Methyl cellulose with the CAS number 9004 - 67 - 5 is a cellulose derivative in which some of the hydroxyl groups on the repeating glucose units of cellulose have been substituted with methoxy groups. It is a white to off - white fibrous or granular powder.
Some key physical and chemical parameters include:
Methyl cellulose has a wide range of applications across different industries:
In the food industry, it is used as a thickening agent, emulsifier, stabilizer, and film - former. For example, it can be added to salad dressings to improve texture and prevent oil separation. It also helps in improving the moisture retention of baked goods, thus extending their shelf life.
As a pharmaceutical excipient, methyl cellulose is used in tablet coatings to control the release of drugs. It can also be used as a suspending agent in oral suspensions, ensuring uniform distribution of the active ingredient.
In construction, it is added to cement - based mortars to improve workability, water retention, and adhesion. This helps in preventing the mortar from drying out too quickly, especially in hot and dry conditions.
When using methyl cellulose, the following steps are generally recommended:
A bakery was facing issues with the moisture loss and staling of its bread products. By adding methyl cellulose to the bread dough at a concentration of 0.5%, they noticed a significant improvement. The bread retained moisture for a longer time, and the texture remained softer. The shelf life of the bread increased from 2 days to 4 days, resulting in less product waste and higher customer satisfaction.
A pharmaceutical company was developing a new controlled - release tablet. They used methyl cellulose as a coating material. By carefully controlling the thickness and composition of the methyl cellulose coating, they were able to achieve the desired drug release profile. The tablets showed a slow and steady release of the active ingredient over a period of 12 hours, which was in line with the therapeutic requirements.
A construction project in a hot and dry region was experiencing problems with the rapid drying of cement - based mortars, which led to cracking and poor adhesion. By adding methyl cellulose to the mortar at a rate of 0.2%, the workability of the mortar improved significantly. The water retention of the mortar increased, and the problem of rapid drying was solved. This resulted in better - quality masonry work and reduced repair costs.
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Este é o William, Diretor Executivo da Zhishang Chemical Co., Ltd.
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