In the 1933 list of pharmaceutical specialties (Gehes Codex) Bakteriologe Lipp does not list the composition of its reagents: in later editions, some such information does appear. Albucit (the resorcinol dye) darkens in the presence of protein; Sanguicit, containing azobenzol, turns blue if blood is present in urine or in faeces; when Pyocit (of uncertain composition) is used, the thickness of foam suggests the amount of pus in urine. Testing for bilirubin involves shaking the urine sample with a spoonful of Bilirucit (toluidine): as the amount of bilirubin grows, the mixture changes color to green and then red.