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

Metamizole Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Methylamino Antipyrine-d3 Stable Isotopes CS-P-02896 1246820-06-3 In Stock
4-Methylaminoantipyrine-D3 (methyl-d3) hydrogen sulphate Stable Isotopes CS-O-36485 Not Available Enquire
Metamizole EP Impurity C-d3 hydrochloride Stable Isotopes CS-O-58482 856307-27-2 (Unlabeled) Enquire
Metamizole-d11 (Sodium) Stable Isotopes CS-O-48742 68-89-3 (Unlabelled) In Stock
Metamizole-D3 (sodium salt) Stable Isotopes CS-EO-02468 2512223-60-6 Enquire
Metamizole-d6 Magnesium Salt Dimer Stable Isotopes CS-T-101154 - Enquire
Metamizole-d8 (Sodium) Stable Isotopes CS-O-48741 68-89-3 (Unlabelled) In Stock
4-Dimethylamino Antipyrine-d6 Stable Isotopes CS-T-92064 91419-95-3 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Analgin API CS-DF-00015 5907-38-0 In Stock
Metamizole Sodium API CS-O-04720 68-89-3 Enquire
Metamizole API CS-ED-00986 50567-35-6 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Acetamidoantipyrine Metabolite CS-O-03502 83-15-8 In Stock
4-hydroxy Antipyrine Metabolite CS-O-14013 1672-63-5 In Stock


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Dimethylamino Antipyrine Impurity CS-W-00200 58-15-1 In Stock
5-Acetylimino-4-methyl-2 benzyl sulfinyl-1,3,4-thiadiazole Impurity CS-O-43989 2365289-85-4 Enquire
Metamizole EP Impurity B Impurity CS-T-03236 83-07-8 Enquire
Metamizole EP Impurity C Impurity CS-O-31127 519-98-2 In Stock
Metamizole EP Impurity E Impurity CS-O-15802 117-38-4 Enquire
Metamizole Impurity 1 Impurity CS-O-56463 106236-80-0 Enquire
Metamizole Impurity 2 Impurity CS-EO-01794 Not Available Enquire
Metamizole Impurity 3 Impurity CS-EO-02758 Not Available Enquire
Metamizole Impurity 5 Impurity CS-O-56464 810-16-2 Enquire
Metamizole Impurity A Impurity CS-O-31126 1672-58-8 In Stock
Metamizole Impurity C Sulfate salt Impurity CS-O-46018 519-98-2 (Freebase) Enquire
Metamizole impurity E Sodium Salt Impurity CS-T-57468 129-89-5 In Stock
Metamizole-2-oxopyrrolidin impurity Impurity CS-O-59825 ---- Enquire
N-(2-(Diethylamino)ethyl)-5-((5-fluoro-2-oxoindolin-3-yliden... Impurity CS-O-54363 342641-94-5 Enquire
Metamizole Impurity 4 Impurity CS-P-08997 62902-13-0 Enquire
Metamizole Impurity 5 Impurity CS-EO-01337 Not Available Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Metamizole Magnesium Salt Intermediate CS-T-80445 63372-86-1 In Stock


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Metamizole EP Impurity C Nitrosamine CS-O-45530 73829-38-6 In Stock
N-Nitroso Metamizole EP Impurity E (Mixture of isomer) Nitrosamine CS-EO-02676 Not Available In Stock
N-Nitroso Metamizole Impurity 2 Nitrosamine CS-EO-02677 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Metamizole Impurity A Secondary Standards CS-SS-25536-100MG 1672-58-8 Enquire
Metamizole Impurity B Secondary Standards CS-SS-25537-100MG 83-07-8 Enquire
Metamizole Impurity C Secondary Standards CS-SS-25538-100MG 856307-27-2 Enquire
Metamizole Impurity D Secondary Standards CS-SS-25539-100MG 58-15-1 Enquire
Metamizole Sodium Secondary Standards CS-SS-24748-100MG 5907-38-0 Enquire