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How To Determine The Quality Of Sodium Carboxymethyl Cellulose CMC

Sodium Carboxymethyl Cellulose CMC referred to as CMC, CMC quality depends mainly on the purity and degree of substitution, the degree of substitution is not the same CMC of the indicators are different. If the solubility is enhanced, the degree of substitution is increased, so that the stability and transparency of the solution are better. It is understood that CMC transparency is the best, the degree of substitution between 0.7 to 1.2 PH in the six to nine,

The viscosity of the solution is maximum. Therefore, in order to maintain the quality, in addition to adding etherification agent, the need to consider the impact of purity and degree of substitution of some of the reasons. Such as etherification time, DH value, as well as the amount of alkali and etherification agent and other factors.

Sodium Carboxymethyl Cellulose CMC is the most widely used and widely used cellulose. Also known as carboxymethyl cellulose, Sodium Carboxymethyl Cellulose CMC. English abbreviation CMC. This product is recognized by the world as a safe food additive. In the last century, our country began to use. In the nineties of last century began to use.

(1) uranium nitrate method in the pH value of 3.5 -4 solution, uranium nitrate can make Sodium Carboxymethyl Cellulose CMC precipitation.

① Reagent. 4% uranyl nitrate solution.

② operation steps. The fabric sample was extracted with hot methanol and the extract was discarded. The fabric is then extracted with hot water. A few milliliters of 4% nitric acid uranium nitrate reagent was added to the partial extract, and if the yellow precipitate was coagulated, it indicated the presence of sodium acetate.

(2) Alkaline Dyeing Crine R Alkaline Dyeing Yellow Brown R is a quaternary dyestuff that can be used by all high molecular weight anionic substances such as sodium carboxymethylcellulose, alginate, fruit Acetic acid and anionic surfactants, and the like.

① Reagent. 0.1% Alkaline stained yellow brown R solution.

② operation steps. The fabric was extracted with hot methanol and the extract was discarded. The fabric is then extracted with hot water. Add I-2mL dye reagent to the extract in the tube and shake it. If there is the presence of methyl cellulose, it will form a red thread-like precipitate, which in the ultraviolet light can produce dazzling fluorescent red. While the reagent only emits yellow-green fluorescence under UV light.

If a sufficient amount of Sodium Carboxymethyl Cellulose CMC is present on the fabric after extraction by a narcissus, a small piece of dried square fabric can be directly immersed in the reagent and rinsed in water to be similar to that of UV The blank test was compared.

Sodium Carboxymethyl Cellulose CMC manufacturers of the product shape: the product is anionic cellulose ether, is a sodium salt, the state is milky white or white fiber powder. There is also granular. Basically there is a taste, with hygroscopicity, in the water will dissolve into a transparent liquid, but will not dissolve in ethanol and other organic solvents.

Product use: Sodium Carboxymethyl Cellulose CMC is mainly used in the pharmaceutical industry in the drug carrier, and in food for thickeners, used in printing and dyeing paste for the protection of paste and for sizing agent. Daily chemical is used as anti-re-coagulant, binder. Petrochemical is a part of the oil fracturing fluid.

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