PGR
Brassinolide
Also known as: BR
24-Epibrassinolide (CAS: 78821-43-9) Activity: Its biological activity is approximately 10%–30% that of natural brassinolide. Characteristics: Although its activity is lower, in agricultural applications, a slightly higher dosage can be used to achieve visual effects comparable to those of natural brassinolide. Natural Brassinolide (CAS: 72962-43-7) Activity: It possesses the highest biological activity among all known brassinolide isomers. Characteristics: It is absorbed most rapidly by plants and exhibits the highest affinity. Even at extremely low concentrations (down to the ppb—parts per billion—level), it demonstrates potent capabilities in promoting growth, enhancing stress resistance (against cold and drought), and alleviating phytotoxicity.
Technical specifications
- Product Name
- Brassinolide
- Other Names
- BR
- Appearance
- White Powder
- Assay
- 90%
- CAS No.
- 78821-43-9
- Molecular formula
- C28H48O6
- Molecular weight
- 480.686
Package
25kg drum
Key benefits
- Ultra-High Bioactivity at Micro Dosages As a highly stable synthetic isomer, it triggers robust growth, cell elongation, and pollen development at incredibly low field concentrations.
- The Ultimate Anti-Stress Shield Significantly enhances crop tolerance to extreme temperatures (frost/heatwaves), drought, soil salinity, and herbicide phytotoxicity (chemical damage).
- Synergistic Yield Booster Acts as an excellent formulation partner. It drastically improves the absorption and efficiency of NPK fertilizers, amino acids, fungicides, and other plant hormones (like GA3).
Suggested dosage & application
- For Formulators & Manufacturers As a 90% Technical Grade concentration, this highly potent material must be formulated before field application. Solubility: Practically insoluble in water. Easily soluble in organic solvents such as methanol, ethanol, or acetone. It is typically formulated into 0.01% to 0.1% SL (Soluble Concentrate), EC, or water-soluble powders (SP/SG). Formulation Note: Highly stable under standard storage, light, and heat conditions. Maintain a neutral to slightly acidic pH in liquid formulations to guarantee long-term stability. Best Companion Matrices: Exceptionally popular when blended into macro/micronutrient liquid fertilizers or high-end amino acid and fulvic acid biostimulants to create premium "anti-stress + nutrition" crop lines.
- Reference Field Application Rates To Relieve Stress & Recovery: Spray at 0.02 to 0.05 mg/L immediately following frost, severe drought, or pesticide injury to preserve chlorophyll, stabilize cell membranes, and jumpstart crop recovery. To Enhance Pollination & Fruit Set: Apply a foliar spray at 0.05 to 0.1 mg/L during the budding and early flowering stages to boost pollen viability, improve fruit set, and reduce blossom drop. To Accelerate Fruit Sizing & Coloring: Spray at 0.05 mg/L during the early fruit expansion stage to promote uniform cell elongation, speed up sugar accumulation, and enhance fruit color. Optimal Efficiency: Apply as a uniform fine mist to maximize leaf absorption. Even coverage is essential, as this premium molecule functions as a systemic trigger across the entire plant.
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