DL-Cysteine hydrochloride (CAS 10318-18-0) is a high - quality chemical compound available at a low price. It is a white crystalline powder with good solubility in water. The molecular formula of DL - Cysteine hydrochloride is C₃H₇NO₂S·HCl. The molecular weight is approximately 157.62 g/mol. It has a melting point in the range of about 175 - 178 °C. This product is known for its high purity, which can meet the strict requirements of various industries.
1. **Food Industry**: DL - Cysteine hydrochloride is used as a food additive. It can act as a dough conditioner in bread - making. By reducing the disulfide bonds in gluten, it helps to improve the extensibility and elasticity of the dough, resulting in a better - textured bread with a larger volume. It can also be used as an antioxidant in some processed foods to prevent the oxidation of fats and oils, thus extending the shelf - life of products.
2. **Pharmaceutical Industry**: In pharmaceuticals, it is used as a raw material for the synthesis of various drugs. It can participate in the synthesis of some amino - acid - based drugs. Additionally, it has certain antioxidant and detoxification functions, which can be used in the treatment of some oxidative - stress - related diseases.
3. **Cosmetics Industry**: Due to its antioxidant properties, DL - Cysteine hydrochloride is added to some cosmetics. It can help to protect the skin from free - radical damage, reduce the appearance of wrinkles, and keep the skin youthful and healthy. It can also be used in hair care products to improve the strength and elasticity of hair.
1. **In Food**: When used as a dough conditioner, the recommended dosage is usually 0.01% - 0.03% of the flour weight. First, dissolve the DL - Cysteine hydrochloride in a small amount of water, and then add the solution to the dough during the mixing process. Make sure it is evenly distributed in the dough.
2. **In Pharmaceuticals**: The usage in pharmaceuticals should follow strict medical and chemical synthesis procedures. It is usually involved in chemical reactions under specific temperature, pressure, and pH conditions. Professional chemists or pharmaceutical researchers should operate according to the established synthesis protocols.
3. **In Cosmetics**: In cosmetics, it can be added during the formulation process. The dosage depends on the specific product type. For skin - care products, the recommended concentration is around 0.1% - 1%. It should be added to the formula after proper dilution to ensure uniform dispersion.
1. **Bread - making Case**: A local bakery started using DL - Cysteine hydrochloride as a dough conditioner. Before using it, their bread had a relatively small volume and a dense texture. After adding DL - Cysteine hydrochloride at a dosage of 0.02% of the flour weight, the bread volume increased by about 20%. The texture became softer and more elastic, which led to an increase in customer satisfaction and a 15% increase in sales within a month.
2. **Pharmaceutical Research Case**: A research team was working on developing a new antioxidant drug. They used DL - Cysteine hydrochloride as a key raw material in the synthesis process. After a series of experiments and optimizations, they successfully synthesized a new compound with strong antioxidant activity. In vitro cell experiments showed that this new compound could effectively reduce the production of reactive oxygen species in cells, indicating its potential in treating oxidative - stress - related diseases.
3. **Cosmetic Product Case**: A cosmetic company launched a new anti - aging skin - care cream containing 0.5% DL - Cysteine hydrochloride. After a three - month user trial, 80% of the participants reported a visible reduction in the appearance of fine lines and wrinkles. The skin also became more hydrated and supple, which led to positive feedback from consumers and an increase in the product's market share.
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