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

Antipyrin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Acetamido Antipyrine-d3 Stable Isotopes CS-T-94810 342821-66-3 Enquire
4-Acetamido D3-antipyrine Stable Isotopes CS-W-00204 Not Available Enquire
4-Aminoantipyrine D3 Stable Isotopes CS-W-00108 68229-55-0 Enquire
4-Dimethyl D6 aminoantipyrine picrate Stable Isotopes CS-W-00127 111385-95-6(Unlabeled) Enquire
4-Dimethylamino Antipyrine-d6 Stable Isotopes CS-T-92064 91419-95-3 Enquire
4-Formyl Antipyrine-d3 Stable Isotopes CS-T-74425 1346603-54-0 Enquire
4-Formylamino Antipyrine-d3 Stable Isotopes CS-T-100286 Not Available Enquire
4-Formylaminoantipyrine-D3 Stable Isotopes CS-W-00383 Not Available Enquire
4-Hydroxyantipyrine-D3 Stable Isotopes CS-W-00382 Not Available Enquire
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
4-Methylaminoantipyrine-D3 picrate Stable Isotopes CS-W-00375 Not Available Enquire
4-Methylaminoantipyrine-D3(Methylamine-D3) hydrogen sulfate Stable Isotopes CS-W-00379 1246820-06-3(Freebase) Enquire
Antipyrin-13C Stable Isotopes CS-O-48381 60-80-0(Unlabelled) In Stock
Antipyrine-d3 Stable Isotopes CS-T-48291 65566-62-3 In Stock
Antipyrine-d7 Stable Isotopes CS-O-57368 60-80-0 In Stock


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aminoantipyrine API Standards CS-P-03100 Not Available Enquire
Antipyrine API Standards CS-O-11032 60-80-0 In Stock
Isopropylaminoantipyrine API Standards CS-W-00186 3615-24-5 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Acetamidoantipyrine Metabolites CS-O-03502 83-15-8 In Stock
4-hydroxy Antipyrine Metabolites CS-O-14013 1672-63-5 In Stock
4-Sulfate Aminoantipyrine Metabolites CS-P-07206 1759-26-8 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"4,4’-Dihydroxyantipyrine" Impurities CS-T-91329 72732-51-5 Enquire
4-Aminoantipyrine N-Carbamic Acid Methyl Ester Impurities CS-T-01890 10077-96-0 Enquire
4-Dimethylamino Antipyrine Impurities CS-W-00200 58-15-1 In Stock
4-Formyl Antipyrine Impurities CS-T-24660 950-81-2 Enquire
4-Formyl Methylamino Antipyrine (FMAA) Impurities CS-P-07205 1672-59-9 Enquire
4-Propyl Aminoantipyrine Hydrochloride Impurities CS-P-06974 101116-41-0 (free base) Enquire
Nitrosoantipyrine Impurities CS-T-59327 885-11-0 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Hydroxymethylantipyrine Intermediates CS-T-79474 18125-49-0 Enquire
4-Aminoantipyrine hydrochloride Intermediates CS-ED-04375 22198-72-7 Enquire
4-Methylamino Antipyrine Intermediates CS-T-82171 519-98-2 Enquire
Antipyrine 2-Hydroxy-2-methylbutyrate Intermediates CS-T-66772 5794-16-1 Enquire
Norantipyrine Sulfate Intermediates CS-T-83136 76407-98-2 Enquire


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Norantipyrine Glucuronide Glucuronides CS-T-83052 67566-02-3 In Stock