There are many recipes for hot sauces but the only common ingredient is some variety of chili pepper. Many hot sauces are made by using chili peppers as the base and can be as simple as adding salt and vinegar while other sauces use some type of fruits or vegetables as the base and add the chili peppers to make them hot. Manufacturers use many different processes from aging in containers, to pureeing and cooking the ingredients to achieve a desired flavor.
A thin and potent Mexican chili pepper also known as bird's beak chile and rat's tail chile. Their heat index uses to be between 15,000 and 30,000 Scoville units, but it can reach over 100,000 units.
The Scoville scale is a measurement of the pungency (spicy heat) of chili peppers—or other spicy foods, as reported in Scoville heat units (SHU). a function of capsaicin concentration. Capsaicin is one of many related active components found in chili peppers, collectively called capsaicinoids. The scale is named after its creator, American pharmacist Wilbur Scoville. His method, devised in 1912, is known as the Scoville Organoleptic Test.