【CAS】63-68-3 Molecular formula:C5H11NO2S Relative molecular mass: 149.21
Fórmula estructural:
一．Propiedad del producto：
Melting point: 276 – 279℃ (deci)
Specific rotation: 23.25℃ (in 2.6N HCl solution)
Water solubility: Soluble
Solubility: Easily soluble in water. The solubility in water at 25℃ is 25g/100ml; at 50℃ it is 39.1g/100ml; at 75℃ it is 54.4g/100ml.
At 100℃, its concentration is 67.2g/100ml. It is insoluble in ethanol and can be dissolved approximately 0.06g in 100g of anhydrous ethanol. It is almost insoluble in acetone and ethanol.
二．Índice de calidad:
| Parámetro | Unidad | Especificación (grado alimentario) |
| Apariencia | - | White or light yellow crystalline powder |
| Assay (C₅H₁₁NO₂S) | % (p/p) | ≥ 98.5 |
| Pérdida por secado | % (p/p) | ≤ 0.5 |
| Residuos en el encendido | % (p/p) | ≤ 0.1 |
| Metales pesados (como Pb) | mg/kg | ≤ 10 |
| Arsénico (As) | mg/kg | ≤ 2 |
| Hierro (Fe) | mg/kg | ≤ 30 |
| Cloruro (Cl-) | % (p/p) | ≤ 0.2 |
| Sulfato (SO₄²-) | % (p/p) | ≤ 0.3 |
| Ammonium Salt (NH₄⁺) | % (p/p) | ≤ 0.05 |
| pH (solución 1%) | - | 5.0–7.0 |
| Límites microbiológicos | - | Recuento total en placa ≤ 1000 UFC/g; Sin patógenos. |
三．Ámbito de aplicación y uso：
DL-Methionine (Food-Grade) is a vital sulfur-containing amino acid primarily used as a nutritional supplement in food and animal feed to improve protein balance. In the food industry, it is added to cereals, dairy products, and health foods to enhance nutritional value, especially in vegetarian or low-protein diets. It also serves as a flavor enhancer in processed foods and seasonings due to its umami properties.
四．Embalaje y almacenamiento：
El envase de este producto es de 25 kilogramos por cubo.
For storage, keep methionine in a cool, dry, well-ventilated warehouse away from direct sunlight, high humidity, and strong oxidizers.
