2',3',5',6'-Tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid CAS 1119195-99-1
| CAS No. | 1119195-99-1 |
| Molecular Formula | C26H22O8 |
| Molecular Weight | 462.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2',3',5',6'-Tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic 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.
2',3',5',6'-Tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid (CAS 1119195-99-1), molecular formula C26H22O8 and molecular weight 462.45 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, 2',3',5',6'-Tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 462.45 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C26H22O8 |
| Molecular Weight | 462.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
Related Tetramethyl Standards
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