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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 1-[(4-Chlorophenyl)phenylmethyl]piperazine Amide-... Stable Isotopes CS-T-100673 Not Available Enquire
Cetirizine-​d8 dihydrochloride Stable Isotopes CS-T-95941 2070015-04-0 Enquire
Cetirizine-d8 Stable Isotopes CS-O-03058 774596-22-4 In Stock
N-Nitroso Cetirizine EP Impurity A-d8 Stable Isotopes CS-O-47314 2005-04-1 (Unlabelled) In Stock
2-[4-[(4-Chlorophenyl)phenylmethyl]-1-piperazinyl]ethanol-d4 Stable Isotopes CS-T-72698 1794756-21-0 Enquire
Cetirizine D4 Stable Isotopes CS-O-01307 1219803-84-5 Enquire
rac Cetirizine-d8 N-Oxide Stable Isotopes CS-T-70191 1216444-13-1 Enquire


API

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


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine Methyl Ester Metabolite CS-O-06030 83881-46-3 In Stock
Cetirizine N-Oxide Metabolite CS-O-05852 1076199-80-8 In Stock
Levocetirizine N-Oxide Metabolite CS-O-05918 442863-80-1 In Stock
Deschloro Cetirizine Metabolite CS-P-07457 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-De(carboxymethoxy) Cetirizine Acetic Acid Hydrochloride Impurity CS-T-14603 942132-30-1 In Stock
2-[2-(1-Piperazinyl)ethoxy]acetic acid Impurity CS-O-48618 197969-01-0 Enquire
2-hydroxyethanone Cetirizine Impurity Impurity CS-O-43075 Not Available Enquire
2-oxo Cetirizine Impurity Impurity CS-O-43074 Not Available Enquire
4-Benzhydryl-1-piperazineethanol Dihydrochloride Impurity CS-T-48648 108983-83-1 Enquire
4-oxo Cetirizine Impurity Impurity CS-O-43076 Not Available Enquire
Cetirizine 1-​[(4-​Chlorophenyl)​phenylmethyl]​piperazine Am... Impurity CS-O-40876 2724877-99-8 Enquire
Cetirizine 2-oxoethoxy-acetic acid impurity Impurity CS-O-55191 1172851-76-1 Enquire
Cetirizine 3-Chloro Impurity Impurity CS-O-07594 1232460-29-5 In Stock
Cetirizine Amide Impurity CS-T-10979 83881-37-2 In Stock
Cetirizine Dimer dihydrochloride Impurity CS-BX-00962 856841-95-7 In Stock
Cetirizine EP Impurity A Impurity CS-O-31588 303-26-4 In Stock
Cetirizine EP impurity B Impurity CS-T-14604 113740-61-7 In Stock
Cetirizine EP Impurity C Impurity CS-O-60514 83881-59-8 Enquire
Cetirizine EP Impurity C Dihydrochloride Impurity CS-O-07601 2702511-37-1 In Stock
Cetirizine EP Impurity D Impurity CS-DH-00032 346451-15-8 In Stock
Cetirizine EP Impurity D Dihydrochloride Impurity CS-O-07602 856841-95-7 In Stock
Cetirizine EP Impurity E Impurity CS-CB-00053 682323-77-9 In Stock
Cetirizine EP Impurity E DiHydrochloride Impurity CS-O-07603 83881-56-5 In Stock
Cetirizine EP Impurity F Impurity CS-O-07604 83881-53-2 In Stock
Cetirizine EP Impurity G Dihydrochloride Impurity CS-O-07605 164726-80-1 In Stock
Cetirizine EP Impurity G Monohydrochloride Impurity CS-T-72963 1177093-13-8 In Stock
Cetirizine Glycerol Ester Impurity CS-T-10966 1243652-36-9 In Stock
Cetirizine Glycerol Ester Impurity Hydrochloride Impurity CS-P-07459 1243652-36-9 (free base) In Stock
Cetirizine Impurity 7 Impurity CS-EO-03412 82-93-9 Enquire
Cetirizine impurity B di Hydrochloride Impurity CS-O-15936 1000690-91-4 In Stock
Cetirizine Impurity G Impurity CS-O-30391 728948-88-7 In Stock
Cetirizine Lactose Ester (Technical Grade) (α/β-mixture, mix... Impurity CS-T-93655 ---- In Stock
Cetirizine Lactose Ester Hydrochloride Salt Impurity CS-P-03772 ---- Enquire
Cetirizine Methyl Ester Dihydrochloride Impurity CS-T-69222 83881-48-5 In Stock
Cetirizine Propanediol Ester Impurity Dihydrochloride Impurity CS-P-08606 ---- Enquire
Cetirizine Propionic Acid Impurity CS-O-58231 ---- Enquire
Cetirizine Propyl Impurity Impurity CS-O-58229 301685-30-3 Enquire
Cetirizine Related Compound A Impurity CS-O-07610 246870-46-2(base) In Stock
Cetirizine S-Isomer Impurity CS-EO-03411 130018-89-2 Enquire
Cetirizine S-Isomer di HCl Impurity CS-O-07609 163837-48-7 In Stock
Cetirizine Sorbitol Ester Impurity Hydrochloride Impurity CS-P-07464 1384888-64-5 (free base) In Stock
Cetirizine USP Related Compund A (2HCl salt) Impurity CS-EO-03410 2732277-01-7 Enquire
Deschloro Cetirizine Dihydrochloride Impurity CS-T-73775 83881-54-3 In Stock
Levocetirizine Dihydrochloride - Impurity E Impurity CS-O-45961 ---- Enquire
Levocetirizine EP Impurity C Dihydrochloride Impurity CS-O-16047 2702511-37-1 In Stock
Levocetirizine Ethyl ester impurity Impurity CS-O-38317 1116338-10-3 In Stock
Levocetirizine Impurity 1 Impurity CS-P-05076 1150310-68-1 In Stock
Levocetirizine Impurity 4 Impurity CS-O-45962 ---- Enquire
Levocetirizine Impurity G Impurity CS-CK-00002 109806-71-5 In Stock
Levocetirizine Lactose ester-1 Impurity CS-EO-00656 ---- Enquire
Levocetirizine Lactose ester-2 Impurity CS-O-57058 ---- Enquire
Levocetirizine N,N-Acetic acid Di HCl salt Impurity CS-O-48818 Not Available In Stock
Levocetirizine N,N-Acetic acid impurity Impurity CS-O-48817 Not Available In Stock
Levocetirizine N,N-Diethy acetate impurity Impurity CS-O-48816 Not Available In Stock
N-Tosyl Cetirizine EP impurity A Impurity CS-O-52685 474654-20-1 Enquire
Racemic Cetirizine Dihydrochloride Impurity CS-O-34447 ---- In Stock
(-)-2-(4-((4-Chlorophenyl) Phenyl Methyl) Piperazin-lyl] eth... Impurity CS-O-42089 705289-61-8 Enquire
(-)-2[2-[ 4-[( 4-chlorophenyl) phenyl methyl]-1-piperazinyl]... Impurity CS-O-42090 Not Available Enquire
(R)-Cetirizine N-Oxide DiHydrochloride Impurity CS-P-07460 442863-80-1 (free base) Enquire
(R)-De(carboxymethoxy) Cetirizine Acetic Acid Impurity CS-T-73150 942193-17-1 Enquire
Cetirizine 3-Chloro Impurity CS-O-38334 1232460-31-9 Enquire
Cetirizine Amide Dihydrochloride Impurity CS-T-10980 200707-85-3 Enquire
Cetirizine EP Impurity B Ethyl Ester Impurity CS-O-07600 19178-83-7 Enquire
Cetirizine Impurity BHA Impurity CS-DN-00043 Not Available Enquire
Cetirizine Impurity BHT Impurity CS-DN-00001 Not Available Enquire
Cetirizine Impurity E Sodium Salt Impurity CS-P-07456 682323-77-9 (free base) Enquire
Cetirizine Polyethylene Glycol (PEG) Ester Impurity CS-T-50496 1509941-93-8 Enquire
Levocetirizine benzyl Impurity CS-O-38278 Not Available Enquire
tert-Butyl Cetirizine Impurity CS-T-09309 335017-46-4 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-(2-(2-Aminoethoxy)ethoxy)acetic acid Intermediate CS-DV-01048 134978-97-5 In Stock
Cetirizine Ethyl Ester Intermediate CS-T-10981 246870-46-2 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Chlorobenzhydrol Fine Chemicals CS-O-07595 119-56-2 In Stock
Levocetirizine Amide Fine Chemicals CS-T-93599 909779-33-5 In Stock


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(4-chlorophenyl)-4-nitrosopiperazine Nitrosamine CS-O-53192 873395-52-9 In Stock
N-Nitroso 1-(3-Chlorobenzhydryl) piperazine Nitrosamine CS-BX-02746 1706351-82-7 In Stock


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine dihydrochloride Secondary Standards CS-SS-24019 83881-52-1 Enquire
Cetirizine dihydrochloride Secondary Standards CS-SS-24019-250MG 83881-52-1 Enquire
Cetirizine dihydrochloride Secondary Standards CS-SS-24019-1GM 83881-52-1 Enquire
Cetirizine hydrochloride Related Compound A Secondary Standards CS-SS-24662-40MG 246870-46-2 Enquire
Cetirizine Related Compound B Secondary Standards CS-SS-25967-40MG 108983-83-1 Enquire
Cetirizine Related Compound C Secondary Standards CS-SS-26198-50MG 83881-37-2 Enquire
Cetirizine Related Compound G Secondary Standards CS-SS-25602-100MG 164726-80-1 Enquire
Levocetirizine Amide Secondary Standards CS-SS-26252-150MG 909779-33-5 Enquire
Levocetirizine Dihydrochloride Secondary Standards CS-SS-25891-500MG 130018-87-0 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(S)-(4-Chlorophenyl)(phenyl)methanamine Building Blocks CS-ED-41740 163837-32-9 Enquire


Chiral

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Dextro Cetirizine Hydrochloride Chiral CS-O-05743 163837-48-7 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cetirizine dihydrochloride(C0980650) EP Standards CS-EG-03285 83881-52-1 In Stock


Therapeutic

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Levocetirizine-d4 Dihydrochloride Therapeutic CS-O-14652 130018-87-0(Unlabeled) In Stock