Description

Norbrassinolide (Nbi) is a potent, naturally occurring plant growth regulator belonging to the brassinosteroid class of phytohormones. This compound is highly valued for its ability to significantly enhance crop stress tolerance, yield, and quality at very low application rates. It is an essential input for advanced agricultural formulations, plant biotechnology research, and high-value horticulture. The product is supplied under the identifier CAS No. 77736-43-7.

Application

• Agricultural Biostimulants: A key active ingredient in foliar sprays and seed treatments to improve crop vigor, increase resistance to abiotic stresses (drought, salinity, temperature extremes), and boost overall yield.
• High-Value Horticulture: Used in greenhouse and controlled-environment agriculture to promote fruit setting, improve fruit size and quality, and enhance the post-harvest shelf life of vegetables and fruits.
• Plant Tissue Culture: Employed in micropropagation media to stimulate cell division, elongation, and differentiation for the rapid cloning of elite plant varieties.
• Seed Treatment Formulations: Incorporated into coating technologies to enhance germination rates, seedling establishment, and early root development.
• Turf and Ornamental Management: Applied to improve the density, color, and stress resilience of golf courses, sports fields, and ornamental landscapes.
• Research & Development: Serves as a critical reference standard and biochemical tool for studying brassinosteroid signaling pathways, plant physiology, and the development of novel agrochemicals.

Basic Information

Item	Detail
Product Name	Norbrassinolide (Nbi)
CAS No.	77736-43-7
Molecular Formula	C₂₈H₄₈O₆
Molecular Weight	480.68 g/mol
Synonyms	NBI; 2α,3α,22α,23α-Tetrahydroxy-24α-methyl-B-homo-7-oxa-5α-cholestan-6-one; 24-Epibrassinolide; (22R,23R,24R)-2α,3α,22,23-Tetrahydroxy-24-methyl-B-homo-7-oxa-5α-cholestan-6-one; Brassinolide analog; Plant growth brassinosteroid
EINECS	Contact for details

Quality Control

Our Norbrassinolide is manufactured under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including HPLC for purity verification and spectroscopic methods for structural confirmation, to ensure it meets stringent specifications for agrochemical and research use. A Certificate of Analysis (COA) detailing purity, identity, and related substances is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C. This product is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.