4-Chloro-2-methylbutanoic acid CAS 672305-40-7
| CAS No. | 672305-40-7 |
| Molecular Formula | C5H9ClO2 |
| Molecular Weight | 136.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Chloro-2-methylbutanoic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies 4-Chloro-2-methylbutanoic acid (CAS 672305-40-7), a certified reference material (molecular formula C5H9ClO2, MW 136.58 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 4-Chloro-2-methylbutanoic acid is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 136.58 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.
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 | C5H9ClO2 |
| Molecular Weight | 136.58 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- Methyl 3-chloro-2-methylpropanoate (CAS 10317-11-0)
- 3-chloro-2-(methoxymethoxy)prop-1-ene (CAS 105104-40-3)
- 3-Chloro-5-hydroxy-2-pentanone (CAS 13045-13-1)
- (S)-2-Chloro-3-methylbutyric Acid (CAS 26782-74-1)
- 1-Chloro-3-ethoxypropan-2-one (CAS 69378-63-8)
- 1-Chloro-4-methoxybutan-2-one (CAS 87308-03-0)
- 3-chloro-1,2,4-triazin-5-amine (CAS 57857-38-2)
- 3-Chloro-3-methylbutanoic Acid (CAS 60786-20-1)
Recommended Standards
- 3-Ethoxypropanoyl chloride (CAS 49775-37-3)
- 4-Methoxybutanoyl chloride (CAS 61882-39-1)
- 5-(Chloromethyl)-1,3-dioxane (CAS 61728-98-1)
- 2-Hydroxy-2-methylbutyroyl chloride (CAS 876944-75-1)
- 3,9-dioxa-7-azabicyclo[3.3.1]nonane hydrochloride (CAS 1803587-96-3)
- 4-Chloro-2-ethoxybenzonitrile (CAS 548473-74-1)
- 2-(2-Ethylphenyl)-4-oxo-1,4-dihydroquinoline-6-carboxylic acid (CAS 90034-28-9)
- Dioctadecylmethylamine (CAS 4088-22-6)
- 2-Chloro-5-fluorophenylboronic Acid (CAS 444666-39-1)
- Tenofovir disoproxil Impurity 20 (CAS CATO-C4X-107620)
- Diclofenac Impurity 20 (CAS 60805-31-4)
- N-(2,4-dibromophenyl)-2-methoxybenzamide (CAS 540792-53-8)
- 5-Methyl-4-{7-methylimidazo[1,2-a]pyridin-2-yl}-1,2-oxazole (CAS 478245-87-3)
- Semaglutide impurity 41 (CAS CATO-C4X-222641)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com