dl-methionine feed grade Properties White flake crystal or crystalline powder. Has a special smell. Slightly sweet. Melting point 281 degrees (decomposition). PH value of 10% aqueous solution is 5.6-6.1. No optical activity. Stable to heat and air. Instable to strong acid, can lead to demethylation. Soluble in water (3.3g/100ml, 25 degrees), dilute acid and dilute solution. Extremely insoluble in ethanol, almost insoluble in ether.
dl-methionine feed grade Uses Nutritional supplements. It has the same physiological effect as L-type methionine, but it is lower (L-type is obtained from DL-type), so DL-methionine is generally used. In plant foods such as oats, rye, rice, corn, wheat, peanut flour, soybeans, potatoes, spinach to improve amino acid balance. Requirements vary with cystine intake. Adult men need 1.1g/d. The taste of sea urchin is related to methionine, the sweet taste of sea urchin is related to glycine and alanine, the bitter taste is related to valine, and the umami taste is related to glutamic acid. Therefore, these amino acids can be formulated into flavoring agents. It is still used for amino acid infusion and comprehensive amino acid preparation.