Sodium 4-hydroxy-5-(4-methylphenylsulfonamido)naphthalene-2,7-disulfonate CAS 17618-71-2

Description

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

Sodium 4-hydroxy-5-(4-methylphenylsulfonamido)naphthalene-2,7-disulfonate (CAS 17618-71-2), molecular formula C17H13NO9S3Na and molecular weight 494.46 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, Sodium 4-hydroxy-5-(4-methylphenylsulfonamido)naphthalene-2,7-disulfonate (C17H13NO9S3Na) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 494.46 g/mol, it falls into the moderately-high-molecular-weight range. 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).

As a certified reference material (CRM), Sodium 4-hydroxy-5-(4-methylphenylsulfonamido)naphthalene-2,7-disulfonate 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.

Physical & Chemical Properties

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