Purex® Ultra Dry powder detergent penetrates deep into fabric fibers with the cleaning power to leave your whites whiter and your colors brighter. Ultra formula uses biodegradable cleaning agents and is safe for septic systems. Application: Laundry Detergent; Applicable Material: Fabric; Dirt Types: Food Stains; Grass Stains; Grease; Oil-Based Soil; Organic Matter; Water-Based Soil; Scent: Fresh Spring Waters™.