Product Specification: Paclobutrazol 95% TC

Product Name: Paclobutrazol 95% TC
Chemical Name: (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pentan-3-ol
CAS Number: 76738-62-0
Molecular Formula: C₁₅H₂₀ClN₃O
Molecular Weight: 293.79 g/mol
Formulation Type: Technical Concentrate (TC)
Active Ingredient Content: ≥95.0% (by HPLC or GC)

Description:

Paclobutrazol 95% TC is a triazole-based plant growth regulator widely used to control vegetative growth, promote flowering and fruiting, and enhance stress tolerance in various crops. It functions primarily by inhibiting gibberellin biosynthesis, leading to reduced shoot elongation and more compact plant architecture.

This high-purity technical concentrate is used as a raw material for manufacturing various formulations such as wettable powders, granules, and soluble concentrates. It is applied in agriculture, horticulture, and forestry to improve crop yield and quality.

Physical and Chemical Properties:

• Appearance: Off-white to light brown crystalline powder

• Odor: Characteristic mild odor

• Melting Point: Approximately 105–110°C

• Solubility:

  • Slightly soluble in water (<1 mg/L at 20°C)

  • Soluble in organic solvents such as methanol, acetone, and ethanol

• Density: Approximately 1.2 g/cm³

• Stability: Stable under recommended storage conditions; sensitive to prolonged exposure to light and moisture

Specification Parameters:

Mode of Action:

Paclobutrazol inhibits the biosynthesis of gibberellins, a class of plant hormones responsible for cell elongation and division. By reducing gibberellin levels, paclobutrazol restricts excessive vegetative growth, resulting in shorter, sturdier plants with enhanced root development. This modulation improves nutrient uptake, drought resistance, and overall crop performance.

Applications:

• Agriculture:

  • Growth retardant in cereals, fruits, and vegetable crops to improve yield and quality

  • Enhances fruit setting, size, and shelf life in orchards

• Horticulture:

  • Used in ornamentals and turf management for compact growth and stress tolerance

• Forestry:

  • Promotes root development and controls excessive height growth in seedlings

• Formulated Products:

  • Wettable powders (WP)

  • Granules (GR)

  • Soluble concentrates (SL)

Toxicological Profile:

• Oral LD₅₀ (rat): >2000 mg/kg (low toxicity)

• Skin Irritation: Mild irritant

• Eye Irritation: Mild irritant

• Sensitization: Not a sensitizer

• Environmental Impact: Low toxicity to mammals and birds; biodegradable in soil with moderate persistence; non-toxic to bees

Packaging and Storage:

• Packaging: Packed in moisture-proof polyethylene bags, fiber drums, or multi-layer paper bags with liners. Common pack sizes include 5 kg, 10 kg, 25 kg.

• Storage Conditions: Store in a cool, dry, and well-ventilated area away from direct sunlight, moisture, and incompatible materials. Keep containers tightly closed.

• Shelf Life: Minimum 24 months under recommended conditions

Safety and Handling:

• Use appropriate personal protective equipment (PPE) including gloves, masks, and goggles when handling

• Avoid inhalation, ingestion, and skin or eye contact

• Follow local regulations regarding disposal and environmental protection

Conclusion:

Paclobutrazol 95% TC is a high-purity plant growth regulator used extensively to control plant height, enhance fruiting, and improve stress tolerance in a variety of crops. Its effective modulation of gibberellin biosynthesis makes it a valuable tool in modern agriculture and horticulture. Proper storage and handling ensure product stability and safety.