3,4-Dihydroxybenzoic Acid CAS 99-50-3
| CAS No. | 99-50-3 |
| Molecular Formula | C7H6O4 |
| Molecular Weight | 154.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3,4-Dihydroxybenzoic Acid (CAS 99-50-3) is a high-purity analytical reference standard with the molecular formula C7H6O4 and a molecular weight of 154.12 g/mol.
Based on its molecular formula C7H6O4, 3,4-Dihydroxybenzoic Acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 154.12 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).
As a certified reference material (CRM), 3,4-Dihydroxybenzoic 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.
Physical & Chemical Properties
| Molecular Formula | C7H6O4 |
| Molecular Weight | 154.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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.) | 1957 |
Related Dihydroxybenzoic Standards
- 2,3-Dihydroxybenzoic Acid (CAS 303-38-8)
- 2,4-Dihydroxybenzoic Acid (CAS 89-86-1)
- 2,5-Dihydroxybenzoic Acid-d3 (d2 Major) (CAS 294661-02-2)
- 5-Ethyl-2,3-dihydroxybenzoic acid (CAS 100245-32-7)
- 2-Ethyl-4,6-dihydroxybenzoic acid (CAS 4299-73-4)
- 2,5-DIhydroxybenzoic acid butylamine salt (CAS 666174-80-7)
- 2,5-Dihydroxybenzoic Acid Sodium Salt (CAS 4955-90-2)
- 3,4-Dihydroxybenzoic Acid 3-O-β-D-Glucuronide (CAS 953037-17-7)
Recommended Standards
- 4-Amino-3-Nitrophenol (CAS 610-81-1)
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