2,2 inverted exclamation marka-[2,2 inverted exclamation marka-Oxybis(ethane-2,1-diyl)bis(oxy)]diethanethiol 2781-02-4 Diethylene glycol di(ethanethiol) Tetra(ethylene glycol) dithiol CAS 2781-02-4
| CAS No. | 2781-02-4 |
| Molecular Formula | C8H18O3S2 |
| Molecular Weight | 226.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2,2 inverted exclamation marka-[2,2 inverted exclamation marka-Oxybis(ethane-2,1-diyl)bis(oxy)]diethanethiol 2781-02-4 Diethylene glycol di(ethanethiol) Tetra(ethylene glycol) dithiol.
2,2 inverted exclamation marka-[2,2 inverted exclamation marka-Oxybis(ethane-2,1-diyl)bis(oxy)]diethanethiol 2781-02-4 Diethylene glycol di(ethanethiol) Tetra(ethylene glycol) dithiol (CAS 2781-02-4), molecular formula C8H18O3S2 and molecular weight 226.36 g/mol, is a CATO reference standard with documented purity and traceability.
2,2 inverted exclamation marka-[2,2 inverted exclamation marka-Oxybis(ethane-2,1-diyl)bis(oxy)]diethanethiol 2781-02-4 Diethylene glycol di(ethanethiol) Tetra(ethylene glycol) dithiol (C8H18O3S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
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 | C8H18O3S2 |
| Molecular Weight | 226.36 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 0.0 |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 2 |
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