4-(Chlorophenyl)acetic acid tert-butyl ester CAS 33155-59-8
| CAS No. | 33155-59-8 |
| Molecular Formula | C12H15ClO2 |
| Molecular Weight | 226.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(Chlorophenyl)acetic acid tert-butyl ester (CAS 33155-59-8), molecular formula C12H15ClO2 and molecular weight 226.70 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C12H15ClO2, 4-(Chlorophenyl)acetic acid tert-butyl ester contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 226.70 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C12H15ClO2 |
| Molecular Weight | 226.70 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
Related Chlorophenyl Standards
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- N-(2-{[(4-chlorophenyl)methyl]amino}ethyl)acetamide (CAS 1042538-09-9)
- 4-(4-chlorophenyl)-3,3-dimethylbutanoic acid (CAS 1089303-25-2)
- 2-((1-(4-Chlorophenyl)ethyl)amino)-N-methylacetamide (CAS 1095519-82-6)
- 3-(4-chlorophenyl)-4-methylpentanoic acid (CAS 126275-16-9)
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Recommended Standards
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- 4-(Pentyloxy)benzoyl chloride (CAS 36823-84-4)
- 3-(4'-Butylphenylthio)-1,1,1-Trifluoropropan-2-One (CAS 99541-30-7)
- 1-[3-(aminomethyl)phenyl]-3,3-dimethylurea hydrochloride (CAS 903558-70-3)
- 5-(3-Chlorophenyl)pent-4-yn-1-ol (CAS 500709-36-4)
- 4-((4-((2-Methoxyethyl)carbamoyl)phenyl)amino)-4-oxobutanoic acid (CAS 940469-63-6)
- Flupirtine-D4 Hydrochloride (CAS 1324717-75-0)
- 3-Chloro-2-fluoro-6-(2-methylpropoxy)pyridine (CAS 1881295-04-0)
- Potassium 2-(4-methylpyridin-2-yl)acetate (CAS 1251919-65-9)
- ((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(di(naphthalen-1-yl)methanol) (CAS 137536-94-8)
- N-(5,6-Dimethoxybenzo[d]thiazol-2-yl)-5-(4-methoxyphenyl)-1,3,4-oxadiazol-2-amine (CAS 891084-73-4)
- Peptide YY (3-36) (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 126339-09-1)
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