Ketotifen fumarate

Also known as: Ketotifen fumarate [USAN:JAN], Zaditen, Zaditor, Alaway, HC 20,511 fumarate, Ketotifen hydrogen fumarate, 4,9-Dihydro-4-(1-methyl-4-piperidylidene)-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one fumarate, 4-(1-Methylpiperidin-4-ylidene)-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one (2E)-but-2-enedioate (1:1), 4-(1-methylpiperidin-4-ylidene)-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one (2E)-but-2-enedioate, Ketotifene fumarate, UNII:HBD503WORO, EINECS 252-100-0, acide (2E)-but-2-ènedioïque - 4-(1-méthylpipéridin-4-ylidène)-4,9-dihydro-10H-benzo[4,5]cyclohepta[1,2-b]thiophén-10-one (1:1)

Ketotifen fumarate (CAS 34580-14-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C23H23NO5S and a molecular weight of 425.497 g/mol. Key properties include a melting point of -43°C, a boiling point of 250-263 °C(lit.), a density of 0.968 g/mL at 25 °C(lit.) and a flash point of 96-98°C/5mm. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

34580-14-8

Jingsj CID

J-37898-5

Molecular Formula

C₂₃H₂₃NO₅S

Molecular Weight

425.497 g/mol

Category

Organic Acids

Last updated

8/21/2026