Azazel also called Azazil is a demon of the second order, guardian of the goat. In islamic demonology is a Djin.
There are many meanings of Azazel. Some rabbis identify it as a cliff or a place of rocks. Others vision it as a supernatural power, perhaps composed of two fallen angels, Uza and Azael.
In Modern Hebrew, the expression “Go to Azazel” is the equivalent of “Go to Hell.”
In the Bible
This Hebrew term does not appear throughout the Bible, in this form. The word “goat” is in Ezra, in Daniel, in other parts of the book of Leviticus. The difference is that a term (Azazel) has connotations of “scapegoat” and in the other texts only “scapegoat”.
This ritual was performed on the Day of Atonement, which is Biblically described (Leviticus 16:8). “Aaron shall cast lots on two goats, one lot for the Lord and the other for Azazel”. The one on which the lot of the Lord fell was sacrificed. His blood served for expiration.
The High Priest then placed both of his hands on the head of the other. Confessed his sins and those of the people, charged the animal with them, and permitted him to be led into the desert and set free.
And the people, having left the care of their iniquities to the goat of Azazel-also known as the scapegoat returned to their homes with free consciences. The ritual also is in the avodah.
Other notable angels were Azrael, Fallen Angel, Uriel, Metatron and Abaddon.
Cavendish, Richard, The Black Arts, New York: Peigee Books, Berkley Publishing Group, 1967, pp. 285-286
Erich von Daniken <http://en.wikipedia.org/wiki/Von_Daniken>
Welcome to the World of Mysteries of Erich von Daniken <http://www.daniken.com/>
Spence, Lewis, An Encyclopedia of Occultism, New York, Carol Publishing Group Edition, 1996, p 57
Unger, Merrill F., Unger’s Bible Dictionary, Chicago, Moody Press, 1966, p. 117