The appearance of sodium metabisulfite is white or light yellow crystalline powder, small crystals, sodium metabisulfite can be distinguished into food grade sodium metabisulfite and industrial grade sodium metabisulfite.
We have a certain understanding of food grade sodium metabisulfite, it can be used for anti-corrosion application, color lock application, anti-browning application and other applications;It can be used in the manufacture of pastry, steamed bread and other food flour as bleach to bleach it; It can be used in the production of bread and biscuits and other food to make it soft, taste better; It can be added to juice, preserves, cans to extend its shelf life, It also has a bactericidal effect, and has a good antioxidant and fresh-keeping effect on seafood and fruits and vegetables.
And industrial grade sodium metabisulfite also has a very large application in the industrial field at this stage, such as its early strong function in concrete, but its addition amount can not be higher than 0.1%-0.3%, if added too much, the later strength of concrete may be negatively affected, fat water reducer is a type of high water reduction, high enhancement of water reducer category, It has the advantages of simple production process, short processing cycle time, and no three wastes discharge during processing and operation. Industrial grade sodium metabisulfite can also be used for leather processing in the leather industry to make the leather soft, tough and waterproof, anti-bending, wear-resisting. In the printing and dyeing industry it can be used as the deoxidizer and cotton cooking additives after cotton bleaching. It can also be used in the photographic industry for fixing agent ingredients, oilfield wastewater treatment, chromatographic analysis reagents and mine beneficiation agents.
So what is the difference between food grade sodium metabisulfite and industrial grade sodium metabisulfite? Toption will explain the following aspects of the gap between food grade and industrial grade sodium metabisulfite: According to the national standard:
1. There is no requirement for clarification degree and lead content proportion for industrial grade, but there are requirements for food grade.
2. The specified Fe content of food grade is below 30PPM and industrial grade is below 50PPM.
3. The main content of food grade and industrial grade excellent products is the same, which is higher than 96.5%.
That is, the difference is: iron content of industrial grade is 50PPM, food grade is 30PPM, for common enterprises’s products the iron content is 20ppm; Lead content provisions of food grade is below 5PPM, there are no regulations for industrial grade; It has clarification degree regulation for food grade , for industrial grade there is no regulation.
In addition, in the actual enterprise processing, the main content is generally above 97%, but for the processing of food grade the enterprise must get the food production license. If you want to get this certificate,it requires the cleanliness of the factory workshop, such as wall tiles, stainless steel production lines and so on. A lot of industrial grade products manufacturer don’t have this certificate.
Weifang Toption Chemical Industry Co., Ltd. is a professinal manufacturer and supplier of sodium metabisulfite. If you have need or if you are interested in our company, please don’t hesitate to contact us.
Post time: Jul-26-2023