Paclobutrazol

Synonym(s):α-tert-Butyl-β-(4-chlorobenzyl)-1H-1,2,4-triazole-1-ethanol;Paclobutrazol

CAS NO.：76738-62-0
Empirical Formula: C15H20ClN3O
Molecular Weight: 293.8
MDL number: MFCD00468120
EINECS: 616-379-6
SAFETY DATA SHEET (SDS)
Update Date: 2025-12-04 18:00:12

What is Paclobutrazol?

Description

Paclobutrazol (PBZ) is a triazole-containing plant growth retardant that is known to inhibit the biosynthesis of gibberellins. It also has antifungal activities. PBZ, which is transported acropetally in plants, can also suppress the synthesis of abscisic acid and induce chilling tolerance in plants. PBZ is typically used to support research on the role of gibberellins in plant biology.

The Uses of Paclobutrazol

Paclobutrazol is a triazole fungicide used as an plant growth retardant in inhibiting gibberellin biosynthesis.

The Uses of Paclobutrazol

Plant growth regulator.

What are the applications of Application

Paclobutrazol is a triazole antifungal

Definition

ChEBI: (R,R)-paclobutrazol is a 1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol in which both stereocentres have R configuration. It is an enantiomer of a (S,S)-paclobutrazol.

Agricultural Uses

Plant growth regulator: Used by arborists to maintain deciduous and broadleaf trees near buildings, reduce the growth of trees near power lines, and extend the longevity of trees on sites with limited natural resource.

Trade name

BONZI®; CLIPPER®; CULTAR®; ICI-PP 333®; MON-7325®[C]; PARLAY®; PICCOLO®; PP 333®; PROFILE®; TURF MANAGER®

Properties of Paclobutrazol

Melting point:	165-166°C
Boiling point:	460.9±55.0 °C(Predicted)
Density	1.22
storage temp.	0-6°C
solubility	DMF: 10 mg/ml,DMSO: 10 mg/ml,Ethanol: 10 mg/ml,Ethanol:PBS(pH 7.2) (1:1): 0.5 mg/ml
pka	13.92±0.20(Predicted)
form	Solid
form	neat
color	White to Almost white
Sensitive	Hygroscopic
λmax	218nm(lit.)
Merck	14,6984
CAS DataBase Reference	76738-62-0(CAS DataBase Reference)
NIST Chemistry Reference	Paclobutrazol(76738-62-0)
EPA Substance Registry System	Paclobutrazol (76738-62-0)

Safety information for Paclobutrazol

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Exclamation Mark Irritant GHS07 Health Hazard GHS08 Environment GHS09
GHS Hazard Statements	H228:Flammable solids H319:Serious eye damage/eye irritation H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273:Avoid release to the environment. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P308+P313:IF exposed or concerned: Get medical advice/attention.