CMS, also known as Carboxymethyl starch sodium, the chemical formula is[C10H19O8Na]n. It is a white or yellow powder with no odor or taste, non-toxic and resistant to mold, and dissolves in cold water at room temperature to form an electrolyte colloid solution.
Sodium carboxymethyl starch has functions such as thickening, suspending, emulsifying and stabilizing. It is used as a disintegrant for tablets and a raw material for capsules in the pharmaceutical field, and is applied to the thickening and stabilization of products like ice cream and jam in the food industry, and as a coating enhancer and surface sizing agent in the paper industry. Its improved product replaces corn starch with potato starch and enhances performance through process optimization, which is applied in the production of pharmaceutical disintegrants. This substance is biodegradable and is widely used in industries such as petroleum, textiles, and cosmetics.
Item | CMS-1 | CMS-2 | CMS-3 |
appearance | white or light yellow powder | white or light yellow powder | white or light yellow powder |
moisture | 12%max | 12%max | 12%max |
pH | 8.0-12.0min | 8.0-12.0min | 8.0-12.0min |
D.S. | 0.25min | 0.35min | 0.30min |
purity | 85% | 80% | 80%min |
Sieve | 95%min | 95%min | 95%min 250μm (60mesh) |
viscosity | 500-1000 | 50-200 | 200-500 |
Packed in 25kg (55.1lbs) net multiply paper bags or valve paper bags.
Stored in a cool, dry place, temperature < 40°C, relative humidity < 75%, CMS shelf life is 24 months.
Sodium carboxymethyl starch (CMS) is a modified starch that has been etherified with carboxymethyl groups. It is flavorless, non-toxic, resistant to mold, and soluble in water. It exhibits various functions such as thickening, suspending, emulsifying, stabilizing, shaping, film-forming, expanding, preserving, acid resistance and health promotion when used in different foods. Food-grade sodium carboxymethyl starch is widely used in products such as milk, beverages, frozen foods, fast food, pastries, syrups, etc. Moreover, CMS is physiologically inert and has no calorific value, so it can achieve ideal results when used to manufacture low-calorie foods.
Carboxymethyl starch sodium (CMS) has extensive applications in the field of medicine. In terms of pharmaceutical preparations, CMS can replace gelatin and be used as raw materials for making capsules, tablets, and sugar coatings. It has strong water absorption and expansion properties. It can quickly swell in cold water, and after absorbing water, the particles expand without dissolving. It does not form a colloid solution and does not hinder the further disintegration of the tablets due to the lack of a gel structure, thus it can be used as an efficient disintegrant and excipient for insoluble and soluble drug tablets.
CMS has extensive applications in papermaking. When added as a stabilizer in fillers, it plays a role in thickening and bonding, making the paper have bright luster, improving the printing performance of the paper, enhancing the toughness and wear resistance of the paper. When used as a pulp additive, it improves the retention and filtration effects. It is also used for surface sizing of paper, which can significantly improve the dry strength, wet strength, oil resistance, ink absorption and water resistance of the paper. Its use in coating adhesion can enhance the production and usage performance of the paper.
Its solution has excellent effects such as thickening, stability, water retention, film formation, and suspension. It is easy to use, safe and environmentally friendly. It has been widely applied in the building materials industry. It is used as a thickening and water-retaining agent in putty powder and latex paint; as a suspension agent, stabilizer, and film-forming agent in coatings, with functions such as emulsification, thickening, and anti-deposition. It is made into cement powder and applied in cement plastering mortar, cement insulation and crack-resistant mortar, tile adhesive, exterior wall waterproof putty, and other products related to cement.
CMS is used in the ceramic industry as a shaping agent, plasticizer, and reinforcing agent for the raw materials. It can increase the bonding force of the raw materials, making the body easier to shape, and the flexural strength is increased by several times, effectively reducing the breakage rate of the body; it can also allow the moisture in the raw materials to evaporate evenly, preventing cracking during drying. When added to the glaze slurry as a stabilizer and binder, it can enhance the bonding between the body and the glaze, making the glaze in a dispersed state, increasing the surface tension of the glaze, improving the smoothness of the glaze surface, and reducing the pinhole phenomenon after firing.
CMS possesses functions such as chelation, ion exchange, and polymeric cation flocculation, and can be used as a stabilizer, fiber finishing agent, and dirt-removing agent in laundry product formulations. Its scale-removal effect is significantly superior to CMC, and its dirt diffusion capability is excellent, especially for hydrophobic synthetic fiber fabrics, with an outstanding anti-dirt re-precipitation effect. In the cosmetics industry, CMS is used as a solid or water-absorbing binder in cosmetic products, such as anti-acne drug preparations and skin cleansers. In toothpaste, CMS can form a three-dimensional polymer network structure, ensuring the storage stability of the paste in the tube, extending the shelf life; improving the uniformity and surface smoothness of the paste; and reducing the transportation power of the paste. CMS is easily biodegradable and safe and environmentally friendly.
The aqueous solution of CMS is stable and has excellent performance. It possesses functions such as adhesion, thickening, water retention, emulsification, suspension, and dispersion. During oil well operations, CMS serves as a mud stabilizer and water retention agent, playing a role in reducing water loss and enhancing the coagulation stability of clay particles in the drilling fluid. The plastic viscosity of the mud is minimally affected by CMS, but its impact on power and shear force is significant, which is beneficial for carrying drill cuttings. Especially when drilling salt layers, it can stabilize the drilling fluid, reduce the loss volume, and prevent well wall collapse. It is particularly suitable for use in saline and alkaline wells with high salinity and high pH values.
The aqueous solution of CMS is stable and has excellent properties. It possesses functions such as adhesion, thickening, water retention, emulsification, suspension, and dispersion. The raw material of CMS is starch, which is widely available and has a low price. For the printing industry, CMS is used as a carrier paste for dyes and printing auxiliaries, and it has the advantages of good compatibility and stability. The dyeing paste prepared with CMS also has excellent permeability, especially for fabric embossing that requires deep and transparent effects. It can quickly print patterns according to the mold shape and significantly enhance the vividness of the printing. Moreover, CMS can dissolve in cold water, making it convenient to use.
CMS meet API-13A and GB/T 5005-2010
standard | viscometer dial reading at 600r/min | filtrate volume(ml) |
in 40 g/l salt water | ≤18 | ≤10 |
in saturated salt water | ≤20 | ≤10 |
