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.
Specification:
|
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 |
|
