Brassinolide

Brassinolide Plant Regulator for Modern Agriculture

Overview

Brassinolide is a brassinosteroid-type plant growth regulator used in agricultural formulations. The technical material is generally supplied as a white crystalline powder, while formulated products may include soluble liquids, soluble powders, and emulsifiable concentrates.

Commercial technical grades are commonly standardized at 90%–95% active content. Formulated products may contain substantially lower concentrations, including 0.01% and 0.1% grades, depending on the intended formulation and application method.

Brassinolide is incorporated into agricultural plant growth regulator products for foliar application, fertigation, and compatible fertilizer blends. Formulation development should consider active content, solubility, application concentration, pH, and stability under the intended storage conditions.

Technical Specifications

Functional and Formulation Characteristics

Brassinolide is active at relatively low formulation concentrations, making accurate dilution and uniform distribution important during product development. Technical material and finished formulations should be distinguished when comparing specifications because their active concentrations differ substantially.

Important formulation characteristics include:

• Technical material is available as a high-content crystalline powder.
• Low-concentration agricultural formulations can be prepared for practical application.
• Suitable for selected liquid and powder formulation systems.
• Active content can be determined by HPLC.
• Formulation pH should be controlled according to product requirements.
• Storage stability should be evaluated for the finished formulation.

Solubility and dispersion characteristics are important when preparing concentrated products from technical-grade material. The formulation system should provide consistent distribution of the active component throughout manufacturing, storage, dilution, and application.

Application Context

Brassinolide is used in plant growth regulator formulations intended for agricultural crops. Foliar spray products represent an important application format because low-concentration formulations can be diluted according to the specific crop and application program.

It may also be incorporated into compatible fertigation products and fertilizer blends. When used in multi-component formulations, compatibility with other ingredients should be evaluated before establishing the final composition.

Agricultural formulations containing Brassinolide may be designed for growth-management programs, flowering and fruit-setting management, and applications associated with environmental or cultivation stress. Performance depends on crop species, growth stage, application concentration, timing, environmental conditions, and the complete formulation.

Product claims and application rates should follow the registration and regulatory requirements applicable to the intended market and crop.

Composition and Standardization

Technical-grade Brassinolide is primarily standardized according to active content. Commercial technical material may be specified at 90%–95%, while finished formulations can be standardized at lower concentrations such as 0.01% or 0.1%.

Routine quality-control parameters include:

• Brassinolide content.
• HPLC assay.
• Physical appearance.
• pH for applicable formulations.
• Heat-storage stability.
• Batch consistency.

When comparing products, buyers should clearly distinguish technical material from finished formulations and confirm whether the reported percentage refers to active ingredient content in the technical grade or formulated product.

Quality evaluation may reference HG/T 4924-2016 where applicable. A batch-specific COA can provide corresponding analytical results. Technical powder should be kept in sealed packaging and protected from moisture, direct sunlight, and excessive heat during storage.