DL-Alanine, identified by the CAS number 302 - 72 - 7, is a non - essential amino acid. It is a racemic mixture of D - alanine and L - alanine. The chemical formula of DL - Alanine is C₃H₇NO₂, and its molecular weight is approximately 89.09 g/mol. Physically, it appears as a white crystalline powder. DL - Alanine has a melting point around 297 - 300 °C (decomposed). It is soluble in water but insoluble in ethanol and ether. This compound is stable under normal storage conditions, and it should be stored in a cool, dry place away from direct sunlight and strong oxidizing agents.
1. **Food Industry**: DL - Alanine is widely used as a flavor enhancer in the food industry. It can improve the taste of food, especially in soups, sauces, and meat products. It has a slightly sweet taste and can enhance the umami flavor, making the food more palatable.
2. **Pharmaceutical Industry**: In the pharmaceutical field, it serves as an important raw material for the synthesis of various drugs. It can be used in the production of amino acid infusion solutions, which are used to supplement nutrients for patients with poor digestion or those in a state of malnutrition.
3. **Cosmetic Industry**: DL - Alanine can be added to cosmetics. It helps to maintain the moisture of the skin, improve skin texture, and has certain antioxidant properties, which can delay skin aging to some extent.
1. **In Food Applications**: When using DL - Alanine in food production, it should be added in accordance with relevant national food safety standards. Usually, it can be added during the cooking or processing stage. The appropriate dosage depends on the type of food and the desired taste. Generally, the dosage ranges from 0.1% to 1% of the total weight of the food.
2. **In Pharmaceutical Applications**: In the preparation of amino acid infusion solutions, strict aseptic operation is required. DL - Alanine should be accurately weighed according to the formula requirements and dissolved in a suitable solvent under appropriate conditions. The final product needs to meet the quality standards of pharmaceutical preparations.
3. **In Cosmetic Applications**: In cosmetics, DL - Alanine can be added to emulsions, creams, or lotions. It is usually added during the formulation process at a temperature below 60 °C to ensure its stability. The recommended dosage in cosmetics is between 0.5% and 2%.
1. **Food Case**: A soup production company added DL - Alanine to its chicken soup products. Before adding DL - Alanine, the soup had a relatively ordinary taste. After adding 0.5% DL - Alanine, the umami flavor of the soup was significantly enhanced. Consumer surveys showed that the acceptance rate of the new - formula soup increased by 20%, and sales also showed a significant upward trend.
2. **Pharmaceutical Case**: A hospital used an amino acid infusion solution containing DL - Alanine to treat patients with postoperative malnutrition. After a course of treatment, most patients showed improvement in their nutritional status. Blood tests indicated an increase in albumin levels and a faster recovery of physical strength.
3. **Cosmetic Case**: A cosmetic brand incorporated DL - Alanine into its moisturizing cream. After a three - month trial by consumers, feedback showed that 80% of users felt that their skin became more moisturized and smooth. The brand's sales of this cream increased by 15% compared to the previous period.
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