Arm & Hammer is a brand of baking soda-based consumer products marketed by Church & Dwight, a major American manufacturer of household products.

Arm and Hammer started as John Dwight and Company in 1846 when John Dwight and Austin Church used their sodium bicarbonate in their kitchen. They formerly made the COW BRAND trademark on their baking soda.

In 1886, Austin retired and his 2 sons succeeded in selling Arm and Hammer Baking Soda through their name Church and Co as a competing company to the John Dwight Company which continues selling COW BRAND baking soda. The Church & Dwight Company was formed when the two were merged.

In 1972, they innovated and their bicarbonate of soda began being used as a deodorizer for the refrigerator and freezer. When used in this capacity, the container of bicarbonate of soda must be changed monthly.

The logo of the brand depicts the ancient symbol of a muscular arm holding a hammer inside a red circle with the brand name and slogan.

Originally associated solely with baking soda and washing soda, the company began to expand the brand to other products in the 1970s by using baking soda as a deodorizing ingredient. The new products included toothpaste, laundry detergent, underarm deodorant, and cat litter.

According to and en. Wikipedia. Source of photos: internet