5-chloro-[1,2,4]triazolo[4,3-c]pyrimidine CAS 1936595-47-9
| CAS No. | 1936595-47-9 |
| Molecular Formula | C5H3ClN4 |
| Molecular Weight | 154.56 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.
CATO supplies 5-chloro-[1,2,4]triazolo[4,3-c]pyrimidine (CAS 1936595-47-9), a certified reference material (molecular formula C5H3ClN4, MW 154.56 g/mol) for analytical method development and quality control.
Owing to a nitrile group, chlorine substitution, 5-chloro-[1,2,4]triazolo[4,3-c]pyrimidine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 154.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C5H3ClN4 |
| Molecular Weight | 154.56 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related chloro Standards
- 3-chloro-[1,2,4]triazolo[4,3-a]pyrimidine (CAS 1020036-31-0)
- 4-Chloro-1H-imidazo[4,5-d]pyridazine (CAS 1083181-53-6)
- 6-Chloro-7H-purine (CAS 111055-92-6)
- 7-Chloro-[1,2,4]triazolo[1,5-c]pyrimidine (CAS 1159811-23-0)
- 5-Chloro-1H-pyrazolo[3,4-b]pyrazine (CAS 116527-52-7)
- 5-Chloro-1H-imidazo[4,5-b]pyrazine (CAS 1196151-76-4)
- 6-Chloro-3H-[1,2,3]triazolo[4,5-c]pyridine (CAS 120641-09-0)
- 8-Chloro-[1,2,4]triazolo[4,3-c]pyrimidine (CAS 1208083-81-1)
Recommended Standards
- 5-Chloro-2H-pyrazolo[4,3-d]pyrimidine (CAS 1934463-02-1)
- (6-Chloropyridazin-3-yl)cyanamide (CAS 83412-75-3)
- 3-Chloro-[1,2,4]triazolo[4,3-a]pyrazine (CAS 1823887-49-5)
- 2-Amino-6-chloropyrimidine-4-carbonitrile (CAS 2091438-66-1)
- Ethyl azepane-4-carboxylate (CAS 145177-54-4)
- Dipropylammonium Acetate (ca. 0.5mol/L in Water) [Ion-Pair Reagent for LC-MS] (CAS 114389-69-4)
- 4-Nitrocatechol (CAS 3316-09-4)
- 4-(Furan-2-carbonyl)-3-hydroxy-1-(3-morpholinopropyl)-5-(4-nitrophenyl)-1H-pyrrol-2(5H)-one (CAS 378760-44-2)
- 1-(4-Fluorobutyl)piperazine (CAS 356044-78-5)
- 2,5-pyridinedicarboxylic acid chloride 5620-35-9 (CAS 5620-35-9)
- 1054AC 497883-22-4 C36H30NO2P N,N-Bis((R)-1-phenylethyl)dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-amine (CAS 497883-22-4)
- 2-Methyl-4-phenyl-2H-benzo[e][1,2,4]thiadiazin-3(4H)-one 1,1-dioxide (CAS 1000573-89-6)
- 3-(Boc-amino)-1-[(tert-butyldimethylsilyl)oxy]-2-propanol (CAS 195197-94-5)
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