Metamitron Property

Melting point:

165-170 °C

Boiling point:

340.33°C (rough estimate)

Density 

1.2165 (rough estimate)

refractive index 

1.6300 (estimate)

Flash point:

11 °C

storage temp. 

Keep in dark place,Inert atmosphere,Store in freezer, under -20°C

solubility 

Chloroform (Slightly), Methanol (Slightly)

pka

1.54±0.20(Predicted)

form 

Solid

color 

White to Light yellow

Water Solubility 

1.8g/L(20 ºC)

λmax

312nm(CH3CN)(lit.)

Merck 

14,5924

BRN 

613129

CAS DataBase Reference

41394-05-2(CAS DataBase Reference)

NIST Chemistry Reference

1,2,4-Triazin-5(4h)-one, 4-amino-3-methyl-6-phenyl-(41394-05-2)

EPA Substance Registry System

Metamitron (41394-05-2)

Safety

Hazard Codes 

Xn,N,T,F

Risk Statements 

22-50-39/23/24/25-23/24/25-11

Safety Statements 

61-45-36/37

RIDADR 

UN 3077 9/PG 3

WGK Germany 

2

RTECS 

XZ3015000

HazardClass 

9

PackingGroup 

III

HS Code 

29336990

Toxicity

LD50 orally in male, female rats, male, female mice: 3343, 1832, 1450, 1463 mg/kg; dermally in rats: >500 mg/kg; LC50 (4 hr) in rats, mice, hamsters (mg/m3): >331, >206, >206 by inhalation (Lembrich)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H311Toxic in contact with skin

H330Fatal if inhaled

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

Metamitron Chemical Properties,Usage,Production

Uses

Herbicide.

Definition

ChEBI: A member of the class of 1,2,4-triazines that is 1,2,4-triazin-5(4H)-one substituted by an amino group at position 4, a methyl group at position 3 and a phenyl group at position 6.

General Description

4-Amino-3-methyl-6-phenyl-1,2,4-triazin-5-one, commonly known as metamitron, is a pesticide having low polarity and is hydrophobic in nature. Its pKa value is 2.9.

Agricultural Uses

Herbicide: Metamitron is a selective systemic herbicide that is absorbed through roots and leaves and inhibits photosynthesis. It is used to control grasses and broadleaf weeds in sugar beets and fodder beets. Not currently registered in the U.S. Used in most European countries and having 34 global suppliers .

Trade name

BAY 6676®; BAY-DRW 1139®; DRW 1139®; GALAHAD®; GOLDBEET®; GOLTIX®; GOLTIX® 90; GOLTIX® SUPER; GOLTIX® WG; MM 70®; HERBRAK®; MARQUISE®; SKATER®; TORERO® (metamitron + ethofumesate)

Metabolic pathway

Degradation of metamitron by photolysis is strongly dependent on solvents and oxygen, and no photoreaction is found in methanol, acetonitrile, and hexane, nor in oxygen-free water. In water solution, photolytic degradation occurs and results in the formation of desaminometamitron and a ring-opening polar benzoylacetyl hydrazine (tentatively assigned).