Deep cleaning power. The deep cleaning power of Electrasol powder gently removes tough food stains. Approved by leading dishwasher manufacturers. Electrasol is safe for septic systems. Phosphorus Content: The Electrasol formula average 4.5% phosphorus, in the form of phosphates, which is equivalent to 0.72 grams per tablespoon use level. Approved by leading dishwasher manufacturers. Made in U.S.A.