4-Hydroxy-2-methoxybenzoic acid CAS 90111-34-5
| CAS No. | 90111-34-5 |
| Molecular Formula | C8H8O4 |
| Molecular Weight | 168.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-Hydroxy-2-methoxybenzoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
4-Hydroxy-2-methoxybenzoic acid (CAS 90111-34-5), molecular formula C8H8O4 and molecular weight 168.15 g/mol, is a CATO reference standard with documented purity and traceability.
4-Hydroxy-2-methoxybenzoic acid (C8H8O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
Physical & Chemical Properties
| Molecular Formula | C8H8O4 |
| Molecular Weight | 168.15 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
Related Hydroxy Standards
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Recommended Standards
- 4-Hydrazinyl-2-methylpyrimidine-5-carboxylic acid (CAS 98135-49-0)
- 4-Methoxy-2-methyl-3-nitropyridine (CAS 78757-25-2)
- 4-Amino-N,2-dihydroxybenzamide (CAS 35352-91-1)
- 4-Methoxy-2-methyl-5-nitropyridine (CAS 789474-20-0)
- 7758-73-8 2H-1-Benzopyran-2-one, 5,7-dihydroxy-4-phenyl- 5,7-Dihydroxy-4-phenyl-2H-1-benzopyran-2-one (CAS 7758-73-8)
- L-ASPARTIC ACID MAGNESIUM SALT (CAS 18962-61-3)
- 2,5-Dinitrothiophene-3-boronic acid (CAS 2377608-57-4)
- N-(2-Furylmethyl)-N-(tetrahydrofuran-2-ylmethyl)propane-1,3-diamine (CAS 1242967-76-5)
- D-Mannosamine hydrochloride (CAS 5505-63-5)
- 2-Amino-6-(difluoromethyl)-5-hydroxynicotinaldehyde (CAS 1803697-95-1)
- (S)-Methyl 1-acetylpyrrolidine-3-carboxylate (CAS 648413-65-4)
- Ethyl 2-bromo-3,4-difluorobenzoate (CAS 1807172-17-3)
- 3-Oxopentanenitrile (CAS 33279-01-5)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com