For Moroccan food processors in Agadir and Marrakech, Caustic Soda Morocco must meet food-grade standards: 99% minimum purity, <0.5% sodium carbonate, and heavy metals below 10 ppm, with Certificates of Analysis compliant with EU and US FCC standards. For municipal water treatment, 98-99% industrial-grade is standard, requiring IMANOR conformity marks and batch traceability under Moroccan water law 36-15.