Thidiazuron

  • N-Phenyl-N'-1,2,3-thiadiazol-5-yl urea
  • 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea
Formula
C9H8N4OS
Structure
Uses
Cotton defoliant.

Registry Numbers and Inventories.
CAS
51707-55-2
EC (EINECS/ELINCS)
257-356-7
36/37/38
22 26 36
RTECS
YU1395000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector
Merck
12,9447
Beilstein/Gmelin
1078092
Beilstein Reference
6-27
EPA OPP
208800
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C9H8N4OS
Formula mass
220.25
Melting point, °C
217
Solubility in water
Slightly soluble
pKa/pKb
10.06 (pKa)

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Compatible chemical-resistant gloves.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Nitrogen oxides, Sulfur oxides.

Fire.
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Irritant. Irritating to eyes, respiratory system and skin. Target organ(s): Nerves. Kidneys.
   Ingestion
May be harmful if swallowed.
   Inhalation
Material is irritating to mucous membranes and upper
   Skin
Causes skin irritation. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.