Tryptone Soya Agar EP/USP/JP/BP (Dehydrated) GroTryptone Soya Agar, also known as Casein Soya Bean Digest Agar, is a general purpose medium specified in pharmacopoeia and food testing methods for the growth of a wide variety of organisms. The product is tested to the pharmacopoeia2, 3, 4, 5 and is mainly used as reference medium when testing selective media. Recommended as a reference medium for testing selective media Conforms to formulations detailed in the International pharmacopoeiae the degree of inhibition1.