2H-Thiazolo[5,4-e]indazole CAS 19546-91-9
| CAS No. | 19546-91-9 |
| Molecular Formula | C8H5N3S |
| Molecular Weight | 175.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2H-Thiazolo[5,4-e]indazole (CAS 19546-91-9) is a high-purity analytical reference standard with the molecular formula C8H5N3S and a molecular weight of 175.21 g/mol.
Based on its molecular formula C8H5N3S, 2H-Thiazolo[5,4-e]indazole 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 175.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C8H5N3S |
| Molecular Weight | 175.21 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related H Standards
- 2H-Thiazolo[4,5-g]indazole (CAS 19546-90-8)
- 7H-Thiazolo[5,4-e]indazole (CAS 19546-92-0)
- 2H-Thiazolo[5,4-g]indazole (CAS 218596-83-9)
- 6H-Thiazolo[5,4-e]indazol-2-amine (CAS 21444-01-9)
- Thiazolo[4',5':5,6]benzo[1,2-c]isoxazole (CAS 52876-88-7)
- Thiazolo[5',4':3,4]benzo[1,2-d]isoxazole (CAS 52876-89-8)
- 2H-Thiazolo[5,4-f]indole (CAS 126581-24-6)
- 2H-Thiazolo[4,5-e]indole (CAS 42394-80-9)
Recommended Standards
- 1-(Ethylsulfonyl)-1H-pyrazol-4-amine (CAS 1935538-93-4)
- 2-Aminobenzothiazole-6-carbonitrile (CAS 19759-66-1)
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- (1-(Methylsulfonyl)-1H-pyrrol-2-yl)methanol (CAS 202580-86-7)
- 1-(((1-(Bromomethyl)cyclopentyl)oxy)methyl)-4-chlorobenzene (CAS 1483554-63-7)
- (R,R)-2,5-Hexanediol (CAS 17299-07-9)
- 2-Amino-6-(aminomethyl)isonicotinonitrile (CAS 1393574-62-3)
- 2,5-Dibromo-3-chloropyrazine (CAS 21943-16-8)
- (3-(Thiophen-2-yl)pyrazin-2-yl)methanamine (CAS 1368469-28-6)
- 3-Oxo-2-(pyridin-4-yl)butanenitrile (CAS 126769-98-0)
- Ethyl 5-chloro-6-fluoropyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 2359650-50-1)
- 1105556-74-8 5-Methyl-6-oxo-6,6a,7,8,9,10-hexahydro-5H-pyrido-[1,2-a]quinoxaline-3-carboxylic acid (CAS 1105556-74-8)
- 4-(Methoxymethyl)phenol (CAS 5355-17-9)
- Tirzepatide Impurity 36 (CAS CATO-C4X-324036)
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