NZP manufacture a range of different bile salts which are used across multiple applications.
Sodium cholate and sodium deoxycholate are the sodium salts of cholic acid and deoxycholic acid, offered as single products.
Bile Salts No. 3 is a mixture of the two salts, sodium cholate and sodium deoxycholate, which was developed specifically for microbiological applications.
Special Bile is a refined bile product containing the natural conjugated bile acids and is used as a selective inhibitory agent in microbiological media. It differs from Ox Bile Extract in several ways especially by being a purer mixture of the conjugated bile acids, that is, it contains very little of the normal non-bile acid fraction found in Ox Bile Powder. Special Bile is the preferred for media such as MacConkey broth and agar, Brilliant Green Bile Broth and EE Broth.
Further information is available here.