4-Methylamino antipyrine - Moligand™,≥98% , CAS No.519-98-2

CAS: 519-98-2 Cat. No.: M651502 Molecular Weight: 217.27 EC Number: 208-281-3
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GRADE & PURITY Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%
Synonyms
4-Methylaminophenazone | N-Methyl-4-aminophenazone | 1,2-Dihydro-1,5-dimethyl-4-(methylamino)-2-phenyl-3H-pyrazol-3-one | N-Methylaminophenazone | 4-Methylamino Antipyrine | 3H-Pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-4-(methylamino)-2-phenyl- | EN300-1037
Storage
Store at -20°C,Argon charged
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
10mg
M651502-10mg
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$9.90
50mg
M651502-50mg
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$29.90
250mg
M651502-250mg
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$99.90
1g
M651502-1g
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$289.90
5g
M651502-5g
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$999.90
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Why this grade

Moligand™,≥98% Moligand™ for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at -20°C,Argon charged Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 1 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

4-Methylamino antipyrine is an active metabolite of Metamizole. Metamizole is a pyrazolone non-steroidal anti-inflammatory drug (NSAID) and inhibits COX . Metamizole is an nonopioid analgesic agent and can be used for pain and fever 4-Methylamino antipyrine has analgesic, antipyretic, and relatively weak antiinflammatory properties .

In Vitro

Metamizole is a prodrug which, at room temperature and in an atmosphere with oxygen, is spontaneously, nonenzymatically converted to 4-Methylamino antipyrine. Subsequently, the N-methyl side chain of 4-Methylamino antipyrine is oxidized to yield 4-formylaminoantipyrine, which is further converted to 4-aminoantipyrine. Metamizole in aqueous solution and in the presence of oxygen consists of a group of several pyrazolone derivatives of which 4-Methylamino antipyrine is pharmacologically the most important. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

The aim of this study is to assess the pharmacokinetics of its active metabolites 4-Methylamino antipyrine in male piglets after a single intramuscular injection of Metamizole. Eight healthy male piglets are administered Metamizole (100 mg/kg) intramuscularly. 4-Methylamino antipyrine plasma concentrations are quantitatively detectable from 0.25 to 48 h. The average maximum concentrations of 4-Methylamino antipyrine is of 47.59 mg/mL. The average half-lives is 8.57 h for 4-Methylamino antipyrine . MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Form:Solid

IC50& Target:COX

Specifications

Synonyms
4-Methylaminophenazone | N-Methyl-4-aminophenazone | 1, 2-Dihydro-1, 5-dimethyl-4-(methylamino)-2-phenyl-3H-pyrazol-3-one | N-Methylaminophenazone | 4-Methylamino Antipyrine | 3H-Pyrazol-3-one, 1, 2-dihydro-1, 5-dimethyl-4-(methylamino)-2-phenyl- | EN300-1037
Specifications & Purity
Moligand™, ≥98%
Biochemical and Physiological Mechanisms
4-Methylamino antipyrine is an active metabolite of Metamizole. Metamizole is a pyrazolone non-steroidal anti-inflammatory drug (NSAID) and inhibits COX . Metamizole is an nonopioid analgesic agent and can be used for pain and fever.
Storage
Store at -20°C, Argon charged
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Grade
Moligand™
Action Type
INHIBITOR
Purity
≥98%
Names and Identifiers
Canonical SmilesCC1=C(C(=O)N(N1C)C2=CC=CC=C2)NC
IUPAC Name1,5-dimethyl-4-(methylamino)-2-phenylpyrazol-3-one
InChIKeyJILCEWWZTBBOFS-UHFFFAOYSA-N
INCHI1S/C12H15N3O/c1-9-11(13-2)12(16)15(14(9)3)10-7-5-4-6-8-10/h4-8,13H,1-3H3
Isomeric SMILES CC1=C(C(=O)N(N1C)C2=CC=CC=C2)NC
Molecular Weight 217.27

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassAzoles
SubclassPyrazoles
Intermediate Tree Nodes Not available
Direct ParentPhenylpyrazoles
Alternative Parents Secondary alkylarylamines  Pyrazolones  Benzene and substituted derivatives  Vinylogous amides  Heteroaromatic compounds  Lactams  Azacyclic compounds  Organopnictogen compounds  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteromonocyclic compounds
Substituents Phenylpyrazole - Secondary aliphatic/aromatic amine - Monocyclic benzene moiety - Pyrazolinone - Benzenoid - Heteroaromatic compound - Vinylogous amide - Lactam - Secondary amine - Azacycle - Hydrocarbon derivative - Organic oxide - Organopnictogen compound - Organooxygen compound - Organonitrogen compound - Organic oxygen compound - Organic nitrogen compound - Amine - Aromatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as phenylpyrazoles. These are compounds containing a phenylpyrazole skeleton, which consists of a pyrazole bound to a phenyl group.
External Descriptors pyrazoles - secondary amino compound
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
PTGS1 Tclin Cyclooxygenase-1 (9233 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
PTGS2 Tclin Cyclooxygenase-2 (13999 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

5 results found

Lot NumberCertificate TypeDateItem
F2617571Certificate of AnalysisFeb 11, 2026 M651502
F2617572Certificate of AnalysisFeb 11, 2026 M651502
F2617573Certificate of AnalysisFeb 11, 2026 M651502
F2617574Certificate of AnalysisFeb 11, 2026 M651502
F2617575Certificate of AnalysisFeb 11, 2026 M651502
Chemical and Physical Properties
SolubilityDMSO : 50 mg/mL (230.13 mM; Need ultrasonic)
SensitivityAir sensitive
Molecular Weight217.270 g/mol
XLogP30.800
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count2
Exact Mass217.122 Da
Monoisotopic Mass217.122 Da
Topological Polar Surface Area35.600 Ų
Heavy Atom Count16
Formal Charge0
Complexity318.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
1. Jie Ding, Zan Dai, Fan Qin, Huiping Zhao, Shuai Zhao, Rong Chen.  (2016)  Z-scheme BiO1-xBr/Bi2O2CO3 photocatalyst with rich oxygen vacancy as electron mediator for highly efficient degradation of antibiotics.  APPLIED CATALYSIS B-ENVIRONMENTAL,      [PMID:] [10.1016/j.apcatb.2016.12.018]
Solution Calculators
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