India's Anti-Dumping Duty on Vietnamese Filler Masterbatch: Why Importers Are Switching to Raw GCC Powder (2026)

In short: In December 2025 India imposed an anti-dumping duty on Vietnamese calcium-carbonate filler masterbatch (HS 3824.99, US$ Nil–75/MT) — and has since opened a countervailing-duty investigation on the same product. Neither touches raw GCC powder (HS 2836.50), which enters at 0% under the ASEAN-India FTA (AIFTA) with a Form AI certificate. India is already the world's largest buyer of Vietnamese calcium carbonate, so the practical response for compounders is to import the raw powder and blend masterbatch domestically. This guide explains the duty position, the powder route, and how to choose a grade — whiteness, mesh, coated vs uncoated — for sacks, film, and pipe.

India's Directorate General of Trade Remedies (DGTR) and the CBIC moved against Vietnamese filler masterbatch in two steps:

• Anti-dumping duty — in force. Notification 37/2025-Customs (ADD), dated 24 December 2025, imposes a definitive anti-dumping duty on calcium-carbonate filler masterbatch originating in or exported from Vietnam, classified under HS 3824.99, at US$ Nil–75/MT depending on the producer (most producers face the top US$75/MT; a few cooperating exporters are lower). It runs for five years.
• Countervailing-duty investigation — pending. India has separately initiated a countervailing-duty (CVD) probe on the same Vietnamese masterbatch. No CVD has been imposed yet, but the direction of travel is clear: the finished-masterbatch route from Vietnam is being squeezed from two sides.

The product that is NOT covered: raw GCC powder. Both measures target the compounded masterbatch — calcium carbonate already blended into a plastic carrier — under HS 3824.99. Raw ground calcium carbonate powder sits under HS 2836.50, a different product in a different tariff chapter (Chapter 28, inorganic chemicals, vs Chapter 38, chemical preparations). DGTR's own product definition confines the duty to the masterbatch form. Raw powder is outside scope.

The duty changed the math. A converter buying finished Vietnamese masterbatch now pays up to US$75/MT of anti-dumping duty on top of the landed cost. A masterbatch maker who imports the raw powder and compounds it domestically pays no such duty — and India has no shortage of PP/PE compounding capacity to do that blending.

So the logical response is a shift up the value chain: import the raw powder (HS 2836.50), compound the masterbatch in India, and keep the duty off the bill. The economics favour it, and India already imports more Vietnamese calcium carbonate than any other country. (One honest caveat: this is the rational response to the duty, and early signs point to it, but the full scale of the shift is still building — treat it as the direction, not a settled statistic.)

Raw calcium carbonate powder (HS 2836.50) is on India's Normal Track under the ASEAN-India FTA (AIFTA) — it is part of India's concession schedule, not on the exclusion list. India's Normal-Track tariff lines have been reduced to 0%, so Vietnam-origin raw GCC powder qualifies for a 0% preferential import duty with a Form AI certificate of origin (Form AI is the AIFTA certificate; do not confuse it with Form E, which is for China-origin goods under ACFTA — relevant if you also import resin from China). Without Form AI, the MFN basic customs duty of around 7.5% applies.

A few practical points:

• Confirm the current line. Tariff lines and rules of origin are periodically revised. Verify the live AIFTA rate for your exact HS subheading on ICEGATE or with your customs broker before contracting.
• EPR. India now requires importers of plastic raw material (resin or pellets) to register on the CPCB Centralized EPR Portal before customs clearance (CBIC Instruction 21/2025-Customs). That obligation attaches to plastics — your China-origin resin, and a plastic-carrier masterbatch — not to the mineral powder under Chapter 28. Plan EPR registration for the resin side of the basket.
• HS classification matters. Keep raw powder under 2836.50 and masterbatch under 3824.99; a misclassification can attract a duty the correct product does not carry.

Three terms that are often confused:

Bottom line: filler masterbatch for plastics uses GCC — bulk cost-filling is its job. PCC is not "better"; it is for a different purpose. For an Indian converter lowering cost on sacks, film, or pipe, the path is GCC — as raw powder (if you compound in-house) or as masterbatch (if you don't). With the masterbatch now dutied from Vietnam, the raw-powder route is the one that has changed in your favour.

For white or light products — white packaging film, sheet, household goods — the whiteness of the CaCO₃ determines the final appearance and how much expensive white pigment you can save.

1. Whiteness is not the same as brightness. Brightness (ISO 2470) measures reflectance at a single wavelength near 457 nm; whiteness measures reflectance across the full visible spectrum — closer to what the eye judges. A good spec sheet lists both as separate figures, so compare grades on the same basis.
2. Practical tiers: ≥90% is the quality floor; ≥95% whiteness is common for masterbatch grade; high-quality natural GCC from select deposits reaches 97–99%.

Vietnam vs India's domestic GCC — the honest picture. India is not short of calcium carbonate: it has a substantial domestic industry across Rajasthan, Gujarat and Andhra Pradesh, and for many grades domestic powder is the right, lower-freight choice. The wedge for imported Vietnamese grade is specific, not general: India's largest domestic producers cap around 93% ISO brightness and do not target food/pharma, whereas the premium Vietnamese tier — very fine (around 1250 mesh), high-whiteness (approaching 98%), stearic-coated — serves white film, food/pharma fillers, and premium masterbatch. The case for importing is that top spec plus the AIFTA-0% powder route and a single counterparty for resin and filler — not a claim that one origin's quarry is categorically superior.

Titanium dioxide (TiO₂) substitution: TiO₂ is far more expensive than CaCO₃. High-whiteness CaCO₃ does not replace TiO₂ entirely (TiO₂ gives an opacity CaCO₃ does not), but it lets you cut part of the TiO₂ in many white applications — a real saving.

Fineness is best read as D50 (microns) — the median particle size. "Mesh" (800, 1250, 2000) is a marketing label; below ~400 mesh physical sieving no longer applies, so treat mesh as an indication, not an exact size.

India's woven-sack and FIBC (jumbo-bag) sector is the world's largest exporter, and it is one of the heaviest users of calcium-carbonate filler — so sack and FIBC grades (≈800–1000 mesh, coated) are the highest-volume India demand. Finer particles give a smoother surface and thinner-gauge capability but cost more and need more coating; coarse particles or grit cause film tears and screen blockage.

Coated = the CaCO₃ surface is treated with stearic acid (around 1% for fine GCC, rising to 2–3% for ultrafine) so it becomes organophilic — better dispersion in PP/PE, lower moisture pickup, less agglomeration. Uncoated is cheaper and adequate for low loadings or non-critical applications. For thin film, high loadings, or products needing a smooth surface, coated is generally worth the cost. Fineness and coating are two separate levers — choose both to suit the application, not "as fine as possible."

Distinguish two figures that are commonly conflated:

• CaCO₃ content inside the masterbatch: ~70–85%.
• Loading of masterbatch (or powder) into resin at your machine:

Cost logic (illustrative): if filler costs about half the price of virgin resin per kilogram, a 25% loading cuts raw-material cost by roughly 12% (0.25 × 50%). But the real saving is smaller than "25% replaced" — part of any masterbatch load is carrier resin, and the saving depends on the price spread between filler and resin — and it only materialises if tensile strength, dispersion, and surface quality stay acceptable. Loading too much to save money raises costs through rejects.

Not simply "yes." CaCO₃ raises stiffness and lowers cost; whether the product turns brittle or stays tough depends on loading, fineness, dispersion, and coating. Excessive loading, poor dispersion, or particles that are too coarse create stress-concentration points and lower impact strength. A fine, well-coated grade at the right loading maintains impact toughness within acceptable limits. "Filler makes plastic brittle" is true only when the grade or loading is wrong.

The parameters that determine fit: CaCO₃ purity (%), whiteness (%) (consistent measurement basis), particle size (D50, µm), coating and stearic-acid level, oil absorption, and top cut / largest particle (the main cause of film tears). Compare the lot's certificate of analysis against the grade's technical data sheet before the container ships.

Beyond price, the considerations are lot-to-lot consistency (stable whiteness, D50, purity), carrier/resin compatibility, technical support to match grade to application, and documentation (per-lot CoA, Form AI for Vietnam origin, EPR registration on the resin side).

One more — supplier consolidation. A converter importing resin from China (Form E) and filler from Vietnam (Form AI) is running two certificate-of-origin regimes and two FX exposures. One partner handling both removes a point of customs error and simplifies the paperwork. Kantor Materials supplies both — China-origin resin and the premium GCC/filler we source directly from Vietnam — handling sourcing, quality, and documentation as one relationship.

Does India's anti-dumping duty on Vietnamese calcium carbonate cover raw GCC powder?

No. The December 2025 anti-dumping duty (Notification 37/2025-Customs (ADD), 24 Dec 2025) applies to calcium-carbonate filler masterbatch from Vietnam under HS 3824.99, at US$ Nil–75/MT depending on the producer. Raw ground calcium carbonate powder under HS 2836.50 is a different product in a different tariff chapter and is outside the scope of that duty. India has also initiated a countervailing-duty investigation on the same Vietnamese masterbatch — again, on the masterbatch, not the raw powder.

Why are Indian compounders importing raw GCC powder instead of finished masterbatch?

Because the duty fell on the finished masterbatch (HS 3824.99) and not the raw powder (HS 2836.50). A masterbatch maker who already has PP/PE compounding capacity can import the raw powder, blend the masterbatch in-house, and avoid the up-to-US$75/MT duty on the finished import. India has ample domestic compounding capacity, so the logic is sound — though the scale of the shift is still building, not yet fully documented.

What is the import duty on raw calcium carbonate powder from Vietnam into India?

Calcium carbonate (HS 2836.50) is on India's Normal Track under the ASEAN-India FTA (AIFTA), so Vietnam-origin raw powder qualifies for a 0% preferential duty with a Form AI certificate of origin (the MFN basic customs duty is around 7.5% without it). Confirm the current line on ICEGATE or with your customs broker before contracting. EPR/CPCB obligations attach to plastic raw materials and packaging, not to the mineral powder itself.

Is Vietnamese GCC better than Indian domestic calcium carbonate?

Not categorically. India has a substantial domestic GCC industry, and for many applications domestic powder is the right choice. The wedge for imported Vietnamese grade is specific: very fine (around 1250 mesh), high-whiteness (approaching 98%), stearic-coated powder for white film, food/pharma, and premium masterbatch — a tier India's largest domestic producers (capping around 93% ISO brightness, excluding food/pharma) do not consistently serve.

How much CaCO₃ is inside filler masterbatch, and how much do you load into resin?

Filler masterbatch is typically 70–85% CaCO₃ by weight (the rest is carrier resin plus 2–3% wax/stearic-acid additives). Loading into resin depends on the application: PP woven sacks 5–30% (around 15% or less for fine denier; up to ~40% for coarse tape), PE blown film 5–20%, injection 10–30%. Because the masterbatch is ~80% CaCO₃, a 25% load is only ~20% actual CaCO₃ in the finished product.

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Have a specific filler or resin requirement? Tell us — product type, application, the whiteness/mesh you need, destination port, and volume — and our team will respond with a matching grade (including high-whiteness coated powder), an indicative CFR price to Mumbai/Mundra/Chennai, and the documentation.

See also: India Market Hub · India Polymer Market 2026: Duty, Anti-Dumping, and EPR · India Polymer Import Documentation: HS Codes, CoO, CoA.