH 7 (reference/typical value)
Adsorption coefficient: 80

ADR/RID
UN number: UN3077
Proper shipping name: Environmentally hazardous substance, solid, n.o.s. (Tebuthiuron)
UN classification: 9, subsidiary hazard class
Packing group: III
Marine pollutant: Yes

Hazard statements
H302 - Harmful if swallowed
H410 - Very toxic to aquatic life with long lasting effects
H400 - Very toxic to aquatic life
H371 - May cause damage to the following organs: central nervous system
Precautionary statements (Prevention)
• Do not breathe dust/fume/gas/mist/vapours/spray
• Wash face, hands and any exposed skin thoroughly after handling
• Do not eat, drink or smoke when using this product
• Avoid release to the environment

Tebuthiuron is a relatively non-selective, soil-activated herbicide that acts by inhibiting photosynthesis. It is used to control a broad range of herbaceous, woody, annual and perennial weeds in non-cropland areas, rights-of-way, and industrial sites.

Tebuthiuron is a broad-spectrum herbicide for weed control in non-cropland areas, rangelands, rights-of-way, and industrial sites. It is effective against woody and herbaceous plants in grasslands and sugar cane. Weeds controlled by tebuthiuron include alfalfa, bluegrasses, chickweed, clover, dock, goldenrod, mullein, and others. Woody plants require 2 to 3 years to be completely controlled.

Tebuthiuron can be applied by spraying or by spreading dry on the soil surface in the form of granules or pellets, preferably just before or during the period of active weed growth. It is compatible with other herbicides.