Questions buyers ask.

Yes. Sentai provides free samples of 100–300 g per grade with a certificate of analysis; the courier cost is paid by the buyer or sent freight-collect. Request samples from any product page or the contact form.

Industrial grades start at 1 tonne. Battery-grade MOQ is negotiable so that cell makers can qualify material at pilot scale.

Stock grades ship in 7–15 days after deposit; custom grades in 20–30 days. Peak-season lead times can extend to about one month.

Typically T/T with 30 % deposit and 70 % against copy of the bill of lading. L/C at sight and D/P are also accepted for established customers.

FOB, CFR, CIF and EXW. The usual port of loading is Guangzhou; other South China ports are available on request.

25 kg kraft-composite or PP woven bags with a food-grade PE liner; 500 kg and 1 t jumbo bags on request. 40 bags (1 t) per fumigation-free plywood pallet, stretch-wrapped. Custom labels and OEM packaging are available.

Approximately 17–20 t in a 20′ GP and 25–28 t in a 40′ HQ, depending on grade bulk density and whether pallets are used.

Commercial invoice, packing list, bill of lading, certificate of analysis per lot, SDS and TDS, plus certificate of origin (CO, Form A or Form E) as required.

Yes. Customer-appointed SGS, BV or other third-party inspection before loading is welcome.

Start from the application, then target viscosity at your use concentration, then degree of substitution (higher DS for salt, hard water, acid or clarity), purity requirements and dissolution speed (instant CMC for lump-free make-down). Our engineers recommend a grade and send samples.

High-viscosity grades are specified as a 1 % solution and low-viscosity grades as a 2 % solution, both at 25 °C with a Brookfield viscometer on a dry basis. Never compare values measured at different concentrations.

In the original sealed bags in a cool, dry, ventilated warehouse, off the floor and away from heat and moisture. CMC is hygroscopic: reseal opened bags and use them promptly.

Yes — viscosity window, DS, particle size, granulation and surface treatment can be tailored, and OEM packaging is available.

Residual sodium chloride from etherification can corrode the copper current collector and raise self-discharge. Sentai battery grades are alcohol-washed to ≤ 0.50 % chloride (as NaCl), and every batch is titrated before release.

Undissolved gels and fibres cause pinholes, streaks and filter blinding on the coater. Sentai counts gel particles per 4 cm² film and grades fibre and insolubles A/B; a 500 mL vacuum-filtration time is used as a quick check of slurry cleanliness.

Yes. Send the current material's TDS or a sample: our lab benchmarks viscosity, DS, chloride, gel count and filtration side by side and proposes the closest ST grade or a custom viscosity window.

Battery-grade MOQ is negotiable so that cell makers can qualify material at pilot scale. Free 100–300 g samples are available for lab evaluation.

The number reflects the degree of substitution. Type 6 (DS 0.75–0.90) is the economical thickener for neutral foods. Type 9 (DS ≥ 0.90) carries more carboxymethyl groups, so it stays soluble and protective at low pH — the requirement for acidified milk drinks.

GB 1886.232-2016, China's national food-safety standard for sodium carboxymethyl cellulose, including purity, sodium glycolate, heavy metals and microbiological limits. Contact us for the certificate of analysis and the regulatory documents your market requires.

Please tell us your destination market and certification requirement when you request a quotation; our export team will confirm the documentation available for the grade you select.

Regular CMC hydrates the moment it touches water, so the outside of a clump gels and seals dry powder inside ("fish-eyes"). Sentai's surface treatment delays hydration for a few seconds — long enough for each particle to disperse — so viscosity builds evenly and quickly with simple stirring.

No. Once dispersed, the treatment releases and the polymer develops the same viscosity profile as an untreated CMC of equal molecular weight. Final viscosity, clarity and stability are specified on the TDS.

PAC-LV controls filtrate loss with minimal viscosity increase — ideal for weighted muds where rheology is already high. PAC-HV adds viscosity and carrying capacity as well as fluid-loss control, typical for low-solids and polymer muds.

Both are carboxymethyl cellulose. PAC has a higher and more uniform degree of substitution (≥ 0.9), which gives it better salt and calcium tolerance; technical drilling CMC is the economical choice for fresh-water systems.

Sentai drilling grades are specified and tested against China's GB/T 5005 drilling-fluid materials standard (fresh water, 4 % brine and saturated brine). If your tender requires API 13A test data, request it with your enquiry and our lab will confirm.

Low-viscosity grades (roughly 7–50 mPa·s at 2 %) give water retention without excessive high-shear viscosity, which keeps blade coating runnable at high solids. Medium grades suit size-press and film-press applications. Send your formulation and our paper team will recommend a window.

Higher DS improves salt tolerance and solution clarity, which matters for glazes containing soluble salts and for printing glazes. Lower-DS, lower-purity grades are cost-effective body binders where those properties are less critical.

Choose a high-DS grade such as IH9 (DS ≥ 0.95) or IH10 (DS ≥ 1.0): more uniform substitution keeps the paste stable against electrolytes and plant extracts.

When cost per kilogram of thickening matters more than salt tolerance or clarity. CMS works well in paper surface sizing, drilling-mud fluid-loss control and textile sizing; CMC is preferred where high DS, high purity or long-term solution stability are required.