Outdoor & Yard / Compounds / 2-4-5-T

2-4-5-T in the yard and garden

Moderate risk for your yard

2-4-5-T — herbicide.

What is 2-4-5-t?

Also known as: 2,4,5-trichlorophenoxyacetic acid, 2,4,5-T, 2-(2,4,5-trichlorophenoxy)acetic acid, Trioxon.

CAS number: 93-76-5
Molecular formula: C8H5Cl3O3
Molecular weight: 255.5 g/mol
SMILES: C1=C(C(=CC(=C1Cl)Cl)Cl)OCC(=O)O
PubChem CID: 1480

Risk for people, pets,

Moderate risk

2-4-5-T — herbicide.

Regulatory consensus

1 regulatory bodyhas classified 2-4-5-T.

Agency	Year	Classification	Notes
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 2-4-5-t

Agricultural Products — crop treatment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to 2-4-5-T:

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 2-4-5-t safe for your yard?

2-4-5-T — herbicide.

What products contain 2-4-5-t?

2-4-5-T appears in: crop treatment (Agricultural products).

See 2-4-5-T in the outdoor app

Look up products containing 2-4-5-t, compare to alternatives, and explore the full data record.

Open in outdoor View raw API data

Sources (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 →