Carboxymethylcellulose sodium (CMC) is a chemical compound with the molecular formula C8H16NaO8, which is usually granular or fibrous. The main uses of Carboxymethylcellulose sodium are very common, for example as an emulsion breaker. It is also often used as an emulsifier, for example in many foods with this type of preservative. Is Carboxymethylcellulose sodium (CMC) harmful to health?
Damage of CMC:
CMC toxicity is very small, is relatively safe.
With reference to:
The FAO and WHO have approved the use of pure CMC in food products after rigorous molecular and toxicological studies and experiments. The national standard for safe intake (ADI) is 25mg/(kg•d), which is about 1.5 g/d per person. It has been reported that some people have taken up to 15kg in experiments without any adverse effects. CMC is not only an excellent thickener and emulsifier for emulsion in food application. And has excellent freezing cleaning, melting reliability, and can enhance the taste of goods, increase the storage time. Can be trusted.
CMC with strong alkali aqueous solution, soluble iron salt. And some other metal materials such as aluminum, mercury and zinc have contraindications, PH<2, and when mixed with 95% alcohol, will cause settling.
CMC and pectin and Arabic gum can produce common aggregates, but also can produce nitric oxide synthase with collagen, can settle some positively charged proteins.
The processing technology
CMC is generally a cationic polymer material compound prepared by the reaction of pure natural methyl cellulose with caustic soda and monochloro-glacial acetic acid, with a relative molecular weight of 6400(±1000). The key by-products are sodium oxide and sodium alcohol. CMC belongs to natural methyl cellulose modified material. The United Nations’ food and Agriculture Organization (FAO) and the World Health Organization (WHO) have declared it “modified material methylcellulose.”
The quality of
The key indexes to evaluate CMC quality are substitution degree (DS) and purity. Generally, the characteristics of CMC are different if DS is different; With the expansion of substitution degree, the solubility is improved, and the clarity and reliability of aqueous solution are better. It is reported that the CMC substitution degree is good at 0.7 ~ 1.2, and the solution viscosity is large at pH 6 ~ 9. In order to ensure its quality, in addition to the selection of etherifying agent, it is also necessary to consider some factors affecting the degree of substitution and purity, such as alkali and etherifying agent in the middle of the use of correlation, etherifying time, management system moisture content, temperature, pH value, material concentration and acid salt.
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