Pancreatic Digest of Casein
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
(a bacteriological peptone; Tryptone) - A grayish-yellow powder, having a characteristic, but not putrescent, odor. Freely soluble in water; insoluble in alcohol and in ether.
Loss on Drying 〈731〉
Analysis: Dry at 100° to constant weight.
Acceptance criteria: NMT 7.0%
Residue on Ignition 〈281〉
Analysis: Ignite 500 mg with 1 mL of sulfuric acid.
Acceptance criteria: NMT 75 mg (15%)
Microbial Content: NMT 104 cfu/g
Nitrogen Content (Reagent test)
Analysis: Determine by the Kjeldahl method.
Acceptance criteria: 9.0%–14.0% is found
Amino Nitrogen: 3.5%–7.0%
