Methabenzthiazuron Property

Melting point:

119-120.5°

Density 

1.2527 (rough estimate)

refractive index 

1.6740 (estimate)

Flash point:

11 °C

storage temp. 

APPROX 4°C

solubility 

DMSO, Methanol (Sparingly)

pka

12.83±0.46(Predicted)

color 

Off-White to Pale Beige

Water Solubility 

59mg/L(20 ºC)

Merck 

14,5939

BRN 

196633

EPA Substance Registry System

Methabenzthiazuron (18691-97-9)

Safety

Hazard Codes 

N,T,F

Risk Statements 

50/53-39/23/24/25-23/24/25-11

Safety Statements 

60-61-45-16-7

RIDADR 

UN 3077 9/PG 3

WGK Germany 

2

RTECS 

YR8980000

HazardClass 

9

PackingGroup 

III

HS Code 

29342000

Toxicity

LD50 in mice (mg/kg): >1000 orally; in male, female rats (mg/kg): >2500, >2500 orally; 540, 315 i.p. (Kimmerle, Lser)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

Methabenzthiazuron Chemical Properties,Usage,Production

Chemical Properties

White crystalline solid; melts at 120°C(248°F); insoluble in water [～59 ppm at20°C (68°F)], soluble in organic solvents.

Uses

Methabenzthiazuron is a benzothiazole and urea based herbicide used to control a spectrum of broad-leaved weeds and grasses crops. Methabenzthiazuron works via the inhibition of photosynthetic electron transport chain.

Uses

Selective herbicide.

Definition

ChEBI: Methabenzthiazuron is a member of benzothiazoles.

Health Hazard

Gupta and Singh (1985) investigated thetoxicity of tribunil in calves. Animals treatedwith 500 mg/kg orally developed toxicityin 36–48 hours. The symptoms includedincrease in body temperature, depression,and a progressive decrease in respiration rateand pulse rate. Necropsy findings in animalsthat died showed congestion of the lungs.Other organs affected were liver, kidney,urinary bladder, spleen, heart, and brain.A 75-mg/kg dose produced toxicity after2–3 weeks.

Metabolic pathway

When methabenzthiazuron is presowing applied to the soil of pea fields, three degradation products are detected as (2-benzothiazoyl)urea, 2- (methylamino)benzothiazole and 2- aminobenzothiazole. The latter two amines represent a majority of the soil bound residues.