Outdoor & Yard / Compounds / Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea)

Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) in the yard and garden

High risk for your yard

GHS Danger classification. Organ damage.

What is diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea)?

The IUPAC name is 3-(3,4-dichlorophenyl)-1,1-dimethylurea.

Also known as: 3-(3,4-dichlorophenyl)-1,1-dimethylurea, diuron, DCMU, Duran.

IUPAC name
3-(3,4-dichlorophenyl)-1,1-dimethylurea
CAS number
330-54-1
Molecular formula
C9H10Cl2N2O
Molecular weight
233.09 g/mol
SMILES
CN(C)C(=O)NC1=CC(Cl)=C(Cl)C=C1
PubChem CID
3120

Risk for people, pets,

High risk

GHS Danger classification. Organ damage.

Regulatory consensus

4 regulatory and scientific bodies have classified Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / EPA OPP—Known/Likely
EPA CTX / CalEPA—Known human carcinogen
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 8 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 8 negative reports)

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 diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea)

  • Agricultural Products — Treated grains and legumes, Crop residues
  • Drinking Water — Municipal water supplies in agricultural regions

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea):

  • Physical/mechanical pest control (IPM)
    Trade-offs: More labor-intensive. May not be sufficient for severe infestations.
    Relative cost: 1.2-2×

Frequently asked questions

Is diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) safe for your yard?

GHS Danger classification. Organ damage.

What products contain diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea)?

Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) appears in: Treated grains and legumes (Agricultural products); Crop residues (Agricultural products); Municipal water supplies in agricultural regions (Drinking water).

Why do regulators disagree about diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea)?

Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) has been classified by 4 agencies including EPA CTX / EPA OPP, EPA CTX / CalEPA, EPA CTX / Genetox, EPA CTX / Genetox, with differing conclusions. 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. See the regulatory consensus table on this page for the full picture.

See Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) in the outdoor app

Look up products containing diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea), compare to alternatives, and explore the full data record.

Open in outdoor View raw API data

Sources (3)
  1. PubChem Compound CID 3120 — database
  2. EPA CompTox Chemicals Dashboard — DTXSID0020446 — epa
  3. ATSDR Toxicological Profile — CAS 330-54-1 — reference

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 →