Chemical name: o-Hydroxybenzoic acid

Popular name: Salicylic Acid, Liu acid

Molecular Formula: C7H6O3

II. Physical and chemical properties:

Light pink or light brown crystalline powder without the smell, sweet first and the pungent. No chemical change in the air. Below 760C under atmospheric pressure, it can sublimate. After being heated under atmospheric pressure, it’s easy to decarboxylate to be phenol and carbon dioxide. Its aqueous solution appears acid reaction. It turns to purple with FeCI3. It is slightly soluble in water and dissloves in boiling water; it is very soluble in ethanol and ether and slightly dissolved in chloroform.

III. Specifications: （HG/T3398-3003）

Appearance：Light pink or light brown crystalline powder

Salicylic acid content: %≥99.00

Dry product initial melting point: %≥156.0

Phenol content: %≤0.20

Ash: %≤0.30