Definition of reagent grade in English:

reagent grade

noun

Chemistry
  • [mass noun] A grade of commercial chemicals of a high standard of purity suitable for use in chemical analysis.

    • ‘All other chemical reagents were reagent grade or better.’
    • ‘Other reagents were commercial products of reagent grade.’
    • ‘All chemicals used were reagent grade or of highest quality available.’
    • ‘The other chemicals were of analytical reagent grade.’
    • ‘All chemicals were of reagent grade and were used without further purification.’