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Acetylsalicylic acid

Clinical data
Other names	2-acetyloxybenzoic acid acetylsalicylate acetylsalicylic acid O-acetylsalicylic acid
Pregnancy category	AU: C
Routes of administration	Most commonly oral, also rectal. Lysine acetylsalicylate may be given IV or IM
ATC code	A01AD05 (WHO) B01AC06 (WHO), N02BA01 (WHO)
Legal status
Legal status	AU: Unscheduled UK: General sales list (GSL, OTC) US: OTC
Pharmacokinetic data
Bioavailability	Rapidly and completely absorbed
Protein binding	99.6%
Metabolism	Hepatic
Elimination half-life	300–650 mg dose: 3.1–3.2 h 1 g dose: 5 h 2 g dose: 9 h
Excretion	Renal
Identifiers
IUPAC name 2-acetoxybenzoic acid
CAS Number	50-78-2
PubChem CID	2244
DrugBank	DB00945
ChemSpider	2157 Y
UNII	R16CO5Y76E
KEGG	D00109 Y
ChEBI	CHEBI:116450
ChEMBL	ChEMBL25 Y
Chemical and physical data
Formula	C9H8O4
Molar mass	180.157 g/mol g·mol−1
3D model (JSmol)	Interactive image
Density	1.40 g/cm3
Melting point	135 °C (275 °F)
Boiling point	140 °C (284 °F) (decomposes)
Solubility in water	3 mg/mL (20 °C)
SMILES O=C(Oc1ccccc1C(=O)O)C
InChI InChI=1S/C9H8O4/c1-6(10)13-8-5-3-2-4-7(8)9(11)12/h2-5H,1H3,(H,11,12) Y Key:BSYNRYMUTXBXSQ-UHFFFAOYSA-N Y
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