Product Description
Introduction to Carboxymethyl Cellulose (CMC)
1. Definition
Carboxymethyl Cellulose (CMC) is a water - soluble anionic polysaccharide derived from cellulose, one of the most abundant natural polymers on Earth. Through a chemical modification process, hydroxyl groups (-OH) on the cellulose backbone are partially or fully replaced by carboxymethyl (-CH2COOH) groups. This modification endows CMC with unique properties, making it a versatile additive widely used in various industries. As a semi - synthetic polymer, CMC can be tailored in terms of molecular weight and degree of substitution to suit different application requirements.
2. Physical and Chemical Properties
- Physical Properties: CMC typically appears as a white to off - white powder. It has good water - solubility, forming clear and viscous solutions when dissolved in water. The viscosity of CMC solutions depends on factors such as concentration, molecular weight, and degree of substitution. Higher molecular weight CMC generally results in more viscous solutions. CMC also has excellent film - forming properties, which can form a thin, transparent, and flexible film upon evaporation of the solvent.
- Chemical Properties: CMC is stable under a wide range of pH conditions. In acidic solutions (pH > 2), CMC may start to precipitate due to the formation of insoluble carboxyl groups, but it remains stable in neutral and alkaline solutions. It shows good compatibility with many substances, including salts, proteins, and other polymers. CMC is resistant to microbial degradation to some extent, which helps maintain the stability of products containing it.
3. Production Methods
- Sodium-chloroacetate Method: This is the most common production method. First, cellulose is treated with NaOH to form alkali - cellulose. Then, Sodium-chloroacetate (ClCH2COONa) is added to the alkali - cellulose under controlled temperature and pressure conditions. The reaction between the hydroxyl groups of alkali - cellulose and Sodium-chloroacetate leads to the substitution of hydroxyl groups with carboxymethyl groups. After the reaction, the product is washed with water to remove impurities, and then dried to obtain CMC.
- Aqueous Phase Method: In this method, cellulose, NaOH, and Sodium-chloroacetate are all dissolved or dispersed in an aqueous medium. The reaction occurs directly in the water phase, which simplifies the process. However, precise control of reaction conditions is required to ensure uniform substitution and high - quality CMC production.
4. Storage Methods
- Environmental Conditions: CMC should be stored in a cool, dry place. The ideal storage temperature is between 5 - 30°C. High humidity can cause the CMC powder to absorb moisture, leading to caking and affecting its solubility and performance. Therefore, storage areas should be well - ventilated to prevent moisture accumulation.
- Sealing and Protection: CMC should be stored in tightly sealed containers to avoid contact with air and moisture. It should also be kept away from substances that may react with it, such as strong acids and oxidizing agents, to maintain its chemical stability during storage.
5. Market Information
- Global Production and Consumption: The global production and consumption of CMC have been growing steadily. Asia is the largest production and consumption region, mainly due to the rapid development of industries such as food, construction, and textiles in countries like China and India. The market is driven by the increasing demand for CMC in various applications, especially in the development of new and high - performance products.
- Market Trends: The CMC market is influenced by factors such as raw material prices (e.g., cellulose), technological advancements, and environmental regulations. As environmental awareness increases, the demand for CMC produced from sustainable and renewable cellulose sources is expected to rise.
6. Downstream Industry Chain
- Raw Material Suppliers: The main raw material for CMC production is cellulose, which can be sourced from wood pulp, cotton linter, and other plant - based materials. Suppliers of NaOH and sodium -chloroacetate also play important roles in the raw material supply chain.
- CMC Producers: These companies are responsible for converting raw materials into CMC through chemical reactions and purification processes. They focus on product quality control and innovation to meet the diverse needs of downstream industries.
- Processors and Fabricators: Industries such as food, construction, and textiles use CMC as an additive. Processors incorporate CMC into their products to improve properties like viscosity, stability, and texture.
- End - Users: End - users of CMC - containing products are widespread, including consumers of food products, construction projects, and textile manufacturers.
Detailed Photos
Product Parameters
| Item |
Specification |
Result |
| Appearance |
White or off-white powder |
Conforms |
| Purity (on dry basis) |
≥ 99.0% |
99.3% |
| Degree of Substitution (DS) |
0.6 - 0.95 |
0.78 |
| Viscosity (1% in water, 25°C) |
300 - 1200 mPa·s (as required) |
850 mPa·s |
| pH Value (1% solution) |
6.0 - 8.5 |
7.2 |
| Loss on Drying |
≤ 10.0% |
6.2% |
| Heavy Metals (Pb) |
≤ 10 ppm |
< 5 ppm |
| As |
≤ 3 ppm |
< 1 ppm |
| Water Insoluble |
≤ 2.0% |
0.8% |
| Sodium Glycolate |
≤ 0.5% |
0.2% |
| Residue on Ignition (Ash) |
≤ 20.0% |
15.7% |
| Particle Size (through 80 mesh) |
≥ 95% |
99.2% |
| Odor |
Odorless |
Conforms |
Application
Application Fields
- Food Industry: In the food industry, CMC is used as a thickener, stabilizer, and emulsifier. It can improve the texture of food products such as ice creams, jams, and salad dressings, preventing the separation of ingredients and enhancing product quality.
- Construction Industry: CMC is applied in construction materials like mortars, plasters, and paints. It can increase the workability of mortars, improve the adhesion of plasters, and enhance the stability and storage life of paints.
- Textile Industry: CMC is used as a sizing agent in the textile industry. It helps to improve the weaving efficiency by reducing the friction between yarns, and also provides better protection to the yarns during the weaving process.
Certifications
Product List
Company Profile
Shandong Jiuchong Chemical Company Limited was founded in 2016, which is located in Weifang City, Shandong Province, China. We have 228 square meters of office space. Now Jiuchong chemical is a large modern international chemical enterprise with more than 28 series. Since our establishment, the company has gradually established and improved a sound supply chain system, quality monitoring system and service system, ensuring products quality and service.
At the same time, relying on our own geographical location and resource advantages, our company is committed to the optimization of a variety of chemical supply chain, including magnesium chloride, sodium metabisulfite, sodium bicarbonate, calcium chloride, magnesium sulfate, polyaluminium chloride, aluminium sulfate, industrial salt, soda ash etc.
Our products are sold well in 288 domestic cities and more than 36 foreign countries. Now the company has won the praise and trust of domestic and foreign customers. Based on stable quality and output, good team service and staff efforts, we will continue to develop domestic and foreign markets.
Jiuchong chemical takes "integrity, innovation and development" as the concept, puts integrity in the priority position in serving customers, and guarantees high quality products and satisfactory cooperation for customers experience. Your satisfaction is our driving force. Quality is the soul of enterprise and that is what we have always done. In the future, Shandong Jiuchong Chemical Company Limited hopes to build a brilliant tomorrow with you!
FAQ
Q1: Is this product safe to handle?
A: Yes, it is generally considered safe and non-toxic under normal handling conditions. However, we recommend wearing gloves and a mask to avoid prolonged skin or inhalation exposure, especially in large-scale use.
Q2: What is the shelf life of this product?
A: The shelf life is 2 years when stored in a cool, dry, and well-ventilated area. It should be kept away from moisture to prevent caking or decomposition.
Q3: What packaging options are available?
A: Standard packaging includes 25kg or 50kg plastic woven bags with inner liners. We also offer jumbo bags and customized bag marks according to your requirements.
Q4: Can you provide documents such as COA, MSDS, or TDS?
A: Absolutely. We can provide Certificate of Analysis (COA), Material Safety Data Sheet (MSDS), Technical Data Sheet (TDS), and other documents as needed for customs or technical review.
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