Purex is a brand of laundry detergent and laundry-related products manufactured by Henkel North American Consumer Goods and marketed in the United States and Canada.

The brand name is also used for a line of in-wash "fragrance booster" products called Purex Crystals.

In 1922, Lionel S. Precourt and his son, Ray, began to make household bleach from their 400-square-foot (37 m2) garage behind their family home in Los Angeles, California.

By 1946, Purex[clarification needed] began to produce its first light-duty, dry detergent, under the brand name Trend.

In 1981, Purex acquired the food and household brands of A. E. Staley Manufacturing Company, among them, Cream Corn Starch, Staley Pancake and Waffle Syrup, Sta-Puf fabric softener, Sta-Flo liquid starch and Sno Bol toilet bowl cleaner.