2-Hydroxy-2-(4-hydroxyphenyl)acetic acid hydrate CAS 184901-84-6
| CAS No. | 184901-84-6 |
| Molecular Formula | C8H8O4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2-Hydroxy-2-(4-hydroxyphenyl)acetic acid hydrate (CAS 184901-84-6), molecular formula C8H8O4H2O and molecular weight 186.16 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Hydroxy-2-(4-hydroxyphenyl)acetic acid hydrate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 186.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C8H8O4 H2O |
| Molecular Weight | 186.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2009 |
Related Hydroxy Standards
- N-(4-Hydroxy-3-oxo-2,3-dihydro-1H-inden-5-yl)acetamide (CAS 1000333-88-9)
- 1-Benzyl-4-hydroxy-6-carbomoyl-5-azaindole (CAS 1000342-24-4)
- 3-Hydroxy-4-cyano (1H)Indazole (CAS 1000342-91-5)
- 6-Hydroxy-1,2-dihydro-3H-indazol-3-one (CAS 1000343-86-1)
- 3-Hydroxy-5-ethylisoxazole (CAS 10004-45-2)
- 2-(6-Hydroxy-2,3-dihydrobenzofuran-3-yl)acetic acid (CAS 1000414-37-8)
- (S)-(6-Hydroxy-2,3-dihydrobenzofuran-3-yl)acetic Acid Methyl Ester (CAS 1000414-38-9)
- 2-Hydroxy-2-phenyl-1-(1H-pyrrol-2-yl)ethanone (CAS 100063-06-7)
Recommended Standards
- 3-(dimethylamino)imidazo[1,5-a]pyridine-1-carbaldehyde (CAS 170145-26-3)
- 2-{3-methyl-1H-pyrazolo[3,4-b]pyridin-1-yl}acetic acid hydrochloride (CAS 2126159-93-9)
- (S)-Methyl 3-amino-3-(3-nitrophenyl)hexanoate hydrochloride (CAS 1363408-49-4)
- 2-[(6-Chloropyridin-3-yl)formamido]acetic acid (CAS 1099143-66-4)
- 5-[1-(2-Ethoxy-phenyl)-meth-(Z)-ylidene]-imidazolidine-2,4-dione (CAS 431978-07-3)
- N-Trifluoroacetyl Doxorubicin (CAS 26295-56-7)
- 3-((4-Fluorobenzyl)oxy)-2-methyl-4H-pyran-4-one (CAS 338956-74-4)
- (R)-3-(pyrrolidin-2-yl)propanoic acid (CAS 734516-72-4)
- Ethyl 4-tert-butyl-2-hydroxybenzoate (CAS 1415560-72-3)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
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