5-Chloro-1,3-dimethylpyrazole-4-carbaldehyde CAS 27006-76-4
| CAS No. | 27006-76-4 |
| Molecular Formula | C6H7ClN2O |
| Molecular Weight | 158.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Chloro-1,3-dimethylpyrazole-4-carbaldehyde.
5-Chloro-1,3-dimethylpyrazole-4-carbaldehyde (CAS 27006-76-4), molecular formula C6H7ClN2O and molecular weight 158.59 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 5-Chloro-1,3-dimethylpyrazole-4-carbaldehyde is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 158.59 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.
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.
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 | C6H7ClN2O |
| Molecular Weight | 158.59 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 1-(4-Chloro-1-methyl-1H-pyrazol-3-yl)ethan-1-one (CAS 1004194-08-4)
- 6-Chloro-N4-methylpyrimidine-2,4-diamine (CAS 1005-37-4)
- 4-Chloro-1-ethyl-1H-pyrazole-3-carbaldehyde (CAS 1005583-83-4)
- 4-chloro-1-ethyl-1h-pyraZole-5-carboxaldehyde (CAS 1005609-70-0)
- 1-(4-Chloro-1-methyl-1h-pyrazol-5-yl)ethan-1-one (CAS 1006482-78-5)
- 2-Chloro-5-hydrazinyl-phenol (CAS 1026536-72-0)
- 4-Chloro-2-(methoxymethyl)pyrimidine (CAS 105950-89-8)
- 3-Chloro-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine (CAS 1060814-43-8)
Recommended Standards
- 5-Amino-2-chloro-3-methoxypyridine (CAS 75711-01-2)
- 5-Chloro-1,4-dimethylpyrimidin-2(1H)-one (CAS 63331-37-3)
- 5-(Chloromethyl)-2-methoxypyrimidine (CAS 944902-19-6)
- 5-Chloro-1-ethyl-1H-imidazole-4-carbaldehyde (CAS 62260-62-2)
- 2-(4-Propoxybenzoyl)pyridine (CAS 898780-03-5)
- 2-((2-Methoxy-5-nitrophenyl)carbamoyl)cyclohexane-1-carboxylic acid (CAS 424811-77-8)
- 3-(Morpholin-4-yl)-3-oxopropanethioamide (CAS 89984-45-2)
- 2-(3-Fluoro-2-(trifluoromethyl)phenyl)acetic acid (CAS 897940-14-6)
- 4-Fluoro-N-(quinolin-2-ylmethylene)aniline (CAS 88346-82-1)
- 6-Chloro-4-(trifluoromethyl)pyridazin-3-amine (CAS 1610008-47-3)
- 4-(3-Bromo-5-fluorobenzoyl)morpholine (CAS 1329457-16-0)
- 2-(2-Chlorophenyl)-5-phenyloxazole (CAS 22397-40-6)
- 2-Chloro-5H-pyrrolo[3,2-d]pyrimidine-6-carboxylic acid (CAS 1935150-77-8)
- Neuropeptide S (rat) (CAS 412938-75-1)
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