Cetirizine-d4
CAS No. 83881-52-1 (non-d)
C21H21ClN2O3D4.2HCl
M.W. 392.92 2x36.46

Cetirizine EP Impurity C
CAS No. 83881-59-8
C21H25ClN2O3
M.W. 388.89

Cetirizine EP Impurity E
CAS No. 682323-77-9
C23H29ClN2O4
M.W. 432.95

Cetirizine EP Impurity G
CAS No. 109806-71-5
C19H23ClN2O
M.W. 330.86

Cetirizine Impurity 6
CAS No. NA
C11H14Cl2O2S
M.W. 281.20

Cetirizine Impurity 7
CAS No. NA
C23H23ClN2O2S
M.W. 426.97

Cetirizine Impurity 8 DiHCl
CAS No. 200707-85-3
C21H26ClN3O2. 2HCl
M.W. 387.91 2 36.46

Cetirizine Impurity 18 (4-Chlorobenzophenone)
CAS No. 134-85-0
C13H9ClO
M.W. 216.66

Cetirizine EP Impurity F
CAS No. 83881-53-2
C21H26N2O3
M.W. 354.45

Cetirizine Methyl Ester HCl
C22H27ClN2O3. HCl
M.W. 402.93 36.46

(S)-Cetirizine DiHCl (Levocetirizine S-Isomer DiHCl)
CAS No. 163837-48-7
C21H25ClN2O3. 2 HCl
M.W. 388.89 2 36.46

4-Chloro Benzhydrol (Meclozine EP Impurity B)
CAS No. 119-56-2
C13H11ClO
M.W. 218.69

Cetirizine EP Impurity D
CAS No. 346451-15-8
C30H28Cl2N2
M.W. 487.47

Cetirizine Impurity 19 DiHCl
CAS No. 108983-83-1
C19H24N2O. 2 HCl
M.W. 296.41 2*36.46

Cetirizine Impurity 10
C24H31ClN2O4
M.W. 446.98

Cetirizine 3-Chloro Impurity
CAS No. 1232460-31-9
C21H25ClN2O3
M.W. 388.89

(R)-Cetirizine N1-Oxide DiHCl
CAS No. 442863-80-1 (free base)
C21H25ClN2O4. 2 HCl
M.W. 404.89 2 36.46

(R)-Cetirizine Polyethylene Glycol Ester (Mixture of Isomers)
CAS No. 1509941-93-8 (racemic)
C21H25ClN2O3 [C2H4O]n
M.W. 388.90*[44.05]n

Cetirizine N,N-Dioxide DiHCl
C21H25ClN2O5. 2 HCl
M.W. 420.90 2 36.46

Cetirizine Sorbitol Ester Impurity HCl (Mixture of Diastereomers)
C27H37ClN2O8. HCl
M.W. 553.06 36.46

Cetirizine Impurity Y
C12H15NO6S
M.W. 301.32

Cetirizine 6'-O-Lactose Ester HCl (Mixture of alpha and beta Isomers HCl)
C33H45ClN2O13. HCl
M.W. 713.17 36.46
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