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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Chloroquine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Chloroquine 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 Chloroquine-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.

Chloroquine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-(-)-Hydroxy Chloroquine-d4 Diphosphate Stable Isotopes CS-T-97448 158749-75-8(Unlabelled) Enquire
(R)-(-)-Hydroxy Chloroquine-d5 Diphosphate Stable Isotopes CS-T-97447 Not Available Enquire
(S)-(+)-Hydroxy Chloroquine-d4 Diphosphate Stable Isotopes CS-T-97446 Not Available Enquire
(S)-(+)-Hydroxy Chloroquine-d5 Diphosphate Stable Isotopes CS-T-97445 158749-76-9(Unlabelled) Enquire
Chloroquine d5 Stable Isotopes CS-O-47498 Not Available Enquire
Chloroquine D5 Diphosphate Stable Isotopes CS-O-13033 1854126-42-3 Enquire
Hydroxy Chloroquine-d4 Sulfate Stable Isotopes CS-O-02972 1216432-56-2 In Stock
HYDROXYCHLOROQUINE DIOXALATE SALT Stable Isotopes CS-SN-00042 118-42-3(free base) Enquire
Hydroxychloroquine Sulphate D3 Stable Isotopes CS-O-39677 Not Available Enquire
Hydroxychloroquine-d4 Stable Isotopes CS-EO-02368 1216432-55-1 Enquire
Hydroxychloroquine-D4 (ethan-1,1,2,2-d4-1-ol) Sulfate Stable Isotopes CS-O-35300 1854126-45-6 Enquire
Hydroxychloroquine-d4 O-Sulfate Stable Isotopes CS-T-99222 Not Available Enquire
N-Didestethyl Chloroquine-d4 Phthalimide Stable Isotopes CS-EO-02535 Not Available Enquire
Chloroquine D4 Stable Isotopes CS-O-35677 1246815-14-4 Enquire
Chloroquine diphosphate salt D10 Stable Isotopes CS-CX-00227 1261396-19-3 Enquire
Chloroquine-d4 Phosphate Salt Stable Isotopes CS-T-93834 1246815-14-4 In Stock
Desethyl Chloroquine D4 Stable Isotopes CS-T-52089 1189971-72-9 Enquire
Desethyl chloroquine-D5 diphosphate salt Stable Isotopes CS-O-14936 1261397-17-4 Enquire
Desethyl hydroxychloroquine-d4 Stable Isotopes CS-O-37600 1854126-47-8 Enquire
Desethylchloroquine diphosphate salt 13C6 Stable Isotopes CS-EK-00086 247912-76-1 unlabeled Enquire
Desethylchloroquine-D5 Stable Isotopes CS-O-14940 1261392-69-1 Enquire
Didesethyl Chloroquine D4 Stable Isotopes CS-T-52738 1215797-41-3 Enquire
Didesethyl Chloroquine Hydroxyacetamide-d4 Stable Isotopes CS-T-52740 1216956-86-3 Enquire
Hydroxychloroquine-D4 O-Sulfate Sodium Salt Stable Isotopes CS-O-34967 103152-84-7 (free base, Unlabeled) Enquire
Hydroxychloroquine-D5 sulfate Stable Isotopes CS-O-14939 747-36-4 Unlabeled Enquire
N-Acetyl Desethyl Chloroquine-d4 Stable Isotopes CS-T-64576 1216619-20-3 Enquire
R-Hydroxychloroquine-d4 Stable Isotopes CS-O-13036 137433-23-9(Unlabeld) Enquire
S-Hydroxychloroquine-d4 Stable Isotopes CS-O-13034 137433-24-0(Unlabeled) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Chloroquine API CS-CX-00225 54-05-7 In Stock
Chloroquine diphosphate API CS-O-06225 50-63-5 In Stock
Chloroquine Diphosphate Hydrate API CS-EO-03418 29791-25-1 Enquire
Chloroquine Sulfate API CS-O-01092 132-73-0 In Stock
Hydroxychloroquine API CS-O-15317 118-42-3 In Stock
Hydroxychloroquine sulphate API CS-O-01630 747-36-4 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Chloroquine analog Metabolite CS-CX-00226 85-10-9 Enquire
Chloroquine Dihydrochloride Metabolite CS-O-13032 3545-67-3 Enquire
Desethylchloroquine diphosphate salt Metabolite CS-EK-00177 247912-76-1 Enquire
Didesethyl Chloroquine Metabolite CS-T-17957 4298-14-0 Enquire
Hydroxychloroquine O-Sulfate Sodium Salt Metabolite CS-T-93694 103152-84-7 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Chloroquine N-oxide Impurity CS-O-56718 68121-48-2 Enquire
de-ethylhydroxychloroquine sulphate Impurity CS-O-47358 Not Available Enquire
Hydroxychloroquine Dimer Impurity CS-O-35932 2732209-42-4 Enquire
Hydroxychloroquine EP Impurity C Impurity CS-T-13091 4298-15-1 In Stock
Hydroxychloroquine EP impurity F Hydrochloride Impurity CS-EO-03610 6281-58-9 (Freebase) Enquire
Hydroxychloroquine Impurity 18 Impurity CS-O-59904 ---- Enquire
Hydroxychloroquine impurity 2 Impurity CS-O-46846 Not Available Enquire
Hydroxychloroquine N-Oxide Impurity Impurity CS-O-15325 1449223-88-4 In Stock
Hydroxychloroquine O-Sulfate Sulphate salt Impurity CS-O-52146 Not Available Enquire
Hydroxychloroquine sulfate Impurity 59 Impurity CS-O-59668 873969-89-2 Enquire
Hydroxychloroquine sulfate Impurity 69 Impurity CS-O-59651 500590-08-9 Enquire
N-Desethyl Chloroquine Hydrochloride Impurity CS-T-15919 4298-11-7 In Stock
4-Amino-N-ethyl-(2-hydroxyethyl)-pentylamine Impurity CS-U-00058 69559-11-1 Enquire
Bidesethylchloroquine Impurity CS-O-37601 Not Available Enquire
Chloroquine Related Compound G Impurity CS-P-08478 68121-48-2 (free base) Enquire
DesethylHydroxy Chloroquine HCl Impurity CS-O-40581 159358-29-9 Enquire
Didesethyl Chloroquine Hydroxyacetamide Impurity CS-T-52739 1159977-30-6 Enquire
Hydroxychloroquine Dimer Di HCl Impurity CS-EO-00513 2732209-42-4 (Freebase) Enquire
Hydroxychloroquine EP Impurity F HCl Impurity CS-EO-01561 ---- Enquire
Hydroxychloroquine sulfate impurity E Impurity CS-T-51045 10500-64-8 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Desethyl Chloroquine Intermediate CS-T-15710 1476-52-4 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Hydroxychloroquine-O-Beta-D-Glucuronide Glucuronide CS-O-45777 2439157-39-6 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-(7-chloroquinolin-4-yl)-N-(5-(2-hydroxyethylamino)pentan-2... Nitrosamine CS-O-59823 ---- Enquire
N-N-Dinitroso Hydroxychloroquine EP Impurity C Nitrosamine CS-O-59824 ---- Enquire
N-Nitroso Chloroquine Nitrosamine CS-O-38897 Not Available Enquire
N-Nitroso Desethyl Chloroquine Nitrosamine CS-O-41379 Not Available In Stock
N-Nitroso Hydroxychloroquine EP Impurity B Nitrosamine CS-O-56923 ---- Enquire
N-Nitroso Hydroxychloroquine EP Impurity C Nitrosamine CS-O-51701 ---- Enquire
N-Nitroso Hydroxychloroquine EP Impurity D Nitrosamine CS-O-56920 ---- Enquire
N-Nitroso Hydroxychloroquine Impurity 18 Nitrosamine CS-O-56922 ---- Enquire
N-Nitroso Hydroxychloroquine-O-Acetate Nitrosamine CS-O-56921 ---- Enquire
N-Nitroso-HYDROXYCHLOROQUINE Nitrosamine CS-O-38499 Not Available In Stock


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Chloroquine phosphate Secondary Standards CS-SS-24275-1GM 50-63-5 Enquire
Chloroquine Related Compound A Secondary Standards CS-SS-25272-50MG 86-98-6 Enquire
Chloroquine Related Compound D Secondary Standards CS-SS-25965-40MG 1476-52-4 Enquire
Chloroquine Related Compound E Secondary Standards CS-SS-25966-40MG Not Available Enquire
Chloroquine Related Compound G Secondary Standards CS-SS-25670-40MG Not Available Enquire
Hydroxychloroquine Sulfate Secondary Standards CS-SS-24730-1GM 747-36-4 Enquire


Analytical Standard

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Chloroquine Analytical Standard CS-O-38897-10MG Not Available Enquire
N-nitroso-chloroquine-100 PPM in Acetonitrile Analytical Standard CS-O-38897-1.5ML Not Available Enquire
N-Nitroso-HYDROXYCHLOROQUINE Analytical Standard CS-O-38499-10MG Not Available Enquire
N-nitroso-hydroxychloroquine-100 PPM in Acetonitrile Analytical Standard CS-O-38499-1.5ML Not Available Enquire


Chiral

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
R(-)-Hydroxy Chloroquine Chiral CS-O-14373 137433-23-9 Enquire
S(+)-Hydroxy Chloroquine Chiral CS-O-14374 137433-24-0 Enquire