3c440 | — | L-tryptophan | Additive compositionPowder with a minimum of 98 % L-tryptophan (on a dry matter basis).Maximum content of 10 mg/kg 1,1′-ethylidene-bis-L-tryptophan (EBT)Characterisation of the active substanceL-tryptophan produced by fermentation with Escherichia coli KCCM 11132P orEscherichia coli DSM 25084 orEscherichia coli FERM BP-11200 orEscherichia coli FERM BP-11354 orEscherichia coli CGMCC 7.59 orEscherichia coli CGMCC 3667.Chemical formula: C11H12N2O2CAS No: 73-22-3Analytical methodsFor the identification of L-tryptophan in the feed additive:- Food Chemical Codex "L-tryptophan monograph".
For the determination of tryptophan in the feed additive and premixtures:- High performance liquid chromatography coupled to fluorescence detection (HPLC-FD) — EN ISO 13904-2016
For the determination of tryptophan in the feed additive, premixtures, compound feed and feed materials:- High Performance Liquid Chromatography (HPLC) coupled with fluorescence detection, Commission Regulation (EC) No 152/2009 (OJ L 54, 26.2.2009, p. 1) (Annex III, G)
| All species | — | — | — | 1.L-tryptophan may be placed on the market and used as an additive consisting of a preparation.2.For users of the additive and premixtures, feed business operators shall establish operational procedures and organisational measures to address potential risks by inhalation, dermal contact or eyes contact. Where those risks cannot be eliminated or reduced to a minimum by such procedures and measures, the additive and premixtures shall be used with personal protective equipment, including breathing protection, safety glasses and gloves.3.The endotoxin content of the additive and its dusting potential shall ensure a maximal endotoxin exposure of 1600 IU endotoxins/m3 air.4.For ruminants, L-tryptophan shall be rumen protected.5.Declarations to be made on the label of the additive:Moisture content. | 12 June 2027 |