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Ketotifen free base

CAS No.   34580-13-7

Chemical Name:     9,10-dihydro-4H-benzo [4,5] cycloheptane-[1,2-a] thienyl -10 ketone-4--ketone

Molecular formula:    C19H19NOS

Structure formula:


Application:     Used for the synthesis of antihistamines ketotifen, treatment and prevention of allergic asthma.


Analysis Items Standard
Apperance yellow crystal powder
Assay(HPLC) 98.5% min
Melting point 152-157ºC
Related substances 1.0% max
Ignition residue 0.1% max
Loss on drying 0.5% max

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