Outdoor & Yard / Compounds / Myclobutanil

Myclobutanil in the yard and garden

Moderate risk for your yard

Not medical, veterinary, or professional safety advice, and not a substitute for a qualified professional — consult one. Full disclaimer →

Myclobutanil — fungicide. See EDC classification.

What is myclobutanil?

Also known as: Systhane, Rally, Nova, Synthane 12E.

CAS number
88671-89-0
Molecular formula
C15H17ClN4
Molecular weight
288.77 g/mol
SMILES
CCCCC(CN1C=NC=N1)(C#N)C2=CC=C(C=C2)Cl
PubChem CID
6336

Risk for people, pets,

Moderate risk

Myclobutanil — fungicide. See EDC classification.

Regulatory consensus

1 regulatory body has classified Myclobutanil.

AgencyYearClassificationNotes
EDC Assessment—Suspected endocrine disruptor

Where your yard encounter myclobutanil

  • Agricultural Products — crop treatment, soil application
  • Food Chain — residue on produce, water contamination

Safer alternatives

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

  • Integrated Pest Management (IPM); Biopesticides; Biological control
    Trade-offs: Combines biological, cultural, and targeted chemical controls; reduces overall chemical use 30-70%; requires trained practitioners and monitoring infrastructure; higher management complexity; proven effective at scale in many crop systems.
    Relative cost: 1.2-2×

Frequently asked questions

Is myclobutanil safe for your yard?

Myclobutanil — fungicide. See EDC classification.

What products contain myclobutanil?

Myclobutanil appears in: crop treatment (Agricultural products); soil application (Agricultural products); residue on produce (Food chain); water contamination (Food chain).

See Myclobutanil in the outdoor app

Look up products containing myclobutanil, 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 →