4-(Ethylthio)-5-mercapto-2-methylpyridazin-3(2H)-one CAS 72039-20-4
| CAS No. | 72039-20-4 |
| Molecular Formula | C7H10N2OS2 |
| Molecular Weight | 202.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(Ethylthio)-5-mercapto-2-methylpyridazin-3(2H)-one (CAS 72039-20-4), molecular formula C7H10N2OS2 and molecular weight 202.30 g/mol, is a CATO reference standard with documented purity and traceability.
4-(Ethylthio)-5-mercapto-2-methylpyridazin-3(2H)-one (C7H10N2OS2) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. Its physicochemical properties are representative of its class; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-(Ethylthio)-5-mercapto-2-methylpyridazin-3(2H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H10N2OS2 |
| Molecular Weight | 202.30 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Ethylthio Standards
- 1-(Ethylthio)-3-isopropylcyclobutane-1-carboxylic acid (CAS 1483351-89-8)
- 1-(Ethylthio)-3-propylcyclobutane-1-carboxylic acid (CAS 1485008-96-5)
- 5-(Bis(ethylthio)methyl)-1H-pyrazole (CAS 321998-90-7)
- 3-(Ethylthio)-5-hydrazinyl-1H-pyrazole-4-carboxylic acid (CAS 117736-60-4)
- 2-(Ethylthio)nicotinoyl chloride (CAS 123116-01-8)
- 2-(2-(Ethylthio)thiazol-4-yl)acetic acid (CAS 446827-11-8)
- 2-(Ethylthio)-4-methylquinoline (CAS 817166-24-8)
- 5-(Bis(ethylthio)methyl)-1H-1,2,4-triazole (CAS 400088-56-4)
Recommended Standards
- 4-(Diisopropylamino)benzonitrile (CAS 282118-97-2)
- 4-BENZYL-1,4-DIAZABICYCLO[3.2.1]OCTANE (CAS 675589-81-8)
- 4-(Adamantan-1-yl)-1H-pyrazole (CAS 84396-62-3)
- 4-Benzyl-4,7-diazaspiro[2.5]octane (CAS 611235-29-1)
- 3-Bromo-5-(2-methoxyethoxy)benzaldehyde (CAS 1160184-91-7)
- Methyl 2-(3-azetidinyloxy)benzoate (CAS 1220038-61-8)
- 3,5-Dimethyl-1-(2-methyl-allyl)-1H-pyrazole-4-carbaldehyde (CAS 1004365-13-2)
- 3-Acetamido-4-methylphenyl acetate (CAS 220139-79-7)
- Ethyl 2-amino-2-hydrazonoacetate (CAS 53085-26-0)
- 1-(3-(3,4-Dihydro-2H-pyrrol-5-yl)pyridin-2-yl)piperazine (CAS 1352519-33-5)
- 2-Chloro-4-fluorobenzenesulfonamide (CAS 69156-30-5)
- (5-Aminomethyl-pyrazin-2-yl)-carbamic acid tert-butyl ester (CAS 369638-71-1)
- 2-(3,5-Dichlorophenyl)-6-methylbenzo[d]thiazole (CAS 1242303-31-6)
- Tirzepatide Impurity 11 TFA salt (CAS CATO-C4X-324011)
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