Pioneering Impurity Solutions
We specialize in the identification, isolation, and synthesis of process-related impurities. Our expertise extends to a wide array of impurities, including isomeric impurities, degradation impurities, metabolites, and glucuronides.
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Product Data
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Technical Data
Chemical Name : Meclizine USP RC A ; 4-Chlorobenzhydrol ;
Smiles : OC(C1=CC=CC=C1)C2=CC=C(Cl)C=C2
Synonym : m-Cinnamanisidide (8CI)
Related Products

Cetirizine Dihydrochloride
CAT No: o2h-C064001
CAS No: 83881-52-1
Mol.F. : C21H25ClN2O3 : 2(HCl)
Mol.Wt. : 388.9 : 2(36.5)

Cetirizine
CAT No: o2h-C064000
CAS No: 83881-51-0
Mol.F. : C21H25ClN2O3
Mol.Wt. : 388.9

Cetirizine EP Impurity C
CAT No: o2h-C064005
CAS No: 83881-59-8
Mol.F. : C21H25ClN2O3
Mol.Wt. : 388.89

Cetirizine EP Impurity B Ethyl Ester
CAT No: o2h-C064004
CAS No: 19178-83-7
Mol.F. : C21H25ClN2O2
Mol.Wt. : 372.89

Cetirizine EP Impurity B
CAT No: o2h-C064003
CAS No: 113740-61-7
Mol.F. : C19H21ClN2O2
Mol.Wt. : 344.8

Cetirizine EP Impurity A
CAT No: o2h-C064002
CAS No: 303-26-4
Mol.F. : C17H19ClN2
Mol.Wt. : 286.8

Cetirizine EP Impurity F
CAT No: o2h-C064008
CAS No: 83881-53-2
Mol.F. : C21H26N2O3
Mol.Wt. : 354.5

Cetirizine EP Impurity E
CAT No: o2h-C064007
CAS No: 682323-77-9
Mol.F. : C23H29ClN2O4
Mol.Wt. : 432.94

Cetirizine EP Impurity D
CAT No: o2h-C064006
CAS No: 346451-15-8
Mol.F. : C30H28Cl2N2
Mol.Wt. : 487.5

Cetirizine USP Related Compound A (2HCl salt)
CAT No: o2h-C064011
CAS No: 2732277-01-7
Mol.F. : C23H29ClN2O3 : 2(HCl)
Mol.Wt. : 416.9 : 2(36.5)

Cetirizine Methyl Ester (USP)
CAT No: o2h-C064010
CAS No: 83881-48-5
Mol.F. : C22H27ClN2O3 : 2HCl
Mol.Wt. : 402.9 : 2(36.5)

Cetirizine EP Impurity G
CAT No: o2h-C064009
CAS No: 164726-80-1
Mol.F. : C19H23ClN2O . 2HCl
Mol.Wt. : 330.86 . 2(36.46)

Cetirizine 3-Chloro Impurity
CAT No: o2h-C064016
CAS No: 1232460-29-5
Mol.F. : C21H25ClN2O3 : 2(HCl)
Mol.Wt. : 388.9 : 2(36.5)

4-Chlorobenzophenone Impurity
CAT No: o2h-C064015
CAS No: 134-85-0
Mol.F. : C13H9ClO
Mol.Wt. : 216.66

Cetirizine USP RC C
CAT No: o2h-C064013
CAS No: 83881-37-2
Mol.F. : C21H26ClN3O2
Mol.Wt. : 387.9

Cetirizine USP RC B
CAT No: o2h-C064012
CAS No: 108983-83-1
Mol.F. : C19H24N2O : 2(HCl)
Mol.Wt. : 296.4 : 2(36.5)

Cetirizine Sorbitol Ester Impurity
CAT No: o2h-C064020
CAS No: 13848888-64-5
Mol.F. : C27H37ClN2O8
Mol.Wt. : 553.04

Cetirizine N-Oxide
CAT No: o2h-C064019
CAS No: 1076199-80-8
Mol.F. : C21H25ClN2O4
Mol.Wt. : 404.89

Cetirizine S-Isomer
CAT No: o2h-C064018
CAS No: 130018-89-2
Mol.F. : C21H25ClN2O3 : HCl
Mol.Wt. : 388.9 : 36.5

Cetirizine R-Isomer
CAT No: o2h-C064017
CAS No: 130018-87-0
Mol.F. : C21H27Cl3N2O3
Mol.Wt. : 461.81

Propylene Glycol Ester of Cetirizine Diastereomer 1
CAT No: o2h-C064023
CAS No: N/A
Mol.F. : C24H31ClN2O4
Mol.Wt. : 447.0

Cetirizine Glycerol Ester
CAT No: o2h-C064022
CAS No: 1243652-36-9
Mol.F. : C24H31ClN2O5
Mol.Wt. : 462.97

Cetirizine Lactose Ester
CAT No: o2h-C064021
CAS No: N/A
Mol.F. : C33H45ClN2O13
Mol.Wt. : 713.2

Cetirizine Polyethylene Glycol
CAT No: o2h-C064025
CAS No: 1509941-93-8
Mol.F. : C21H25ClN2O3(C2H4O)n
Mol.Wt. : 432.9

Propylene Glycol Ester of Cetirizine Diastereomer 2
CAT No: o2h-C064024
CAS No: N/A
Mol.F. : C24H31ClN2O4
Mol.Wt. : 447.0

Cetirizine Glycol Impurity
CAT No: o2h-C064027
CAS No: 324047-29-2
Mol.F. : C23H29ClN2O4
Mol.Wt. : 432.9

Cetirizine Propanediol Ester Impurity
CAT No: o2h-C064026
CAS No: N/A
Mol.F. : C24H31ClN2O4
Mol.Wt. : 447

Cetirizine Impurity 5
CAT No: o2h-C064031
CAS No: N/A
Mol.F. : C21H24Cl2N2O3
Mol.Wt. : 423.3

Cetirizine Impurity 4
CAT No: o2h-C064030
CAS No: N/A
Mol.F. : C38H42Cl2N4O2
Mol.Wt. : 657.7

Cetirizine Impurity 3
CAT No: o2h-C064029
CAS No: 134978-97-5
Mol.F. : C6H13NO4
Mol.Wt. : 163.2

Cetirizine Impurity 2
CAT No: o2h-C064028
CAS No: 1391052-52-0
Mol.F. : C23H23ClN2O2S
Mol.Wt. : 426.96

Cetirizine Impurity 9
CAT No: o2h-C064035
CAS No: N/A
Mol.F. : C25H32ClNO4 : 2HCl
Mol.Wt. : 446 : 2(36.5)

Cetirizine Impurity 8
CAT No: o2h-C064034
CAS No: N/A
Mol.F. : C21H25ClN2O
Mol.Wt. : 356.9

Cetirizine Impurity 7
CAT No: o2h-C064033
CAS No: 82-93-9
Mol.F. : C18H21ClN2
Mol.Wt. : 300.8

Cetirizine Impurity 6
CAT No: o2h-C064032
CAS No: N/A
Mol.F. : C19H20Cl2N2O2
Mol.Wt. : 379.3

(S)-Cetirizine Dihydrochloride
CAT No: o2h-C064039
CAS No: 163837-48-7
Mol.F. : C21H27Cl3N2O3
Mol.Wt. : 461.81

Cetirizine 3-Chloro
CAT No: o2h-C064038
CAS No: 1232460-31-9
Mol.F. : C21H25ClN2O3
Mol.Wt. : 388.89

Cetirizine Impurity 11
CAT No: o2h-C064037
CAS No: 942132-30-1
Mol.F. : C19H22Cl2N2O2
Mol.Wt. : 381.3

Cetirizine Impurity 10
CAT No: o2h-C064036
CAS No: 886886-04-0
Mol.F. : C6H10N4
Mol.Wt. : 138.2

Cetirizine EP Impurity G (HCl)
CAT No: o2h-C064041
CAS No: 728948-88-7
Mol.F. : C19H25Cl3N2O
Mol.Wt. : 403.77

Cetirizine Ethyl Ester
CAT No: o2h-C064040
CAS No: 246870-46-2
Mol.F. : C23H29ClN2O3
Mol.Wt. : 416.94

Cetirizine EP Impurity F Dihydrochloride
CAT No: o2h-C064042
CAS No: 83881-54-3
Mol.F. : C21H28Cl2N2O3
Mol.Wt. : 427.36

Cetirizine Glycol Ester
CAT No: o2h-C064046
CAS No: 2705552-48-1
Mol.F. : C24H31ClN2O4
Mol.Wt. : 446.97

Cetrizine Impurity 16
CAT No: o2h-C064045
CAS No: 70558-10-0
Mol.F. : C17H19ClN2
Mol.Wt. : 286.8

(S)-Cetirizine
CAT No: o2h-C064044
CAS No: 130018-76-7
Mol.F. : C21H25ClN2O3
Mol.Wt. : 388.89

Hydroxyzine Acetic Acid Dihydrochloride
CAT No: o2h-C064043
CAS No: 83881-56-5
Mol.F. : C23H29ClN2O4 • 2 HCl
Mol.Wt. : 505.86

Cetrizine Impurity 18
CAT No: o2h-C064051
CAS No: N/A
Mol.F. : C8H16N2O3
Mol.Wt. : 188.23

CETIRIZINE EP IMPURITY B (Dihydrochloride Salt)
CAT No: o2h-C064050
CAS No: 1000690-91-4
Mol.F. : C19H23Cl3N2O2
Mol.Wt. : 417.76

Cetirizine Hydrochloride
CAT No: o2h-C064049
CAS No: 798544-25-9
Mol.F. : C21H25ClN2O3 : HCl
Mol.Wt. : 388.9 : 36.5

Cetrizine Impurity 17
CAT No: o2h-C064048
CAS No: N/A
Mol.F. : C23H30Cl2N2O2
Mol.Wt. : 437.41

Cetirizine EP Impurity K
CAT No: o2h-C064047
CAS No: N/A
Mol.F. : C25H34N2O3
Mol.Wt. : 410.56