Chloroheptamethylcyclotetrasiloxane CAS 18297-88-6
| CAS No. | 18297-88-6 |
| Molecular Formula | C7H21ClO4Si4 |
| Molecular Weight | 317.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Chloroheptamethylcyclotetrasiloxane is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Chloroheptamethylcyclotetrasiloxane (CAS 18297-88-6) is a high-purity analytical reference standard with the molecular formula C7H21ClO4Si4 and a molecular weight of 317.03 g/mol.
The molecular framework of Chloroheptamethylcyclotetrasiloxane (C7H21ClO4Si4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Chloroheptamethylcyclotetrasiloxane under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H21ClO4Si4 |
| Molecular Weight | 317.03 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 | Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | -3.0 |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
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