2-(5-Chloro-2-hydroxyphenoxy)acetic acid CAS 328104-87-6
| CAS No. | 328104-87-6 |
| Molecular Formula | C8H7ClO4 |
| Molecular Weight | 202.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2-(5-Chloro-2-hydroxyphenoxy)acetic acid (C8H7ClO4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 202.59 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
2-(5-Chloro-2-hydroxyphenoxy)acetic acid (CAS 328104-87-6), molecular formula C8H7ClO4 and molecular weight 202.59 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.
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 | C8H7ClO4 |
| Molecular Weight | 202.59 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; 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.) | 2025 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 2-Chloro-1-(2,4,6-trihydroxyphenyl)ethanone (CAS 110865-03-7)
- 3-Chloro-2-hydroxy-5-methoxybenzoic acid (CAS 1245532-48-2)
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Recommended Standards
- 2-(4-Chloro-2-hydroxyphenoxy)acetic acid (CAS 7417-89-2)
- 3-Chloro-4-hydroxy-5-methoxybenzoic acid (CAS 62936-23-6)
- 2-(3-Chloro-4-hydroxyphenyl)-2-hydroxyacetic acid (CAS 72198-15-3)
- 4-Chloro-1-(difluoromethoxy)-2-ethynylbenzene (CAS 2228802-29-5)
- 1-(2-bromo-4-methoxyphenyl)ethan-1-ol (CAS 89691-60-1)
- 8-(4-Fluorophenyl)-8-oxooctanenitrile (CAS 898767-15-2)
- Indole-3-butyryl-L-phenylalanine (CAS 1008303-39-6)
- (1H-benzo[d][1,2,3]triazol-1-yl)(pyridin-2-yl)methanone (CAS 144223-29-0)
- (S)-Sulforaphane, 98% (CAS 155320-20-0)
- CGP 20712 Dihydrochloride (CAS 1216905-73-5)
- (1A,2A,4A,5A,7A)-7-[(Hydroxydi-2-thienylacetyl)oxy]-9,9-dimethyl-3-oxa-9-azoniatri-cyclo[3.3.1.02.4]nonane bromide (1a,2,4,5a,7)-7-[(2-Hydroxy-2,2-di-2-thienylacetyl)oxy]-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonane bromide 186691-13-4 7-((Hydroxybis(2-thienyl)acetyl)oxy)-9,9-dimethyl-3-oxa-9-azoniatricyclo(3.3.1.0(2,4))nonane bromide 7-{[hydroxy(dithiophen-2-yl)acetyl]oxy}-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonane bromide BA 679 BR BA 679BR BA-679 BR BA-679-BR D0P1WA Spiriva Spiriva (TN) Spiriva Handihaler Spiriva Respimat TIOTROPIUM BROMIDE Tiotropium Tiotropium bromide [USAN:INN] (CAS 186691-13-4)
- 3-(1-Phenyl-3-p-tolyl-1H-pyrazol-4-yl)-acrylic acid (CAS 108446-74-8)
- 5-Methyl-4-nitrothiophene-2-sulfonyl chloride (CAS 61714-77-0)
- D-Ile17-Tirzepatide (CAS CATO-CPTD788917)
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