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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Cetirizine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Cetirizine impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Cetirizine-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Cetirizine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine D4 Stable Isotopes CS-O-01307 1219803-84-5 Enquire
Cetirizine-d8 Stable Isotopes CS-O-03058 774596-22-4 In Stock
Levocetirizine-d4 Stable Isotopes CS-O-02878 1133210-23-7 In Stock
Levocetirizine-d4 Dihydrochloride Stable Isotopes CS-O-14652 130018-87-0(Unlabeled) In Stock
N-Nitroso Cetirizine EP Impurity A-d8 Stable Isotopes CS-O-47314 2005-04-1 (Unlabelled) In Stock
rac Cetirizine-d8 N-Oxide Stable Isotopes CS-T-70191 1216444-13-1 Enquire
tert-Butyl Cetirizine-d8 Stable Isotopes CS-T-101763 1189466-71-4 Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine API Standards CS-ZE-16581 83881-51-0 Enquire
Cetirizine Dihydrochloride API Standards CS-O-34340 83881-52-1 In Stock
Cetirizine hydrochloride API Standards CS-O-01088 798544-25-9 In Stock
Levocetirizine API Standards CS-O-05742 130018-77-8 In Stock
Levocetirizine Dihydrochloride API Standards CS-O-01775 130018-87-0 In Stock
Levocetirizine Hydrochloride API Standards CS-O-44413 823178-28-5 In Stock
LEVOCETIRIZINE RACEMIC MIXTURE IMPURITY API Standards CS-O-44451 83881-51-0 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine Methyl Ester Metabolites CS-O-06030 83881-46-3 In Stock
Cetirizine N-Oxide Metabolites CS-O-05852 1076199-80-8 In Stock
Levocetirizine N-Oxide Metabolites CS-O-05918 442863-80-1 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(-)-2-(4-((4-Chlorophenyl) Phenyl Methyl) Piperazin-lyl] eth... Impurities CS-O-42089 705289-61-8 Enquire
(R)-Cetirizine N-Oxide DiHydrochloride Impurities CS-P-07460 442863-80-1 (free base) Enquire
(R)-De(carboxymethoxy) Cetirizine Acetic Acid Impurities CS-T-73150 942193-17-1 Enquire
(R)-De(carboxymethoxy) Cetirizine Acetic Acid Hydrochloride Impurities CS-T-14603 942132-30-1 In Stock
2-[2-(1-Piperazinyl)ethoxy]acetic acid Impurities CS-O-48618 197969-01-0 Enquire
2-hydroxyethanone Cetirizine Impurity Impurities CS-O-43075 Not Available Enquire
2-oxo Cetirizine Impurity Impurities CS-O-43074 Not Available Enquire
4-Benzhydryl-1-piperazineethanol Dihydrochloride Impurities CS-T-48648 108983-83-1 Enquire
4-oxo Cetirizine Impurity Impurities CS-O-43076 Not Available Enquire
Cetirizine 1-​[(4-​Chlorophenyl)​phenylmethyl]​piperazine Am... Impurities CS-O-40876 2724877-99-8 Enquire
Cetirizine 2-oxoethoxy-acetic acid impurity Impurities CS-O-55191 1172851-76-1 Enquire
Cetirizine 3-Chloro Impurities CS-O-38334 1232460-31-9 Enquire
Cetirizine 3-Chloro Impurity Impurities CS-O-07594 1232460-29-5 In Stock
Cetirizine Amide Impurities CS-T-10979 83881-37-2 In Stock
Cetirizine Amide Dihydrochloride Impurities CS-T-10980 200707-85-3 Enquire
Cetirizine Dimer dihydrochloride Impurities CS-BX-00962 856841-95-7 In Stock
Cetirizine EP Impurity A Impurities CS-O-31588 303-26-4 In Stock
Cetirizine EP impurity B Impurities CS-T-14604 113740-61-7 In Stock
Cetirizine EP Impurity B Ethyl Ester Impurities CS-O-07600 19178-83-7 Enquire
Cetirizine EP Impurity C Dihydrochloride Impurities CS-O-07601 2702511-37-1 In Stock
Cetirizine EP Impurity D Impurities CS-DH-00032 346451-15-8 In Stock
Cetirizine EP Impurity D Dihydrochloride Impurities CS-O-07602 856841-95-7 In Stock
Cetirizine EP Impurity E Impurities CS-CB-00053 682323-77-9 In Stock
Cetirizine EP Impurity E Impurities CS-T-28992 682323-77-9 Enquire
Cetirizine EP Impurity E DiHydrochloride Impurities CS-O-07603 83881-56-5 In Stock
Cetirizine EP Impurity F Impurities CS-O-07604 83881-53-2 In Stock
Cetirizine EP Impurity G Dihydrochloride Impurities CS-O-07605 164726-80-1 In Stock
Cetirizine EP Impurity G Monohydrochloride Impurities CS-T-72963 1177093-13-8 In Stock
Cetirizine Glycerol Ester Impurities CS-T-10966 1243652-36-9 In Stock
Cetirizine Glycerol Ester Impurity Hydrochloride Impurities CS-P-07459 1243652-36-9 (free base) In Stock
Cetirizine Impurity 7 Impurities CS-EO-03412 82-93-9 Enquire
Cetirizine impurity B di Hydrochloride Impurities CS-O-15936 1000690-91-4 In Stock
Cetirizine Impurity BHA Impurities CS-DN-00043 Not Available Enquire
Cetirizine Impurity BHT Impurities CS-DN-00001 Not Available Enquire
Cetirizine Impurity E Sodium Salt Impurities CS-P-07456 682323-77-9 (free base) Enquire
Cetirizine Impurity G Impurities CS-O-30391 728948-88-7 In Stock
Cetirizine Lactose Ester (Technical Grade) (α/β-mixture, mix... Impurities CS-T-93655 Not Available In Stock
Cetirizine Lactose Ester Hydrochloride Salt Impurities CS-P-03772 Not Available In Stock
Cetirizine Methyl Ester Dihydrochloride Impurities CS-T-69222 83881-48-5 In Stock
Cetirizine Polyethylene Glycol (PEG) Ester Impurities CS-T-50496 1509941-93-8 Enquire
Cetirizine Propanediol Ester Impurity Dihydrochloride Impurities CS-P-08606 Not Available Enquire
Cetirizine Propionic Acid Impurities CS-O-58231 Not Available Enquire
Cetirizine Propyl Impurity Impurities CS-O-58229 301685-30-3 Enquire
Cetirizine Related Compound A Impurities CS-O-07610 246870-46-2(base) In Stock
Cetirizine S-Isomer Impurities CS-EO-03411 130018-89-2 Enquire
Cetirizine S-Isomer di HCl Impurities CS-O-07609 163837-48-7 In Stock
Cetirizine Sorbitol Ester Impurity Hydrochloride Impurities CS-P-07464 1384888-64-5 (free base) In Stock
Cetirizine USP Related Compund A (2HCl salt) Impurities CS-EO-03410 2732277-01-7 Enquire
Deschloro Cetirizine Dihydrochloride Impurities CS-T-73775 83881-54-3 In Stock
Levocetirizine benzyl Impurities CS-O-38278 Not Available Enquire
Levocetirizine Dihydrochloride - Impurity E Impurities CS-O-45961 Not Available Enquire
Levocetirizine EP Impurity C Dihydrochloride Impurities CS-O-16047 2702511-37-1 In Stock
Levocetirizine Ethyl ester impurity Impurities CS-O-38317 1116338-10-3 In Stock
Levocetirizine Impurity 1 Impurities CS-P-05076 1150310-68-1 In Stock
Levocetirizine Impurity 4 Impurities CS-O-45962 Not Available Enquire
Levocetirizine Impurity G Impurities CS-CK-00002 109806-71-5 In Stock
Levocetirizine Lactose ester-1 Impurities CS-EO-00656 Not Available Enquire
Levocetirizine Lactose ester-2 Impurities CS-O-57058 Not Available Enquire
Levocetirizine N,N-Acetic acid Di HCl salt Impurities CS-O-48818 Not Available In Stock
Levocetirizine N,N-Acetic acid impurity Impurities CS-O-48817 Not Available In Stock
Levocetirizine N,N-Diethy acetate impurity Impurities CS-O-48816 Not Available In Stock
N-Tosyl Cetirizine EP impurity A Impurities CS-O-52685 474654-20-1 Enquire
Racemic Cetirizine Dihydrochloride Impurities CS-O-34447 Not Available In Stock
tert-Butyl Cetirizine Impurities CS-T-09309 335017-46-4 Enquire


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine for peak identification (Y0001197) EP Standards CS-EG-00307 83881-52-1 In Stock
Cetirizine impurity A (C0980651) EP Standards CS-EG-00306 303-26-4 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine Dihydrochloride Intermediates CS-O-07597 83881-52-1 Enquire
Cetirizine Ethyl Ester Intermediates CS-T-10981 246870-46-2 In Stock
Cetirizine-​d8 dihydrochloride Intermediates CS-T-95941 2070015-04-0 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Chlorobenzhydrol Fine Chemicals CS-O-07595 119-56-2 In Stock