4-Methylquinazoline-2-thiol CAS 25809-91-0
| CAS No. | 25809-91-0 |
| Molecular Formula | C9H8N2S |
| Molecular Weight | 176.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Methylquinazoline-2-thiol (CAS 25809-91-0), molecular formula C9H8N2S and molecular weight 176.24 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8N2S, 4-Methylquinazoline-2-thiol contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 176.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 4-Methylquinazoline-2-thiol under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H8N2S |
| Molecular Weight | 176.24 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methylquinazoline Standards
- 2-Methylquinazoline-4-thiol (CAS 6484-28-2)
- 3-Methylquinazoline-2,4(1h,3h)-dione (CAS 607-19-2)
- 5-Methylquinazoline-2,4-diol (CAS 52570-39-5)
- 6-Methylquinazoline-2,4-diamine (CAS 1955-61-9)
- 2-Methylquinazoline-4,6-diamine (CAS 90558-57-9)
- 5-Methylquinazoline-2,4-diamine (CAS 27018-14-0)
- 7-Methylquinazoline-2,4-diamine (CAS 27018-16-2)
- 1-methylquinazoline-2,4-dione (CAS 604-50-2)
Recommended Standards
- 4-Methylphthalazine-1-thiol (CAS 54145-23-2)
- 4-Phenyl-1,3-thiazol-5-amine (CAS 412311-69-4)
- 4,5-Dihydro-1H-thieno[3',2':3,4]benzo[1,2-d]imidazole (CAS 366782-98-1)
- 4-Phenyl-2-thiazolamine (CAS 2010-06-2)
- 2-(1-((4-Methylpiperazin-1-yl)sulfonyl)azetidin-3-ylidene)acetonitrile (CAS 1638759-72-4)
- Uridine-5,6-d2 (CAS 40632-21-1)
- 2-(Furan-2-yl)cyclobutan-1-ol (CAS 84099-57-0)
- (6-Chloro-1-ethyl-1H-benzo[d]imidazol-2-yl)methanol (CAS 1243979-63-6)
- Benzene, 2-(difluoromethoxy)-1,4-dimethyl- (CAS 1226388-16-4)
- 5-{[(3-methoxyphenyl)methyl]sulfanyl}-1,3,4-thiadiazol-2-amine (CAS 110076-51-2)
- Methyl 1-[[2-N-(5-Nitrothiazolyl)carboxamido]phenyl]-2,3,4- tri-O-acetyl-β-D-glucopyranuronate (CAS 221287-92-9)
- N,N'-Bis(2,4-dichlorophenyl)-2-{[(2-methoxyethyl)amino]methylidene}propanediamide (CAS 321433-39-0)
- (S)-5-Fluoro-2,3-dihydro-1H-inden-1-amine hydrochloride (CAS 2103399-35-3)
- Osteoblast Activating Peptide (mouse, rat) (H-7262.0500) (CAS 1222950-80-2)
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