4,7-Dichlorothiazolo[4,5-d]pyridazine CAS 13669-90-4
| CAS No. | 13669-90-4 |
| Molecular Formula | C5HCl2N3S |
| Molecular Weight | 206.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4,7-Dichlorothiazolo[4,5-d]pyridazine (CAS 13669-90-4), molecular formula C5HCl2N3S and molecular weight 206.05 g/mol, is a CATO reference standard with documented purity and traceability.
4,7-Dichlorothiazolo[4,5-d]pyridazine (C5HCl2N3S) contains a nitrile group, sulfur-containing functionality, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C5HCl2N3S |
| Molecular Weight | 206.05 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1960 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Dichlorothiazolo Standards
- 5,7-Dichlorothiazolo[4,5-d]pyrimidine (CAS 1137278-39-7)
- 5,7-Dichlorothiazolo[5,4-d]pyrimidine (CAS 13479-88-4)
- 2,5-Dichlorothiazolo[5,4-d]pyrimidine (CAS 13479-89-5)
- 2,7-Dichlorothiazolo[5,4-d]pyrimidine (CAS 19602-61-0)
- 2,6-Dichlorothiazolo[4,5-c]pyridine (CAS 1206980-92-8)
- 2,6-Dichlorothiazolo[5,4-b]pyridine (CAS 159870-89-0)
- 2,5-Dichlorothiazolo[4,5-b]pyridine (CAS 2567498-97-7)
- 2,5-Dichlorothiazolo[5,4-b]pyridine (CAS 857970-66-2)
Recommended Standards
- (4-(Cyclopropylmethoxy)-3-methylphenyl)boronic acid (CAS 1350513-26-6)
- (4-Methyl-6-(pyrrolidin-1-yl)pyridin-3-yl)boronic acid (CAS 1704069-45-3)
- 2,5-Bis(trifluoromethyl)-1,3,4-oxadiazole (CAS 1868-48-0)
- (6-(2-Methylpyrrolidin-1-yl)pyridin-3-yl)boronic acid (CAS 1951411-68-9)
- 1-(4-Fluoro-2-iodophenyl)-1h-pyrazole-3-carboxylic acid (CAS 1540013-00-0)
- 2-(2-Aminophenyl)-7-methoxyquinoline-5,8-dione (CAS 61472-48-8)
- 2-Amino-N-cyclohexyl-5-fluorobenzamide (CAS 1094378-66-1)
- 2-Hydroxy-2-phenylmalonamide (CAS 53696-75-6)
- 4-Chloro-2-(trifluoromethyl)-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine (CAS 763925-38-8)
- 2-Chloro-n-ethyl-n-{[(thiophen-2-ylmethyl)carbamoyl]methyl}acetamide (CAS 874594-85-1)
- 2-[(dimethoxyphosphoryl)oxy]-1h-benzo[de]isoquinoline-1,3(2h)-dione 65973-73-1 AR-1D6185 (CAS 65973-73-1)
- methyl 2-ethylpent-4-ynoate (CAS 42998-00-5)
- 2-(1-Phenylcyclopropyl)pyrimidine-5-carboxylic acid (CAS 1273985-83-3)
- Semaglutide Impurity 165 (CAS CATO-C4X-2226165)
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