Metsulfuron Methyl 20% WP

CAS Number: 74223-64-6

Molecular Formula: C14H15N5O6S

Systemic Sulfonylurea HerbicideFAO Recognized formulationHRAC group B (ALS inhibitors)Broadleaf weed controlISO Plant Metsulfuron

About Metsulfuron Methyl 20% WP

A post-emergence, systemic sulfonylurea (Metsulfuron-methyl) herbicide characterized by ultra-low application rates (4–8 g/ha). Metsulfuron acts by inhibiting the ALS (acetolactate synthase) enzyme in broadleaf weeds and sedges, disrupting amino acid synthesis and halting cell division. Despite its potency generally, m...

Variants

Metsulfuran + Chlorimuran Bulk

CAS: 74223-64-6

Metsulfuron Methyl 10 + Chlorimuron Ethyl 10% WP

CAS: 74223-64-6

Metsulfuron Methyl 20% WP Specifications

CAS Number

74223-64-6

Molecular Formula

C14H15N5O6S

Molecular Weight

381.36 g/mol

IUPAC Name

methyl 2-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl]benzoate

Canonical SMILES

CC1=NC(=NC(=N1)OC)NC(=O)NS(=O)(=O)C2=CC=CC=C2C(=O)OC

InChI Key

RSMUVYRMZCOLBH-UHFFFAOYSA-N

UNSPSC Code

10191500

HSN No

38089390

CAS Number

74223-64-6

Molecular Formula

C14H15N5O6S

Molecular Weight

381.36 g/mol

IUPAC Name

methyl 2-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl]benzoate

Canonical SMILES

CC1=NC(=NC(=N1)OC)NC(=O)NS(=O)(=O)C2=CC=CC=C2C(=O)OC

InChI Key

RSMUVYRMZCOLBH-UHFFFAOYSA-N

UNSPSC Code

10191500

HSN No

38089390

Appearance

White to off white in color

Active Content (% m/m)

20.08%

Melting Point

163 °C

Molecular Weight

381.36 g/mol

Odor

Faint, sweet, ester

GHS Classification

Category 9 (Environmental Hazard)

Hazard Classification

H302: Harmful if swallowed H373: May cause organ damage from prolonged exposure H400: Very toxic to aquatic life H410: Very toxic to aquatic life with long-lasting effects

Labeling Requirement

Must carry aquatic toxicity and exposure precautions

Toxicity Class

WHO Class U (Unlikely to present acute hazard) / Most assessments are pointing low mammalian toxicity. Listed as HRAC group B (ALS inhibitors)

Rice and Sugarcane Crop Use

Effective in direct-seeded rice and sugarcane plantations where selective control of broadleaf species and sedges is critical.

Pasture Management & Land Clearing

Applied in pastures to manage perennial broadleaf weeds with residual effect, allowing better grass dominance and regrowth.

Post-Emergence Weed Control in Cereal Crops

Used in wheat, barley, and oats to eliminate broadleaf weeds like Chenopodium, Vicia, and Melilotus, typically applied 25–30 days after sowing or after first irrigation.

Tank Mix Compatibility

Compatible with non-ionic surfactants & other herbicides, allowing integrated weed management with multi role effective chemical action.

Supplier Specific End Use

*Ultra-Low Application Rate: Effective at just 4–8 grams of active ingredient per hectare *Systemic Action: Rapid absorption through foliage and translocation to meristematic tissues *Residual Activity: Prolonged weed suppression with minimal reapplication *Crop-Safe: High tolerance in cereals, rice, sugarcane, and grasses

FAO Specification

Recognized for WP formulation under international herbicide standards. Others specifications exist for TC, WG, and WP. AI purity ≥960 g/kg and defined impurity limits.