2-Hydroxy-4-sulfobenzoic acid CAS 585-42-2
| CAS No. | 585-42-2 |
| Molecular Formula | C7H6O6S |
| Molecular Weight | 218.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Hydroxy-4-sulfobenzoic acid is closely related to a carbohydrate-derived structure, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-Hydroxy-4-sulfobenzoic acid (CAS 585-42-2) is a high-purity analytical reference standard with the molecular formula C7H6O6S and a molecular weight of 218.18 g/mol.
Owing to a carbohydrate-derived structure, a sulfone group, 2-Hydroxy-4-sulfobenzoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 218.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C7H6O6S |
| Molecular Weight | 218.18 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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 |
| Sulfur Atoms | 1 |
Related Hydroxy Standards
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Recommended Standards
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- 2-Amino-n-(2,2,2-trifluoroethyl)benzamide (CAS 869629-11-8)
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- 5-(1,2-Dimethylhydrazinyl)-3,4-dimethylisoxazole (CAS 85053-79-8)
- Methyl 2-chloro-4-morpholinopyrido[2,3-d]pyrimidine-7-carboxylate (CAS 1227958-54-4)
- 4-Amino-3-bromo-5-fluorobenzamide (CAS 1357943-94-2)
- 1-(2-Amino-4-chlorophenyl)piperidin-4-ol (CAS 953717-74-3)
- N-Methyl-1-(3-methyl-1,2,4-oxadiazol-5-yl)methanamine hydrochloride (CAS 1573547-16-6)
- 3-Chloro-2,4,5,6-tetrafluorobenzotrifluoride (CAS 4284-09-7)
- GnRH Associated Peptide (GAP) (1-13), human (CAS 100111-07-7)
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