A .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile written confirmation (.alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile WC) is an official document issued by a regulatory agency to a .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile manufacturer, verifying that the manufacturing facility of a .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile active pharmaceutical ingredient (API) adheres to the Good Manufacturing Practices (GMP) regulations of the importing country. When exporting .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile APIs or .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile finished pharmaceutical products to another nation, regulatory agencies frequently require a .alpha.,.alpha.',.alpha.'-tetramethyl-5(1H-1,2,4-triazol-1-ylmethyl)-m-benzenediacetonitrile WC (written confirmation) as part of the regulatory process.
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