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  • industrial

Paclobutrazol

CAS 76738-62-0 · 100/100 · High conf.

Also registered as 8 other CAS numbers

66346-05-2 · 77108-06-6 · 106357-76-0 · 113932-85-7 · 115509-55-2 · 128224-38-4 · 1135441-35-8 · 1180558-13-7

Paclobutrazol chemical structure

Concern score

100/100Critical concern based on regulatory listings.
High confidence

Paclobutrazol in plain language

What it is

Also known as 2S,3S-Paclobutrazol · Bonzi · Caswell No. 628C · Clipper · Clipper 50WP · Cultar

Show all 11 names

Duo Xiao Zuo · Friazole · Parlay · Trimmit · paclobutrazol manufacturing concentrate

What it does

We don't have a plain-language description for Paclobutrazol yet.

Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

Paclobutrazol (ISO); (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl- 2-(1H-1,2,4-triazol-1- yl)pentan-3-ol is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — banned

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

Restrictions first, then routine listings from published regulatory sources.

  • EU Annex II — prohibited
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Industrial

  • EUEC

    Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

    banned
    View source →
  • EUCosIngActiveCosmetics Regulation annex II / ref 1664.
    • Cosmetics Regulation annex II / ref 1664.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 7 composition records across product categories including Landscape/yard.
    • EPA CPDat observed this chemical in 7 composition records across product categories including Landscape/yard.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Paclobutrazol. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for Paclobutrazol yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2021-11-03

    Open →

  • EPA Chemical and Products Database

    exposure · updated May 2014

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Paclobutrazol in a product composition. These are source records, not Greenveil catalog products.

Source records

7

Named organisations

6

Landscape/yard
See products using Paclobutrazol →