Sodium carboxymethylcellulose water solubility

Sodium carboxymethylcellulose is soluble in water at all temperatures. Because of the... 

Sodium carboxymethylcellulose (NaCMC) Soluble in water and polar solvents. 

Sodium carboxymethylcellulose (commonly known as CMC) was introduced in 1945 by Josephson and Dahle 10) for use in ice cream. It is cold water-soluble, will not react with acid, and has excellent water-binding properties. When properly processed, it is easily dispersible and quickly soluble in the mix. These properties make it well suited for high temperature-short time (HTST) mix. When used alone, it has a tendency to cause separation or wheying off in the mix. Irish moss extract is used with CMC to eliminate this condition. From 0.15 to 0.25% CMC is most often used in ice cream mix. 

Early soil-release agents, applied particularly to resin-finished cellulosic goods, were water-soluble polymers, many being related to thickeners (section 10.8) such as starch, hydroxypropyl starch, sodium carboxymethylcellulose, methylcellulose, hydroxyethyl-cellulose, alginates, poly(vinyl alcohol) and poly(vinylpyrrolidone). These functioned essentially as temporary barriers and preferential reservoirs for soil, which was thus easily removed along with the finish in subsequent washing, when they then helped to minimise... 

Sodium carboxymethylcellulose is formed by the reaction of sodium chloroacetate with basic cellulose solutions. The sodium form of carboxymethylcellulose is known as CMC or as a food grade product as cellulose gum. It is soluble in both hot and cold water. 

Within this group, the linear polymers have been most intensively studied and researched. The main area of interest lies in water-soluble polymers. However, there have also been many studies into organic solutions, although there exist problems with odor and toxicity in the case of analytical studies. Among the water-soluble additives, tests were made especially on polyethyleneoxide (PEO), polyacrylamide and the coacrylates (PAAm, PAAm/AAcNa), polyacrylic add (PAA), guar gum (GG), carboxymethylcellulose (CMC) and sodium salts, as well as hydroxyethylcellulose (HEC). From these tests, PEO proved to be the most effective flow improver, followed closely by PAAm, which is somewhat more stable than PEO in turbulent flow. 

Various salts other than the sodium salt have also received attention in this field. For example, lacquer films are prepared by the co-precipita-tion of a resin acid with aluminum carboxymethylcellulose,84 and the barium salt86 is said to possess thixotropic properties useful in paints. One unusual application involves the preparation of the water-soluble ferrous salt86 of carboxymethylcellulose which, when applied (for example to wall-... 

Sodium carboxymethylcellulose (CMC) is the most widely used water-soluble derivative of cellulose. It is prepared from alkali cellulose with sodium chloroacetate as reagent ... 

This ester-type anesthetic is poorly absorbed. Because it contains benzocaine, which has a low water solubility, it is prepared in a base containing petrolatum and sodium carboxymethylcellulose. Eugenol is included for its antiseptic and anodyne properties. Hydroxy-quinoline sulfate is a preservative. This ointment can be directly applied to abraded or ulcerated lesions with minimal systemic effects. It is sometimes used to temporarily relieve denture sores and painful lesions. 

CAS 9004-32-4. TM for anionic water-soluble sodium carboxymethylcellulose polymer. 

Whatever the type of soil removed, once this soil is detached from the substrate, barriers must be set up to inhibit reattachment or redeposition. The chemicals used to achieve this are known as antiredeposition agents. Surfactants can achieve this by adsorbing onto the detached soil and setting up electrostatic and steric barriers to redeposition. For example, anionic surfactant can adsorb onto a particle to induce a negative charge, and the resultant repulsion of these particles from negatively charged cotton. Nonionic surfactants can adsorb onto the surface of oily soil droplets, form a macroemulsion, and set up steric barriers to redeposition. In practice, water-soluble polymers (e.g., sodium carboxymethylcellulose) are used for antiredeposition, but the mechanisms are electrostatic and steric stabilization. 

Starch derivatives Water-soluble cellulose derivatives Carboxymethylcellulose, sodium salt Hydioxyethylcellulose Hydroxypropylcellulose Hydroxypropylmethylcellulose Methylcellulose... 

Properties. Sodium carboxymethylcellulose [9004-32-4] (CMC), also known as cellulose gum, is an anionic, water-soluble cellulose ether available in a wide range of substitution. The most widely used types are in the 0.7-1.2 DS range. Water solubility is achieved as the DS approaches 0.6 as the DS increases, solubility increases. The rate at which CMC dissolves depends primarily on its particle size. Finely ground material dissolves faster than coarser grades. The coarse material. 

Economic Aspects. Sodium carboxymethylcellulose remains the most important of the water-soluble compositions worldwide consumption for 200 is estimated at 179,0001 (Table 2). The projected annual growth rate from 2000 to 2005 is nominal at 1.6% globally. A declining growth rate of 3% is expected in Japan over this period, but this rate is coimteracted by a projected 3% growth rate expected in the rest of the world over this same time period, excluding the United States and Western Europe. 

Sodium carboxymethylcellulose is readily soluble in water and is insoluble in organic solvents. The material is used as a soil-suspending agent in detergents, suspending agent in latex paints and as an adhesive it is also used as a stabiUzer in food products such as ice cream. 

Ocular systems (Figure 7.5b) with application in the lower ophthalmic conjunctival sac for the controlled release of ciprofloxacin (pre- or post-operative treatment of topical infections, as well as conjimctivitis) were obtained from polyvinyl alcohol and sodium carboxymethylcellulose linking the two polymers by an esterification reaction between the hydroxyl groups of the polyvinyl alcohol and carboxyl groups of carboxy-methyl cellulose [47]. Membranes were obtained by the incorporation of the antibiotic into the polymer solution with the addition of glycerol as a plasticizer (in order to ensure the flexibility of the membrane). The advantage of using these polymers comes from their biocompatibility and from the fact that they are water soluble as the controlled release occms, the membrane is dissolved by the tear bed at 35"C temperature. 

General methods for cross-linking of biopolymers such as hydroxyethylcellulose (HEC), carboxymethylcellulose sodium salt (CMC Na) and hyalnronic acid (HA) using water soluble carbodiamide are summarized in a review published in 2005 [24]. The interesting invention described the synthesis of water-insoluble derivative of hyaluronic acid cross-linked with biscarbodiimide [25]. 

Carboxymethylcellulose Sodium. Carboxymethyl ether of cellulose sodium salt (Citmcel) (8) is a white granular substance soluble in water depending on the degree of substitution. It is equally soluble in cold and hot water and may be prepared by treating alkaU cellulose with sodium chloroacetate. 

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