William Colgate (January 25, 1783 – March 25, 1857) was an English-American soap industrialist who founded in 1806 what became the Colgate-Palmolive company.

William Colgate, a devout Baptist English immigrant soap and candle maker established in 1806 a starch, soap, and candle factory on Dutch Street in New York City under the name William Colgate & Company.

In 1833, he suffered a severe heart attack, stopping his business's sales; after a convalescence he continued with his business. In the 1840s, the company began selling individual cakes of soap in uniform weights. In 1857, Colgate died and the company was reorganized as Colgate & Company under the management of his devout Baptist son Samuel Colgate, who did not want to continue the business but thought it would be the right thing to do. In 1872, he introduced Cashmere Bouquet, a perfumed soap.

In 1873, the company introduced its first Colgate Toothpaste, an aromatic toothpaste sold in jars.

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