Benzenesulfonic acid, 2,5-dihydroxy-, calcium salt, hydrate (2:1:?) CAS 117552-78-0
| CAS No. | 117552-78-0 |
| Molecular Formula | 2*C6H5O5S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Benzenesulfonic acid, 2,5-dihydroxy-, calcium salt, hydrate (2:1:?) (C6H5O5SCax*H2O) contains a carbohydrate-derived structure, a sulfone group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Benzenesulfonic acid, 2,5-dihydroxy-, calcium salt, hydrate (2:1:?) (CAS 117552-78-0), molecular formula C6H5O5SCax*H2O and molecular weight 247.25 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | 2*C6H5O5S Ca x*H2O |
| Molecular Weight | 247.25 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) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Sulfur Atoms | 1 |
Related Benzenesulfonic Standards
- Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[4-(sulfophenyl)-2H-1,2,3-triazol-2-yl]-, sodium salt (1:x) (CAS 106906-28-9)
- Benzenesulfonic acid, 4,4',4'',4'''-[carbonylbis[imino-5,1,3-benzenetriylbis(carbonylimino)]]tetrakis-, tetrasodium salt (CAS 111150-22-2)
- Benzenesulfonic Acid Impurity 4 (CAS 116-50-7)
- Benzenesulfonic acid, 4-[(2-methyl-2-propen-1-yl)oxy]-, sodium salt (CAS 1208-67-9)
- Benzenesulfonic Impurity 3 (CAS 1352414-81-3)
- Benzenesulfonic Impurity 2 (CAS 1352414-88-0)
- Benzenesulfonic acid, (acetylamino)- (CAS 138721-63-8)
- Benzenesulfonic acid, 4-dodecyl-, ammonium salt (CAS 14356-33-3)
Recommended Standards
- (1E,4E)-1-(4-Hydroxy-3-methoxyphenyl)-5-(3,5,6-trimethylpyrazin-2-yl)penta-1,4-dien-3-one (CAS 1881270-27-4)
- SCS (CAS 3232-36-8)
- 3-(Methylthio)isothiazol-5-amine (CAS 67209-07-8)
- 1-(Difluoromethyl)-4-(4-methoxyphenoxy)benzene (CAS 2149601-35-2)
- 1-[3-ethyl-4-(hydroxymethyl)phenyl]ethan-1-one (CAS 1378888-43-7)
- Boc-DL-beta-Leucine (CAS 248924-39-2)
- hexahydro-2H-1$l^{6},5-[1$l^{6}]thieno[2,3-c]pyrrole-1,1-dione hydrochloride (CAS 1172964-41-8)
- 4-Methylbicyclo[2.2.2]octane-1-carboxylic acid (CAS 702-67-0)
- 6-oxo-6-(piperidin-1-yl)hexanoic acid (CAS 1862-16-4)
- Tirzepatide Impurity 45 (CAS CATO-C4X-324045)
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