Overview
o-Hydroxybenzohydrazide is a specialized organic compound primarily employed as a building block in chemical synthesis. Its molecular structure combines a hydrazide functional group with a phenolic hydroxyl group, enabling diverse reactivity. The compound is classified as a fine chemical, with production typically meeting pharmaceutical or technical-grade standards. Industrial synthesis involves the reaction of salicyloyl chloride with hydrazine hydrate. Manufacturers often supply it in 25kg fiber drums or custom packaging. Regulatory compliance varies by region; in the EU, it falls under REACH registration requirements.
Physical and Chemical Properties
The compound exhibits characteristic properties of aromatic hydrazides, with the hydroxyl group at the ortho position influencing its chemical behavior. It demonstrates moderate thermal stability, decomposing rather than boiling at elevated temperatures. The crystalline form shows polymorphism in some production batches. Chemically, it acts as a bidentate ligand, forming coordination complexes with transition metals like copper and iron. This chelation property is exploited in analytical chemistry and material science applications. The hydrazide moiety makes it susceptible to oxidation, requiring inert atmosphere storage for long-term preservation.
Main Applications
In pharmaceutical manufacturing, o-hydroxybenzohydrazide serves as a precursor for antibacterial and antifungal agents, particularly in the synthesis of hydrazone derivatives. The agrochemical industry utilizes it in developing plant growth regulators and pesticide formulations. Industrial applications include its use as a metal deactivator in lubricant additives and as a polymerization modifier for specialty plastics. Recent research explores its potential in photodynamic therapy agents and as a fluorescence probe in biochemical assays.
Safety and Storage
As a hydrazide derivative, the compound requires careful handling to prevent exposure to dust or vapors. Safety data sheets classify it as harmful if swallowed or inhaled, with skin irritation potential. Facilities should equip with local exhaust ventilation and chemical-resistant gloves. Long-term storage stability requires protection from moisture and light. Bulk quantities are best stored in polyethylene-lined containers under nitrogen blanket. Incompatible with strong oxidizers and acids; fire hazards include toxic fumes (NOx) during combustion.
B2B Procurement Guide
Industrial buyers should specify required purity levels (typically 98-99%) and particle size distribution when sourcing. Technical grade suffices for most industrial applications, while pharmaceutical-grade commands premium pricing. Key procurement considerations include supplier GMP compliance for regulated uses. Leading manufacturers are concentrated in China and India, with some European specialty chemical producers offering small-volume, high-purity batches. Minimum order quantities commonly range from 100kg to metric ton quantities. Sample testing for heavy metal content and residual solvents is advisable before bulk purchases.
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