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.

| Item | Specification |
|---|---|
| Product Name | Brassinolide |
| Product Category | Plant growth regulator |
| Technical Material | Crystalline powder |
| Technical Material Appearance | White crystalline powder |
| Technical Grade | 90%–95% |
| Formulated Grades | 0.01%, 0.1% |
| Formulation Types | Soluble liquid, soluble powder, emulsifiable concentrate |
| Liquid Appearance | Colorless to pale yellow transparent liquid |
| Powder Formulation Appearance | Off-white powder |
| Main Assay Method | HPLC |
| Additional Testing | pH, heat-storage stability |
| Applications | Foliar products, fertigation, fertilizer blends |
| Reference Standard | HG/T 4924-2016 |
| Documentation | COA available |
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:
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.

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.
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:
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.
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