Outdoor & Yard / Compounds / Prometryn

Prometryn in the yard and garden

Moderate risk for your yard

Prometryn — herbicide.

What is prometryn?

Also known as: Prometryne, Caparol, Gesagard, Prometrex.

CAS number
7287-19-6
Molecular formula
C10H19N5S
Molecular weight
241.36 g/mol
SMILES
CC(C)NC1=NC(=NC(=N1)SC)NC(C)C
PubChem CID
4929

Risk for people, pets,

Moderate risk

Prometryn — herbicide.

Regulatory consensus

1 regulatory bodyhas classified Prometryn.

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 prometryn

  • Agricultural Products — crop treatment

Safer alternatives

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

  • 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 prometryn safe for your yard?

Prometryn — herbicide.

What products contain prometryn?

Prometryn appears in: crop treatment (Agricultural products).

See Prometryn in the outdoor app

Look up products containing prometryn, 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 →