Agent Name

Thidiazuron

CAS Number

51707-55-2

Formula

C9-H8-N4-O-S

Major Category

Pesticides

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

EPA Pesticide Chemical Search

Exposure Assessment
Vapor Pressure

2.3E-11 mm Hg

Lethal Concentration

LC50 (rat) > 3,480 mg/m3

Adverse Effects
Neurotoxin

Other CNS Neurotoxin

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: