C9H8N4OS
220.25 g/mol
AgrochemicalWarning
1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea
CAS51707-55-2EC257-356-7
Category
Agrochemical
Compound Class
Heterocycle
Primary Use
plant growth regulator and defoliant
Thidiazuron is a member of the urea class of compounds, used as a plant growth regulator and defoliant. It is commonly applied to cotton to induce defoliation prior to harvest and exhibits cytokinin activity that can stimulate fruit growth, such as in kiwi.
Defoliant for cottonPlant growth regulator in tissue cultureStimulation of kiwi fruit growth
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Reading
Safety Reference
Warning
H312Harmful in contact with skin
H332Harmful if inhaled
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea (CAS 51707-55-2) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
1-phenyl-3-(thiadiazol-5-yl)urea
InChIKey
HFCYZXMHUIHAQI-UHFFFAOYSA-N
SMILES
C1=CC=C(C=C1)NC(=O)NC2=CN=NS2
Synonyms (21)
- TDZ
- Avguron
- Caswell No. 659A
- Defolit
- Dropp
- Thidiauron
- Thidiazuran
- Thidiazuron, PESTANAL(R)
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