Tex-423-a Fix Jun 2026

TxDOT utilizes Tex-423-A as a quality control gate. If a direct measurement indicates the pavement is deficient by more than from the plan thickness, further verification is required—often through coring according to Test Method Tex-424-A .

The Tex-423-A procedure is divided into distinct parts to address various construction scenarios: tex-423-a

For the past six weeks, a single alphanumeric string has appeared with increasing frequency across restricted defense forums, chemical safety bulletins, and patent watchdogs: . TxDOT utilizes Tex-423-A as a quality control gate

To perform the test accurately, the following specialized tools are required: To perform the test accurately, the following specialized

: The procedure uses a rigid steel rod with a blunted tip and a standard tape measure to determine depth to the nearest 1 mm (1/16 in.).

Even high-purity batches of TEX-423-A can present challenges. Here are solutions to frequently encountered problems:

University laboratories frequently utilize TEX-423-A as a model substrate in mechanistic studies of nucleophilic aromatic substitution (SNAr). Its well-defined spectroscopic profile (distinct ¹H NMR signals at δ 7.42 and 8.21 ppm) makes it an ideal reference for method development.