Please contact us via the following methods:

● Visit the official website www.xtsentai.com to leave an online message or contact customer service.

● Sales Hotline: Manager Liu, 13017111041 / Manager Wang, 13925411105

● Foreign Trade Hotline: Manager Pan, 13638427897

● Company Phone: 0731-57788978

● Business email: cmc@xtsentai.com

● Company Address: No. 275, Yingchun Road, Yisuhé Town, Xiangtan County, Hunan Province

We will respond to your request within 24 hours and provide you with a professional product solution and quotation.

Hunan Sentai provides free samples (typically 100–300 g) to interested customers, with shipping costs borne by the customer or payable upon delivery. Minimum order quantities for bulk purchases vary by product model: industrial-grade products generally require a minimum order of 1 ton, while battery-grade specifications can be negotiated based on specific needs. OEM/ODM custom packaging is also available.

Hunan Sentai Biotechnology Co., Ltd. specializes in the research, development, and production of cellulose ethers and modified starches. Its quality assurance system includes:

● Strict raw material control, with carefully selected high-quality cotton linters, wood pulp, and starch.

● Advanced etherification production technology and an automated control system ensure excellent batch-to-batch consistency.

● A fully equipped quality‑control laboratory conducts rigorous testing on each batch prior to shipment, measuring key parameters such as viscosity, degree of substitution, purity, pH, and moisture content.

● ISO 9001, ISO 14001, ISO/TS 16949, and other certification certificates are available.

● Supports customized metric generation to meet customers’ specific formulation requirements;

● A team of technical experts provides end-to-end services, including pre-sales product selection, in-sales commissioning, and post-sales follow-up.

Selection should comprehensively consider the following factors:

1. Application Industries: Different industries have specialized grades (food-grade, pharmaceutical-grade, petroleum-grade, paper-making grade, construction-materials grade, daily‑chemical grade, ceramic grade, textile‑printing and dyeing grade, coating grade, etc.).

2. Viscosity requirements: Select a low-, medium-, high-, or ultra-high-viscosity grade based on the target viscosity of the formulation.

3. Degree of substitution requirement: For high-salinity, hard water, and applications requiring high transparency, select a product with a high degree of substitution.

4. Dissolution rate: Cold water is required for rapid dissolution; choose the instant‑dissolving type.

5. Acid resistance / Heat resistance requirements: For acidic formulations or high-temperature processes, select an acid‑resistant and heat‑stable grade of CMC.

6. Cost Budget: Under the condition of meeting performance requirements, CMS or medium-to-low substitution‑degree grades are more cost‑effective.

Hunan Sentai offers free samples and technical support, with professional engineers assisting customers in formulation optimization and model selection.

Hunan Sentai Biotechnology Co., Ltd. possesses full export qualifications and extensive experience in international trade services, supporting global exports:

Export Qualification:

● Possesses import and export business qualifications and may independently handle customs clearance for exports;

● We can provide ISO 9001 quality management system certification, ISO 14001 environmental management system certification, ISO/TS 16949 quality management system certification, and more.

● We can provide COA (Certificate of Analysis), MSDS (Material Safety Data Sheet), TDS (Technical Data Sheet), and certificates of origin (such as CO, Form A, Form E, etc.);

● Supports third-party inspections designated by the customer (e.g., SGS, BV, etc.).

Packaging method:

● Standard packaging: 25 kg per bag, with an inner liner of food-grade polyethylene film and an outer bag made of kraft paper composite or polypropylene woven fabric.

● Palletized packaging: 1 ton per pallet (40 bags × 25 kg); pallets may be solid wood or fumigation-free plywood (for export use), secured with stretch film.

● Customized packaging: Supports bulk packaging in 500 kg/bag and 1,000 kg/bag (ton bags), as well as branded labeling (OEM/ODM).

● Container capacity: A 20-foot container can typically carry 17–20 metric tons, while a 40-foot high-cube container can accommodate 25–28 metric tons (depending on packaging and palletizing methods).

Terms of Trade and Payment:

● Supports various trade terms, including FOB, CIF, CFR, EXW, and more;

● We accept payment methods such as T/T bank transfer, L/C letter of credit, and D/P. For new customers, a typical arrangement is 30% deposit upfront and the remaining 70% upon presentation of the bill of lading copy.

● Delivery Time: Standard models are in stock and can be shipped within 7–15 days; custom models require 20–30 days, depending on the production schedule.

Target market: Our products have been exported to numerous countries and regions, including Southeast Asia, the Middle East, South Asia, Africa, Europe, and South America. We are well-versed in the regulatory frameworks and customs clearance requirements of each market and can provide end-to-end professional international trade services.

Slight clumping (which crumbles when pinched by hand) is usually caused by moisture absorption and does not affect the active ingredients; the product can be used as usual after being crushed. However, if any of the following conditions occur, it is recommended to discontinue use:

● Hard clumps that cannot be crushed;

● The color has noticeably turned yellow or brown;

● Has an unusual odor or signs of mold;

After dissolution, the viscosity drops sharply or abnormal precipitates appear. These conditions may indicate that the product has degraded or become contaminated with microorganisms, and its performance can no longer be guaranteed.

Storage Conditions: Store in a cool, dry, well-ventilated warehouse at a temperature not exceeding 30°C and a relative humidity not exceeding 75%. Keep away from sources of ignition and heat, and avoid direct sunlight.

● Moisture‑proof requirements: The product is hygroscopic, so the packaging must be airtight. After opening, promptly reseal the inner bag or heat‑seal it to prevent moisture absorption, caking, and microbial contamination.

● Store separately: Avoid storing together with acids, bases, salts, and strong oxidizing agents.

● Shelf Life: Under the original packaging and specified storage conditions, the product has a shelf life of 24 months. Products past their expiration date may only be used after passing a re‑inspection.

Yes, and such combinations often yield synergistic effects:

● When compounded with xanthan gum: it significantly enhances viscosity and suspension stability, commonly used in food and personal care products.

● When compounded with guar gum: synergistic thickening and cost reduction; note the compatibility of cationic guar gum.

● Used in combination with starch or modified starch: enhances system stability and mouthfeel; commonly employed in food products.

● Blended with HPMC/HEC: Used in construction materials and coatings to modulate water retention and rheological properties.

● CMC and CMS in combination: Balances CMC’s stability with CMS’s cost-effectiveness, making it a common solution for industrial cost reduction. Prior to blending, a small-scale trial is recommended to verify compatibility and synergistic effects.

It has an impact. Calcium and magnesium ions in hard water can bind to the carboxyl groups of CMC/CMS, reducing solubility and viscosity; in severe cases, this may lead to precipitation. Recommendation:

● Prioritize using softened water or deionized water to prepare the solution;

● Select a salt-tolerant product with a high degree of substitution (DS ≥ 0.8);

● Under hard water conditions, appropriately increase the dosage to compensate for viscosity loss.

Flocculation and sedimentation are typically caused by the following factors:

● Acidic environment: When the pH falls below the acid precipitation point of CMC (typically pH < 4–5), CMC converts into an insoluble acidic form and precipitates. Adjust the system’s pH to neutral or slightly alkaline, or select an acid‑stable grade of CMC.

● High-valence metal ions: High-valence cations such as Al³⁺, Fe³⁺, and Cr³⁺ can form insoluble metal salt precipitates with CMC. Avoid direct mixing with substances containing these ions.

● Compatibility with cationic substances: CMC/CMS are anionic; when mixed with cationic surfactants or cationic polymers (such as cationic guar gum or polyquaterniums), charge neutralization may occur, leading to precipitation. If blending is required, a compatibility test should be conducted.

● Incomplete dissolution: Undissolved particles may appear as sediment; simply increase stirring and allow for further maturation.

Common causes and troubleshooting:

1. Inadequate dissolution: Undissolved “fish eyes” remain, leading to a reduced effective concentration. Extend the stirring or aging time (typically 10–60 minutes) until viscosity stabilizes.

2. Salt interference: CMC/CMS are anionic polymers; in formulations, high concentrations of cations such as Na⁺, Ca²⁺, and Mg²⁺ can shield the negative charges on the polymer chains, causing them to coil and reducing viscosity. This effect is particularly pronounced in cement-based systems and high-salinity formulations. It is recommended to select a salt‑tolerant grade with a higher degree of substitution, or to adjust the dosage accordingly.

3. pH Deviation: The viscosity of CMC/CMS solutions is most stable within the pH range of 6.5–8.5. A pH that is too low (<5) can cause acid-induced precipitation of CMC, while a pH that is too high can also adversely affect viscosity.

4. High-Temperature Shearing: Prolonged exposure to high temperatures or high-speed shearing can cause molecular chain degradation, leading to a reduction in viscosity. Avoid extended high-temperature steaming or cooking.

5. Microbial Degradation: Prolonged storage of the solution can lead to microbial growth, resulting in a decrease in viscosity. It is recommended to prepare and use the solution immediately, or to add a preservative.

6. Improper model selection: If the actual required viscosity exceeds that of the selected model, a higher-viscosity specification must be used.

“Fish‑eye” (a translucent, undissolved lump) is the most common issue during use. The root cause is that, upon contact with water, the powder’s surface rapidly forms a gelatinous film that encapsulates the dry powder inside, preventing further dissolution. The correct dissolving method is:

Method 1: Dry‑powder premixing (the most common and reliable approach): First, thoroughly blend CMC/CMS with the other dry ingredients in the formulation—such as sugar, salt, fillers, starch, and so on—according to the specified proportions. Then, gradually add this dry mixture to water while stirring. The dry particles are isolated by the other powders, preventing them from clumping together.

Method 2: The Powder-Adding‑While‑Stirring Method While stirring at medium speed to create a vortex, gradually and evenly sprinkle the powder into the water, allowing each particle to disperse individually and preventing a single, abrupt pour. Stir until no lumps remain, then continue stirring for 10–30 minutes until the viscosity stabilizes.

Method 3: Cold-Water Dispersion Combined with Hot-Water Acceleration. First, disperse the powder in cold water, then raise the temperature to 50–60°C to accelerate dissolution. Note that direct mixing with boiling water is prohibited, as high temperatures can cause the particle surfaces to rapidly gel and form a crust.

Method 4: Organic Solvent Pre-Wetting Method: Pre-wet and disperse the powder with a small amount of ethanol, glycerol, or isopropanol, then add it to water; this effectively prevents agglomeration.

In addition to the aforementioned mainstream fields, it is also widely used in:

● Water treatment: A flocculant for wastewater and sludge treatment, enhancing the solids content of the filter cake.

● Mineral processing: binders, flotation depressants, modifiers, and dispersants.

● Cigarettes: tobacco sheet binder, cigarette paper additive.

● Welding electrode: coating binder for the welding electrode.

● Agriculture: seed coatings, pesticide suspensions, and soil water‑retaining agents. As a clumping binder, it enables cat litter to quickly form compact clumps upon contact with urine, making scooping and cleanup easier while enhancing dust control and odor‑neutralizing performance.

● Feed: Acts as a binder and pelleting aid in pelletized feeds, enhancing pellet formation rate and hardness while reducing dusting during transportation and feeding. In aquaculture feeds, it also improves water stability.

● Charcoal / Briquettes: Used as a binding agent to consolidate charcoal powder, coal powder, or coke powder into molded charcoal, briquettes, or coal-water slurry, enhancing the strength and water resistance of the finished products while ensuring odorless combustion and low ash content.

● Negative electrode dispersant: CMC is an anionic polymer that adsorbs onto the surfaces of graphite and conductive carbon black via electrostatic interactions, inhibiting particle agglomeration and ensuring uniform, stable dispersion of the active materials in aqueous systems, thereby preventing slurry flocculation and uneven coating density.

● Slurry thickener: Soluble in water, it forms a three-dimensional network structure, increases slurry viscosity, prevents solid particle settling, and maintains slurry rheology and production continuity during coating.

● Interface binder: In synergy with SBR (styrene–butadiene rubber), it forms a two-component “CMC+SBR” bonding system. CMC anchors to the graphite surface via hydrogen bonds, while SBR provides flexible adhesion, enhancing both the bonding strength and flexibility of the electrode sheet and mitigating volume changes during charge–discharge cycling.

● Enhanced cycle life: CMC forms covalent bonds with surface hydroxyl groups on silicon‑based anodes, delivering adhesion far superior to that of PVDF and markedly improving the cycling stability of silicon‑carbon anodes. The typical addition level is 1%–2% relative to the anode active material, and battery‑grade products demand exceptionally high purity and stringent limits on metallic impurities.

● Thickening and rheology control: Increases the viscosity of coating systems, prevents pigment and filler settling during storage, and enhances pourability; imparts shear‑thinning behavior, reducing viscosity during application for improved leveling while restoring viscosity after brushing to prevent sagging.

● Water retention and film formation: slows the drying rate of coatings, extends the open time, prevents cracking and pinholing caused by excessively rapid surface drying, and enhances film continuity and smoothness.

● Dispersion and Stability: As a protective colloid, it helps ensure uniform dispersion of pigments and fillers, enhances the storage stability of coatings, and prevents water separation and re‑agglomeration.

Environmental advantages: Water-based, low in VOCs and odorless; suitable for interior wall latex paints, waterborne coatings, architectural paints, etc., with a typical addition level of 0.2%–0.8%.

Ceramic green body: Used as a binder for the green body, it enhances green‑body strength, reduces breakage, and improves forming performance.

● Glaze: Acts as a thickening and suspending agent in glazes, preventing sedimentation and enhancing the uniformity of glaze application.

● Slip casting: Adjusts the fluidity and stability of the slip, thereby increasing the yield of finished products.

Tablet disintegrants: CMS is a widely used superdisintegrant in the pharmaceutical field; upon contact with water, it swells rapidly, promoting rapid tablet disintegration and release, thereby enhancing dissolution.

● Tablet binder: CMC serves as a wet granulation binder, enhancing granule strength and tablet hardness.

● Suspensions / Liquid formulations: Used as thickeners and suspending agents to enhance the dispersion stability of the drug.

● Ointment/Gel Base: As a water-soluble ointment base, it exhibits excellent spreadability and drug release properties.

● Film-forming agents / Coating materials: Exhibits excellent film-forming properties and is used for pharmaceutical coating and the preparation of film dosage forms.

Toothpaste: Acts as a binder and thickener in the toothpaste formulation, ensuring a uniform, smooth texture, a glossy surface, and excellent shaping properties; used at levels of 0.5%–1.5%.

● Detergent / Laundry Powder: Acts as an anti‑soil‑re‑deposition agent, preventing soil from re‑attaching to fabrics, with particularly effective performance on hydrophobic synthetic fibers.

● Cosmetics: Used in facial creams, lotions, face masks, shampoos, and hand sanitizers as a thickener, emulsifier stabilizer, and suspending agent to enhance skin feel and system stability.

● Other daily consumer goods: mosquito coils, tobacco, air fresheners, pet food, etc.

Putty powder / Interior wall putty: high water-retention, extended open time, improved workability, and prevention of cracking and powdering; recommended addition rate: 0.3%–0.8%.

● Tile adhesive / bonding mortar: Enhances water retention and bond strength, and extends workability time.

● Cement mortar / plastering mortar: improves workability and water retention, and reduces hollowing and cracking.

● Latex paint / water-based coatings: Used as a thickener and leveling agent to enhance storage stability and application performance.

● Gypsum products: Adjust setting time, enhance strength, and improve water retention. High-viscosity grades are most widely used in the building materials sector, and CMS can significantly reduce formulation costs.

Warp sizing: As a sizing agent, it enhances yarn strength, abrasion resistance, and weaving efficiency, improves fabric hand and luster, and facilitates easy desizing.

● Printing paste: Serves as a thickener and protective colloid for printing color pastes, replacing sodium alginate to enhance color yield, prevent dye bleeding, improve pattern clarity and color fastness, while reducing costs.

● Stiffening finishing: Used in fabric finishing to impart a crisp, stiff hand feel; suitable for collar linings, ties, luggage fabrics, and more.

● Dyeing auxiliaries: help disperse and suspend dyes, slow down the dye uptake rate, enhance levelness, and reduce color mottling and blotching.