3-Chloro-2H-indazole CAS 457891-36-0
| CAS No. | 457891-36-0 |
| Molecular Formula | C7H5ClN2 |
| Molecular Weight | 152.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrile group, chlorine substitution, an aromatic ring system, 3-Chloro-2H-indazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 152.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
3-Chloro-2H-indazole (CAS 457891-36-0), molecular formula C7H5ClN2 and molecular weight 152.58 g/mol, is a CATO reference standard with documented purity and traceability.
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 3-Chloro-2H-indazole 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 | C7H5ClN2 |
| Molecular Weight | 152.58 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 3-Chloro-2-ethynylphenol (CAS 2228553-96-4)
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- 3-chloro-6-methoxy-1,2,4,5-tetrazine (CAS 614756-34-2)
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- 3-(3-Chloro-4-methylphenyl)-2-methyl-2,3,5,6-tetrahydro-4H-2,6-methanobenzo[g][1,3,5]oxadiazocin-4-one (CAS 899986-42-6)
- N-(3-Methyl-2,7-dioxo-3,7-dihydro-2H-naphtho[1,2,3-de]quinolin-6-yl)benzenesulfonamide (CAS 633279-99-9)
- n-(2-Amino-2-phenylethyl)-2,5-dimethylthiophene-3-sulfonamide hydrochloride (CAS 1423034-67-6)
- 8-Methoxyquinolin-2-amine (CAS 104090-86-0)
- 6-(Benzo[d][1,3]dioxol-5-yl)-2-oxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid (CAS 860610-20-4)
- (3AR,4S,4aR,7aR,8R,9aR)-4a,8-dimethyl-3-methylene-2,5-dioxo-2,3,3a,4,4a,5,7a,8,9,9a-decahydroazuleno[6,5-b]furan-4-yl acetate (CAS 10180-86-6)
- 2-(2-Methyl-1H-benzo[d]imidazol-5-yl)acetonitrile (CAS 31234-01-2)
- Fragment-[3-31]-Semaglutide (CAS CATO-C4X-2226113)
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