5-Ethyl-2,3-dihydroxybenzoic acid CAS 100245-32-7
| CAS No. | 100245-32-7 |
| Molecular Formula | C9H10O4 |
| Molecular Weight | 182.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Ethyl-2,3-dihydroxybenzoic acid (C9H10O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, 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 182.17 g/mol, it falls into the medium-molecular-weight range. 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).
5-Ethyl-2,3-dihydroxybenzoic acid (CAS 100245-32-7), molecular formula C9H10O4 and molecular weight 182.17 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.
As a certified reference material (CRM), 5-Ethyl-2,3-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 | C9H10O4 |
| Molecular Weight | 182.17 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.) | 1985 |
Related Ethyl Standards
- 2-Ethyl-4,6-dihydroxybenzoic acid (CAS 4299-73-4)
- 2,5-Dihydroxybenzoic Acid-d3 (d2 Major) (CAS 294661-02-2)
- 2,3-Dihydroxybenzoic Acid (CAS 303-38-8)
- 2,4-Dihydroxybenzoic Acid (CAS 89-86-1)
- 3,4-Dihydroxybenzoic Acid (CAS 99-50-3)
- 3,4-Dihydroxybenzoic Acid 3-O-β-D-Glucuronide (CAS 953037-17-7)
- 2,5-DIhydroxybenzoic acid butylamine salt (CAS 666174-80-7)
- 2,5-Dihydroxybenzoic Acid Sodium Salt (CAS 4955-90-2)
Recommended Standards
- D-[1-18O]glucose (CAS 3343-70-2)
- 2-(2-Hydroxy-4-methylphenoxy)acetic acid (CAS 1022729-31-2)
- alpha-(Trifluoromethyl)thiophene-3-methanol (CAS 394203-57-7)
- 5-(Hydroxymethyl)-2-methoxybenzoic acid (CAS 10286-57-4)
- 2-(2-(Difluoromethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 960067-33-8)
- 3-(5-Methyl-1H-indol-3-yl)-3-oxopropanenitrile (CAS 1020091-70-6)
- 3-Fluoro-4-hydroxy-5-methoxybenzoic acid (CAS 773870-27-2)
- Pyronaridine Impurity 3 (CAS CATO-C4X-29783)
- N-(4-Chlorophenyl)-2-hydroxybenzamide (CAS 3679-63-8)
- (R)-2,2,2-trifluoro-1-(4-fluoro-3-methylphenyl)ethan-1-amine (CAS 1213006-57-5)
- 4-(P-tolyl)but-3-en-2-one (CAS 4023-84-1)
- (1S,2R,3S,4R)-1-cyanopentane-1,2,3,4,5-pentayl pentaacetate (CAS 35439-42-0)
- Tert-butyl 3-bromo-1H-pyrazolo[4,3-c]pyridine-1-carboxylate (CAS 1286753-97-6)
- Peptide Impurity 09 X TFA Salt (CAS CATO-CPTD788809)
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