Ethyl 5-chloro-1H-1,2,3-triazole-4-carboxylate CAS 81581-11-5
| CAS No. | 81581-11-5 |
| Molecular Formula | C5H6ClN3O2 |
| Molecular Weight | 175.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, Ethyl 5-chloro-1H-1,2,3-triazole-4-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 175.57 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies Ethyl 5-chloro-1H-1,2,3-triazole-4-carboxylate (CAS 81581-11-5), a certified reference material (molecular formula C5H6ClN3O2, MW 175.57 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Ethyl 5-chloro-1H-1,2,3-triazole-4-carboxylate 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 | C5H6ClN3O2 |
| Molecular Weight | 175.57 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 sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- 2-(4-Chloro-3-imino-2,3-dihydro-1h-pyrazol-1-yl)acetic acid (CAS 1006340-80-2)
- 4-Chloro-1-ethyl-3-nitro-1h-pyrazole (CAS 1006993-51-6)
- Methyl 4-chloro-3-methylisoxazole-5-carboxylate (CAS 103912-55-6)
- 2-Chloro-N-(5-methyl-1,3,4-oxadiazol-2-yl)acetamide (CAS 1049873-58-6)
- 4-Chloro-1,5-dimethyl-3-nitro-1H-pyrazole (CAS 1172928-09-4)
- 2-Chloro-N-(3-methyl-1,2,4-oxadiazol-5-yl)acetamide (CAS 1181505-87-2)
- 2-(5-Chloro-3-methyl-1,2-oxazol-4-yl)acetic acid (CAS 1239758-91-8)
- 1243250-11-4 3-(3-Chloro-1H-1,2,4-triazol-5-yl)propanoic acid 3008AD C5H6ClN3O2 (CAS 1243250-11-4)
Recommended Standards
- Ethyl 5-chloro-1,2-oxazole-3-carboxylate (CAS 343566-56-3)
- Ethyl2-chloroxazole-4-carboxylate (CAS 46081-18-9)
- Ethyl 4-chlorooxazole-5-carboxylate (CAS 2095432-64-5)
- Methyl 2-(chloromethyl)-1,3-oxazole-4-carboxylate, 97% (CAS 208465-72-9)
- 4-(2-(Piperidin-4-yloxy)ethyl)morpholine (CAS 1062625-66-4)
- 4-(1-Methylethyl)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2223035-51-4)
- 4-Bromo-N,N-dimethyl-1H-pyrazole-1-sulfonamide (CAS 214342-72-0)
- 1,2-Dibromo-4-chloro-1,1,2-trifluorobutane (CAS 502457-70-7)
- 6-(Isopropylthio)imidazo[2,1-b]thiazole-5-carbaldehyde (CAS 338976-44-6)
- methyl 3-(4-formyl-1,2-oxazol-3-yl)propanoate (CAS 153881-73-3)
- (6-Methyl-2,3,4,9-tetrahydro-1H-carbazol-8-yl)methanamine (CAS 883544-66-9)
- N-[(1R)-2,3-dihydro-1H-inden-1-yl]-2-ethoxyacetamide (CAS 1431699-54-5)
- 5'-[(Desloratadine)methyl] Rupatadine-d8 (CAS 1794669-33-2)
- D-Val23-Tirzepatide (CAS CATO-CPTD788911)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com