Object of Purchase

• Goods purchased: Liquid sodium permanganate (oxidizer), intended for the preparation of drinking water from surface water.
• Main technical requirements:
  • Concentration in terms of $\text{NaMnO}_4$: $39 - 41%$.
  • $\text{pH}$ of $1%$ solution ($25^\circ\text{C}$): $5.0 - 9.0$.
  • Insoluble compounds: $\le 0.009%$.
  • Stability: $\ge 18$ months.
  • Volumetric density: $1.36 - 1.39 \text{ g/cm}^3$.
  • State: Dark purple liquid.
  • The supplier must provide documents corresponding to the…
     
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