Chemical Name: 2RS, 3RS)-1-(4-chlorophenyl )-4, 4-dimethyl-2-(1H-1, 2, 4-triazole-1-yl) -amylalcohol–3.
FORMULA : C₁₅H₂₀ClN₃O.
M. W. : 293.5
CAS NO.: 76738-62-0.
Appearance: Milk-white odorless liquid.
Melting Point: 165°C.
Vapour Pressure: 3kPa at 20°C.
Stability: variable in range of organic solvents.
Toxicity: Oral LD50 (Rat)>5,346 mg/kg. Skin LD50 (Rabbit) >1,000 mg/kg.
SPECIFICATIONS: 95%TC, 15%WP, 25%SC
Mode of action: Plant growth regulator taken up into the xylem through the leaves, stems, or roots, and translocated to growing sub-apical meristems. Produces more compact plants and enhances flowering and fruiting.

Uses: paclobutrazol is Used on fruit trees to inhibit vegetative growth and to improve fruit set; on pot-grown ornamentals and flower crops (e.g. chrysanthemums, begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, and increase yield; on turf to retard growth; and on grass seed crops to reduce height and prevent lodging. To be applied as a foliar spray, as a soil drench, or by trunk injection. Has some fungicidal activity against mildew and rusts.