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salicylic acid

CAS No.:69-72-7
Molecular Weight: 138.12100 Molecular Formula: C7H6O3


Salicylic acid (from Latin salix, willow tree) is a monohydroxybenzoic acid, a type of phenolic acid and a beta hydroxy acid. It has the formula C7H6O3. This colorless crystalline organic acid is widely used in organic synthesis and functions as a plant hormone. It is derived from the metabolism of salicin. In addition to serving as an important active metabolite of aspirin (acetylsalicylic acid), which acts in part as a prodrug to salicylic acid, it is probably best known for its use as a key ingredient in topical anti-acne products. The salts and esters of salicylic acid are known as salicylates. The medicinal part of the plant is the inner bark. It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.

Basic Info

Chemical Name

salicylic acid


CAS No.:


Molecular Formula:


Molecular Weight:







Appearance:white to off-white crystalline powder
Melting Point:158-161ºC
Boiling Point:211ºC (20 mmHg)
Storage temp:Store at RT.
Vapour:1 mm Hg ( 114 °C)
Refractive Index:1.565
Flash Point:157ºC
Solubility:1.8 g/L (20 ºC)
Stability:Stable. Substances to be avoided include oxidizing agents, strong bases, iodine, fluorine. Combustible. Sensitive to light.

Safety and Handling

Safety Statements:S26-S37/39

HS Code:2918211000

WGK Germany:1

Risk Statements:R22; R36/37/38; R41

Hazard Codes:Xn

Signal Word:Danger

Symbol:GHS05, GHS07

Caution Statement:P280; P301 + P312 + P330; P305 + P351 + P338 + P310

Hazard Declaration:H302; H318

NMR Spectrum