Tetramethyl 5,5'-(((5-hydroxy-1,3-phenylene)bis(methylene))bis(oxy))diisophthalate CAS 186605-76-5

Description

The occurrence of Tetramethyl 5,5'-(((5-hydroxy-1,3-phenylene)bis(methylene))bis(oxy))diisophthalate is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Tetramethyl 5,5'-(((5-hydroxy-1,3-phenylene)bis(methylene))bis(oxy))diisophthalate (CAS 186605-76-5), molecular formula C28H26O11 and molecular weight 538.50 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, Tetramethyl 5,5'-(((5-hydroxy-1,3-phenylene)bis(methylene))bis(oxy))diisophthalate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 538.50 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.

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

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