Benzyl Alcohol is an important aromatic alcohol widely used in medicine, daily chemicals, food, chemical industry and other fields. The following is a detailed introduction: I. Basic Information Molecular Formula: () Molecular Weight: 108.14 CAS No.: 100-51-6 Appearance and Odor: Colorless transparent liquid with a faint, pleasant aromatic odor Solubility: Slightly soluble in water (approximately 4.29 g/100 mL at 25℃), readily soluble in organic solvents such as ethanol, ether, acetone and benzene II. Physicochemical Properties

III. Chemical Properties Benzyl alcohol is chemically reactive and mainly undergoes the following reactions: Oxidation Reaction: It is easily oxidized and slowly oxidizes in air to form benzaldehyde, which further oxidizes to benzoic acid. Esterification Reaction: It reacts with organic or inorganic acids to form esters, serving as an important raw material for esterification. Halogenation Reaction: It reacts with hydrohalic acids and phosphorus halides to form benzyl halides, which are common benzylation reagents. Dehydration Reaction: It dehydrates under acid catalysis to form dibenzyl ether. IV. Main Applications Medical Field Local Anesthetic: Used to relieve pain during injection. Preservative: Used for bacteriostasis and preservation of injections and ophthalmic preparations. Treatment of Head Lice: Topical treatment for head lice infection in patients aged 6 months and above. Daily Chemical Field Fragrance: Used in blending essences for soaps, cosmetics and perfumes. Solvent: Used in nail polishes, hair dyes, skin care products and other products. Preservative: Inhibits bacteria and extends the shelf life of cosmetics. Food Field Food Additive (E1519): Used as a food preservative, flavoring agent and solvent. Industrial Field Solvent: Used in coatings, inks, epoxy resins, cellulose esters, etc. Organic Synthesis Intermediate: Used in the preparation of benzyl esters, benzyl ethers, dyes, plastics, etc. V. Safety and Precautions Toxicity: Low toxicity, but high concentration or long-term exposure may cause skin irritation, allergies and respiratory discomfort. Contraindications: Prohibited for intramuscular injection in newborns, which may cause fatal "gasping syndrome". Storage: Store sealed in a cool, dry place, away from fire sources.