It's color-safe, septic-safe, and environmentally safe - good news for you, bad news for stains and odors. This chlorine-free Oxygen Whitener releases a boost of oxygen for bleaching stains, while cleaning and brightening colors and whites. And just like all Nellie's products, it's biodegradable and hypoallergenic. 2.2lbs. Use with Nellie's Laundry Nuggets for a super clean load of all your clothes, sheets and towels.