Outdoor & Yard / Compounds / Monuron

Monuron in the yard and garden

Moderate risk for your yard

Monuron — herbicide.

What is monuron?

Also known as: 3-(4-Chlorophenyl)-1,1-dimethylurea, Chlorfenidim, Lirobetarex, Monuruon.

CAS number
150-68-5
Molecular formula
C9H11ClN2O
Molecular weight
198.65 g/mol
SMILES
CN(C)C(=O)NC1=CC=C(C=C1)Cl
PubChem CID
8800

Risk for people, pets,

Moderate risk

Monuron — herbicide.

Regulatory consensus

1 regulatory bodyhas classified Monuron.

AgencyYearClassificationNotes
EDC Assessment—Suspected endocrine disruptor

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where your yard encounter monuron

  • Agricultural Products — crop treatment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Monuron:

  • Organic mulching; Mechanical weeding; IPM
    Trade-offs: Labor-intensive; effective for small-scale or precision applications; no chemical residues; not scalable to large commercial operations without significant cost increase.
    Relative cost: 2-5× conventional

Frequently asked questions

Is monuron safe for your yard?

Monuron — herbicide.

What products contain monuron?

Monuron appears in: crop treatment (Agricultural products).

See Monuron in the outdoor app

Look up products containing monuron, compare to alternatives, and explore the full data record.

Open in outdoor View raw API data

Sources (1)
  1. PubChem (2026) — database

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →