Thidiazuron

Agent Name
Thidiazuron
CAS Number
51707-55-2
Formula
C9-H8-N4-O-S
Major Category
Pesticides
Thidiazuron formula graphical representation
Synonyms
(N-1,2,3-Thiadiazolyl-5)-N'-phenylurea; 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea; Defolit; Dropp; N-Phenyl-N'-1,2,3-thiadiazol-5-yl-urea; SN 49537; Urea, N-phenyl-N'-1,2,3-thiadiazol-5-yl- (9CI); N-Phenyl-N'-1,2,3-thiadiazol-5-ylurea; Urea, 1-phenyl-3-(1,2,3-thiadiazol-5-yl)-; [ChemIDplus] DROPP 50WP; DROPP SC; Ginstar EC; FreeFall; Leafless; Thidiazuron 50 WSB; [Reference #1]
Category
Herbicides, Urea Derivative
Description
Colorless odorless solid; [HSDB] Technical product is yellowish-brown solid; Formulated as wettable powder, soluble concentrate, and emulsifiable concentrate; [Reference #1]
Sources/Uses
Used as defoliant and to stimulate kiwi fruit growth; [ChemIDplus] Used as a plant growth regulator in tissue culture and a cotton defoliant; [Merck Index] Used as a pre-harvest cotton defoliant; [Reference #1]
Comments
Low acute toxicity; “Not likely to be carcinogenic to humans.” Feeding studies of animals for neurotoxicity were negative; [Reference #1] Causes excitement in oral lethal-dose studies of mice, guinea pigs, rabbits, and rats; [RTECS] An irritant; May cause CNS depression; Toxic by inhalation; Harmful by skin absorption; Targets nerves and kidneys; [Aldrich MSDS]
Reference Link #1
Biomedical References

Exposure Assessment

Vapor Pressure
2.3E-11 mm Hg
Lethal Concentration
LC50 (rat) > 3,480 mg/m3

Adverse Effects

Neurotoxin
Other CNS neurotoxin

Diseases, Processes, and Activities Linked to This Agent

Processes

Industrial Processes with risk of exposure: