Astemizole is rapidly absorbed from the gastrointestinal tract and competitively binds to histamine H1 receptor sites in the gastrointestinal tract, uterus, blood vessels, and bronchial muscle. It is a histamine H1-receptor antagonist. It has anticholinergic and antipruritic effects.. Reference standards of Astemizole API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below
Astemizole
Catalogue No.:PA 01 81000
CAS :
Molecular Formula : C28H31FN4O
Molecular Weight : 458.57
O-Desmethyl Astemizole
Catalogue No.:PA 01 81510
Molecular Formula : C27H29FN4O
Molecular Weight : 444.54
N-Ethoxycarbonyl Norastemizole
Catalogue No.:PA 01 81520
Molecular Formula : C22H25FN4O2
Molecular Weight : 396.46
Astemizole-d3
Catalogue No.:PA STI 009120
Molecular Formula : C28H28D3FN4O
Molecular Weight : 461.59
Astemizole (1044301)
Catalogue No.:PA USP1044301
Molecular Formula : NA
Molecular Weight : NA
Norastemizole Hydrobromide
Catalogue No.:PA 01 81530
Molecular Formula : C19H23Br2FN4
Molecular Weight : 486.22
O-Desmethyl Astemizole-d5
Catalogue No.:PA STI 089308
Molecular Formula : C27H24D5FN4O
Molecular Weight : 449.58
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