Overview
Uniconazole is a triazole-class plant growth regulator with fungicidal properties, first introduced in the 1980s. It inhibits gibberellin biosynthesis, effectively reducing stem elongation and improving plant architecture. Its systemic action allows for foliar or soil application, making it versatile for agricultural use. As a potent plant growth retardant, uniconazole is particularly valued in high-value crops like rice, ornamentals, and fruit trees. It helps manage excessive vegetative growth, redirecting energy toward reproductive development and yield formation. The compound also exhibits stress-protective effects, enhancing plant tolerance to drought and other abiotic stresses.
Physical and Chemical Properties
Uniconazole appears as a white to off-white crystalline powder with a melting point range of 147-150°C. Its molecular structure features a chlorophenyl group and a triazole ring, contributing to both its growth regulation and fungicidal activities. The compound shows limited water solubility but dissolves well in common organic solvents. The chemical is stable under normal storage conditions but may decompose when exposed to strong acids or bases. Its vapor pressure is low, indicating minimal volatility. These properties influence formulation choices, with wettable powders and soluble concentrates being common commercial forms.
Main Applications
In rice cultivation, uniconazole controls lodging by reducing culm length while strengthening stem walls. For fruit trees like apples and peaches, it promotes flower bud formation and improves fruit set. The compound also finds use in greenhouse ornamentals to produce compact, marketable plants without excessive pruning. Beyond growth regulation, uniconazole suppresses fungal pathogens such as powdery mildew and rusts through its triazole moiety. This dual functionality makes it economically attractive for integrated crop management. Recent research explores its potential in stress mitigation, particularly for crops facing climate variability.
Safety and Storage
Uniconazole is classified as moderately hazardous (WHO Class II) and requires careful handling. Personal protective equipment including gloves, goggles, and respirators should be used during mixing and application. The compound may cause eye irritation and skin sensitization in some individuals. Storage recommendations include keeping containers tightly sealed in well-ventilated areas at temperatures below 30°C. Incompatible materials include strong oxidizers. Spill management involves containment with inert absorbents, avoiding water runoff that could contaminate waterways. Regulatory limits for residues vary by crop and country, necessitating pre-harvest interval observance.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with GMP certification and batch-specific certificates of analysis verifying purity (typically 95-98%). Technical-grade material is commonly available in 25kg fiber drums or custom packaging. Consider formulation compatibility—some processors prefer pure active ingredient for custom blends. Supply chain factors include lead times (often 4-8 weeks for international orders) and incoterms clarity. Many manufacturers require minimum order quantities of 100kg. Regulatory documentation such as SDS and import permits should be confirmed beforehand, especially for cross-border transactions. Sample testing for efficacy in target crops is advisable before large purchases.
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