Category of nutritional additives. Functional group: amino acids, their salts and analogues3c301 | | DL-methionine, technically pure | - Additive compositionMethionine content: minimum 99 %
- Characterisation of the active substanceIUPAC name: 2-amino-4-(methylthio)butanoic acidCAS number: 59-51-8Chemical formula: C5H11NO2S
- Analytical methodsFor the determination of methionine in the additives:
- Ion exchange chromatography coupled with post-column derivatisation and photometric or fluorescence detection (HPLC-UV/FD) - ISO/DIS 17180.
For the determination of methionine in premixtures, compound feed, feed materials and water:- Ion exchange chromatography coupled with post-column derivatisation and photometric detection (HPLC-UV) - Commission Regulation (EC) No 152/2009 (Annex III, F).
| all animal species | | | | - 1.DL-methionine, technically pure can be also used via water for drinking.
- 2.Declarations to be made on the labelling of the additive and premixtures:"If the additive is administered via water for drinking protein excess should be avoided."
| 12 June 2023 |
3c302 | | Sodium DL-methionine, liquid | - Additive compositionDL-Methionine content: minimum 40 %Sodium: minimum 6,2 %Water: maximum 53,8 %
- Characterisation of the active substanceIUPAC name: 2-amino-4-(methylthio)butanoic acid sodium saltCAS number: 41863-30-3Chemical formula: (C5H11NO2S)Na
- Analytical methodsFor the determination of methionine in the additives:
- Ion exchange chromatography coupled with post-column derivatisation and photometric or fluorescence detection (HPLC-UV/FD) - ISO/DIS 17180.
For the determination of methionine in premixtures, compound feed, feed materials and water:- Ion exchange chromatography coupled with post-column derivatisation and photometric detection (HPLC-UV) - Commission Regulation (EC) No 152/2009 (Annex III, F).
| all animal species | | | | - 1.For user safety: breathing protection, safety glasses and gloves should be worn during handling.
- 2.Sodium DL-methionine, liquid can be also used via water for drinking.
- 3.Declarations to be made on the labelling of the additive and premixtures:
- DL-Methionine content,
- "If the additive is administered via water for drinking protein excess should be avoided."
| 12 June 2023 |
3c303 | | DL-methionine protected with copolymer vinylpyridine/styrene | - Additive compositionPreparation withDL-Methionine: minimum 74 %Stearic acid: maximum of 19 %Copolymer poly(2-vinylpyridine) co-styrene: maximum 3 %Ethylcellulose and sodium stearate: maximum 0,5 %
- Characterisation of the active substanceIUPAC name: 2-amino-4-(methylthio)butanoic acidCAS number: 59-51-8Chemical formula: C5H11NO2S
- Analytical methodsFor the determination of methionine in the additives:
- Ion exchange chromatography coupled with post-column derivatisation and photometric or fluorescence detection (HPLC-UV/FD) - ISO/DIS 17180.
For the determination of methionine in premixtures, compound feed and feed materials:- Ion exchange chromatography coupled with post-column derivatisation and photometric detection (HPLC-UV) - Commission Regulation (EC) No 152/2009 (Annex III, F).
| Ruminants | | | | | 12 June 2023 |
3c304 | | DL-methionine protected with ethylcellulose | - Additive compositionPreparation withDL-Methionine: minimum 85 %Ethylcellulose: maximum 4 %Starch: maximum 8 %Sodium aluminium silicate: maximum 1,5 %Sodium stearate: maximum 1 %Water: maximum 2 %
- Characterisation of the active substanceIUPAC name: 2-amino-4-(methylthio)butanoic acidCAS number: 59-51-8Chemical formula: C5H11NO2S
- Analytical methodsFor the determination of methionine in the additives:
- Ion exchange chromatography coupled with post-column derivatisation and photometric or fluorescence detection (HPLC-UV/FD) - ISO/DIS 17180.
For the determination of methionine in premixtures, compound feed and feed materials:- Ion exchange chromatography coupled with post-column derivatisation and photometric detection (HPLC-UV) - Commission Regulation (EC) No 152/2009 (Annex III, F).
| Ruminants | | | | | 12 June 2023 |
3c307 | — | Hydroxy analogue of methionine | - Additive compositionHydroxy analogue of methionine: minimum 88 %Water: maximum 12 %
- Characterisation of the active substanceIUPAC name: 2-hydroxy-4-(methylthio)butanoic acidCAS number 583-91-5Chemical formula: C5H10O3S
- Analytical methodsFor the determination of hydroxy analogue of methionine in the additive:
- Titrimetry, potentiometric titration followed by oxidation reduction reaction.
For the determination of hydroxy analogue of methionine in premixtures, compound feed, feed materials and water:- High-Performance Liquid Chromatography and photometric detection (HPLC-UV).
| All animal species | — | — | — | - 1.For user safety: breathing protection, safety glasses and gloves should be worn during handling.
- 2.Hydroxy analogue of methionine can be also used via water for drinking.
- 3.Declarations to be made on the labelling of the additive and premixtures:
- "If the additive is administered via water for drinking protein excess should be avoided."
- 4.Declarations to be made on the labelling of feed materials and compound feed in the listing of additives, if appropriate:
- Name of the additive,
- Amount of the hydroxy analogue of methionine added.
| 12 June 2023 |
3c308 | — | Calcium salt of hydroxy analogue of methionine | - Additive compositionHydroxy analogue of methionine: minimum 84 %Calcium: minimum 11,7 %Water: maximum 1 %
- Characterisation of the active substanceIUPAC name 2-hydroxy-4-(methylthio)butanoic acid, calcium saltCAS number 4857-44-7Chemical formula: (C5H9O3S)2Ca
- Analytical methodsFor the determination of hydroxy analogue of methionine in the additive:
- Titrimetry, potentiometric titration followed by oxidation reduction reaction.
For the determination of hydroxy analogue of methionine in premixtures, compound feed and feed materials:- High-Performance Liquid Chromatography and photometric detection (HPLC-UV).
| All animal species | — | — | — | - 1.For user safety: breathing protection, safety glasses and gloves should be worn during handling.
- 2.Declarations to be made on the labelling of the additive and premixtures:
- Hydroxy analogue of methionine content.
- 3.Declarations to be made on the labelling of feed materials and compound feed in the listing of additives, if appropriate:
- Name of the additive,
- Amount of the hydroxy analogue of methionine added.
| 12 June 2023 |
3c309 | — | Isopropyl ester of hydroxy analogue of methionine | - Additive compositionPreparation of isopropyl ester of hydroxy analogue of methionine: minimum 95 %Water: maximum 0,5 %
- Characterisation of the active substanceIUPAC name isopropyl ester of 2-hydroxy-4-(methylthio)butanoic acidCAS number 57296-04-5Chemical formula: C8H16O3S
- Analytical methodFor the determination of isopropyl ester of the hydroxy analogue of methionine in the feed:
- High-Performance Liquid Chromatography and photometric detection (HPLC-UV).
| Ruminants | — | — | — | - 1.Declarations to be made on the labelling of the additive and premixtures:
- Content of hydroxy analogue of methionine
- 2.Declarations to be made on the labelling of feed materials and compound feed in the listing of additives, if appropriate:
- Name of the additive,
- Amount of the hydroxy analogue of methionine added.
| 12 June 2023 |