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

Oxalate Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(±)-Fluoxetine-d4 Oxalate (trifluoromethylphen-d4-oxy) Stable Isotopes CS-C-01482 2708283-92-3 Enquire
Acetyl Citalopram-d6 Oxalate Stable Isotopes CS-T-94318 637026-02-9 Unlabelled Enquire
Clomipramine Oxalate D6 Stable Isotopes CS-EO-02979 Not Available Enquire
Desisopropyl Disopyramide-d7 Oxalate Stable Isotopes CS-T-52167 1216961-48-6 Enquire
Despropyl Propafenone-d6 Oxalate Stable Isotopes CS-O-50617 93885-20-2(Unlabeled) In Stock
Duloxetine-D3 Oxalate Stable Isotopes CS-SN-00028 2983161-45-9 Enquire
Fluoxetine-d6 Oxalate Stable Isotopes CS-BX-00840 2319722-08-0 In Stock
HYDROXYCHLOROQUINE DIOXALATE SALT Stable Isotopes CS-SN-00042 118-42-3(free base) Enquire
N-Methyl Serotonin-d3 Oxalate Salt Stable Isotopes CS-T-98715 Not Available Enquire
Paroxetine-D6 Oxalate Stable Isotopes CS-EO-02384 1435728-63-4 (free base) Enquire
PD 144418-d7 Oxalate Stable Isotopes CS-T-99904 Not Available Enquire
rac N-Methyl Atomoxetine-d6 Oxalate Stable Isotopes CS-T-97317 Not Available Enquire
rac-Naloxegol-d4 Oxalate Stable Isotopes CS-O-44778 1354744-91-4(Unlabeled) Enquire
rac-N-Methyl-frovatriptan-d6 Oxalate Stable Isotopes CS-T-100032 Not Available Enquire
Trihydroxybenzyl Hydrazine-15N2 Oxalate Stable Isotopes CS-O-58820 1246820-15-4 (Freebase) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Citalopram oxalate API CS-T-96131 207559-01-1 In Stock
Dimethyl Oxalate API CS-DB-00063 553-90-2 In Stock
Naftidrofuryl Oxalate API CS-AH-00241 3200-06-4 In Stock
Naloxegol Oxalate API CS-O-15575 1354744-91-4 In Stock
Atracurium oxalate API CS-O-32187 64228-78-0 Enquire
Norfluoxetine Oxalate API CS-K-00314 107674-50-0 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Desbutyl Dronedarone Oxalate Metabolite CS-O-07813 141626-35-9(Freebase) In Stock
N-Desethyl Brinzolamide Oxalate Metabolite CS-O-10351 2775292-24-3 In Stock
N-Desethyl Etifoxine oxalate Metabolite CS-EK-00408 21715-42-4 Enquire
O-Desmethyl Sulfadoxine oxalate salt Metabolite CS-EO-03867 1346604-08-7 (Freebase) Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(1S,3R,4S)-Ethyl 4-Amino-3-((tert-butoxycarbonyl)amino)cyclo... Impurity CS-T-22451 1093351-24-6 In Stock
2-(4-methyl-2-phenylpiperazin-1-yl)nicotinonitrile oxalate Impurity CS-O-40540 331815-15-7 In Stock
Almotriptan EP Impurity D (Oxalate) Impurity CS-EO-03193 1018676-03-3 Enquire
Amlodipine EP Impurity D Oxalate Salt Impurity CS-O-07176 1216406-90-4 In Stock
Avibactam Impurity 1 oxalate salt Impurity CS-O-47142 2413365-40-7 Enquire
Boc-T3295-Oxalate Salt Impurity CS-O-45127 1993394-54-9 Enquire
Carboxyterbinafine Oxalate Impurity CS-B-00398 99473-14-0 (free base) Enquire
Citalopram EP Impurity E (Oxalate salt) Impurity CS-EO-03448 1329612-81-8 Enquire
Citalopram EP Impurity F (Oxalate salt) Impurity CS-EO-03447 64372-43-6 Enquire
Citalopram EP Impurity G Oxalate salt Impurity CS-O-49018 1440961-12-5 Enquire
Des allyl Naloxegol Oxalate impurity Impurity CS-O-44443 2194602-13-4(FREE BASE) Enquire
Des(2-Cyano) 4-Cyano Alogliptin oxalate Impurity Impurity CS-O-45141 1638544-62-3 (Freebase) Enquire
Duloxetine EP Impurity F (oxalate) Impurity CS-EO-01402 2379325-42-3 In Stock
Duloxetine N-methyl (R)-isomer oxalate Impurity CS-EO-02206 932013-45-1 Enquire
Edoxaban Impurity 25(1R,2S,4R) Oxalate Impurity CS-EO-03514 2605225-72-5 Enquire
Edoxaban Impurity 27(1R,2R,4R) oxalate salt Impurity CS-EO-03515 2081883-53-4 (Freebase) Enquire
Edoxaban Impurity 3 Oxalate Impurity CS-O-61028 2703724-30-3 Enquire
Edoxaban Impurity 4 Oxalate Impurity CS-EO-03512 2081883-57-8 (Freebase) Enquire
Escitalopram EP Impurity I (oxalate salt) Impurity CS-EO-03540 920282-75-3 (Freebase) Enquire
Lacosamide Related Compound D (Oxalate Salt) Impurity CS-EO-01588 1379592-19-4 In Stock
N-desacetyl Lacosamide oxalate salt Impurity CS-O-46665 1325220-61-8 In Stock
N-Desmethyl Dapoxetine Oxalate Impurity CS-O-53887 ---- Enquire
N-Hydrxy Chloropyramine oxalate Impurity CS-O-58254 ---- Enquire
Nicardipine Hydrochloride - Impurity A (Oxalate Salt) Impurity CS-O-57378 2771193-14-5 Enquire
N-Methyl (R)-Duloxetine 3-Isomer Oxalate Impurity CS-O-49016 Not Available Enquire
Prazosin oxalate EP Impurity D Impurity CS-EO-03779 2668266-50-8 Enquire
RS-N,N- Dimethyl-3-(1-Naphthalenyloxy)-3-(2-thienyl)-1-propa... Impurity CS-O-10738 116817-12-0 In Stock
Ruxolitinib S-isomer Oxalate Impurity CS-EO-03842 1883417-29-5 Enquire
tert-Butyl ((1R,2R,5R)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-59222 ---- Enquire
tert-Butyl ((1R,2R,5S)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-59223 1928729-31-0 Enquire
tert-Butyl ((1R,2S,5R)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-59217 ---- Enquire
tert-Butyl ((1R,2S,5S)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-T-71497 1210348-34-7 Enquire
tert-Butyl ((1S,2R,5S)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-59218 3063998-92-2 Enquire
tert-Butyl [(1R,2S,5S)-2-Amino-5-[(dimethylamino)carbonyl]cy... Impurity CS-ED-42033 1353893-22-7 Enquire
({4-[2-(4-methyl-1- piperidinyl)ethoxy]phenyl}(phenyl)methan... Impurity CS-O-38325 Not Available Enquire
(1-{4-[2-(1-piperidinyl)ethoxy]phenyl}ethanone oxalate) Impurity CS-O-38324 Not Available Enquire
1H-Indol-5-ylmethylamine oxalate Impurity CS-M-25052 81881-74-5 Enquire
Dabigatran Impurity-II oxalate Impurity CS-O-38443 1354892-78-6 (Free Base) Enquire
Dehydro Ivabradine Oxalate Impurity CS-P-01058 1346558-08-4 Enquire
Ivabradine oxalate Impurity CS-O-36919 1086026-42-7 Enquire
Ivabradine Oxalate Impurity A Impurity CS-O-36840 Not Available Enquire
Ivabradine Oxalate Impurity B Impurity CS-O-36920 Not Available Enquire
Ivabradine Oxalate Impurity D Impurity CS-O-36841 Not Available Enquire
Ivabradine Oxalate Impurity F Impurity CS-O-36842 Not Available Enquire
Ivabradine Oxalate R-Isomer Impurity CS-O-36843 Not Available Enquire
Naftidrofuryl Oxalate - Impurity C (Oxalate Salt) Impurity CS-K-00245 115025-99-5 Enquire
N-Desmethyl Almotriptan oxalate Impurity CS-O-39690 334981-35-0 Enquire
Oxime Impurity of Escitalopram Oxalate Impurity CS-T-94233 227954-88-3 Enquire
RASAGILINE FIRST STEP OXALATE Impurity CS-O-40660 Not Available Enquire
Salmeterol EP Impurity C Oxalate salt Impurity CS-O-34250 94749-11-8 (Free base) Enquire
tert-butyl ((1S,2R,5R)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-39413 Not Available Enquire
tert-butyl ((1S,2S,5R)-2-amino-5-(dimethylcarbamoyl)cyclohex... Impurity CS-O-39412 Not Available Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-((dimethylamino)methyl)-5-methylhexan-2-one oxalate Fine Chemicals CS-O-52946 2102090-17-3 Enquire
Calcium oxalate hydrate Fine Chemicals CS-ZJ-08688 24804-31-7 In Stock
Ammonium oxalate Fine Chemicals CS-MM-12304 1113-38-8 Enquire
Diisopropyl oxalate Fine Chemicals CS-O-37980 615-81-6 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Potassium tetraoxalate Building Blocks CS-O-44285 127-96-8 Enquire
Ammonium oxalate monohydrate Building Blocks CS-DB-00011 6009-70-7 Enquire
Bis(tetramethylammonium) oxalate Building Blocks CS-DE-01649 98296-17-4 Enquire


Pesticide Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Thiocyclam hydrogenoxalate Pesticide Standards CS-BX-00637 31895-22-4 Enquire