Aspirin

CAS 50-78-2C9H8O4180.16 g/mol

Acetylsalicylic acid is a member of the class of benzoic acids that is salicylic acid in which the hydrogen that is attached to the phenolic hydroxy group has been replaced by an acetoxy group. A non-steroidal anti-inflammatory drug with cyclooxygenase inhibitor activity. It has a role as a geroprotector, a non-steroidal anti-inflammatory drug, a non-narcotic analgesic, an antipyretic, a prostaglandin antagonist, an anticoagulant, a platelet aggregation inhibitor, a cyclooxygenase 2 inhibitor, a cyclooxygenase 1 inhibitor, a teratogenic agent, a plant activator, an EC 1.1.1.188 (prostaglandin-F synthase) inhibitor and a drug allergen. It is a member of phenyl acetates, a member of benzoic acids and a member of salicylates. It is functionally related to a salicylic acid. It is a conjugate acid of an acetylsalicylate.

IUPAC: 2-acetyloxybenzoic acid

PubChem

Physical & Chemical Properties

Physical and chemical properties
Melting Point	275 °F (NTP, 1992)
Boiling Point	284 °F at 760 mmHg (decomposes) (NTP, 1992)
Density	1.4 (NTP, 1992) - Denser than water; will sink
Solubility	less than 1 mg/mL at 73 °F (NTP, 1992)
Flash Point	482 °F (NTP, 1992)
Vapor Pressure	0 mmHg (approx) (NIOSH, 2024)
Appearance	Acetylsalicylic acid appears as odorless white crystals or crystalline powder with a slightly bitter taste. (NTP, 1992)