# The Feeding Stuffs (Amendment) Regulations 1991, Part III


“
4. Hydroxy-analogues of amino acids
4.1 Hydroxy-analogue of methionine and its salts
4.1.1. DL-2-hydroxy-4-methylmercapto-butyric acid
CH3-S-(CH2)2-CH(OH)-COOH
Total acids: minimum 85% Monomer acid: minimum 65%
All animal species except ruminants
Declaration to be made on the label or packaging of the product:
name (column 2)
monomer and total acids content in the case of 4.1.1, monomer content in the case of 4.1.2
moisture content
animal species or categories
4.1.2. Calcium salt of DL-2-hydroxy-4-methylmercapto-butyric acid
(CH3-S-(CH2)2-CH(OH)-COO)2Ca
Monomer acid: minimum 83% Calcium: minimum 12%
All animal species except ruminants
Declarations to be made on the label or packaging of compound feedingstuffs:
name (column 2)
monomer and total acids content in the case of 4.1.1, monomer content in the case of 4.1.2
the amount of the product contained in the feedingstuff
”

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Source: https://www.legislation.gov.uk/uksi/1991/1475/schedule/part/III (the official version)
Page: https://openlegislation.uk/feeding-stuffs-amendment-regulations-1991/schedule/part-III
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.