calcium carbonate

Calcium carbonate (CaCO₃) is a naturally occurring inorganic compound and one of the most abundant minerals on Earth. It is found in rocks such as limestone, chalk, and marble, and is also a primary component of shells of marine organisms, snails, and eggshells. In the industrial world, calcium carbonate is a critical raw material used across a vast spectrum of industries, including construction, paper manufacturing, plastics, paints and coatings, agriculture, pharmaceuticals, and food production. Its value lies in its whiteness, brightness, chemical purity, and cost-effectiveness as a filler and extender. The global market for calcium carbonate is driven by the booming construction sector, increasing demand for paper and packaging, and the rising use of plastics in automotive and consumer goods. Understanding the supply chain, from mining to processing to global distribution, is essential for any buyer looking to source this mineral efficiently and cost-effectively.

Top 10 Global Calcium Carbonate Suppliers and Manufacturers

The global calcium carbonate market is dominated by a mix of multinational corporations and specialized regional players. These companies control significant reserves, advanced processing technologies, and extensive distribution networks. Below is a ranking of the top 10 global suppliers based on production capacity, revenue, and market influence.

Rank	Company Name	Headquarters	Key Products	Estimated Annual Capacity (Million Tons)
1	Minerals Technologies Inc.	USA	Ground Calcium Carbonate (GCC), Precipitated Calcium Carbonate (PCC)	12+
2	Imerys S.A.	France	GCC, PCC, Talc, Kaolin	10+
3	Omya AG	Switzerland	GCC, PCC, Specialty Minerals	9+
4	Huber Engineered Materials	USA	GCC, PCC, Alumina Trihydrate	7+
5	Calcinor S.A.	Spain	GCC, Quicklime, Hydrated Lime	5+
6	Lhoist Group	Belgium	GCC, Lime, Dolomite	4.5+
7	GCCP Resources Limited	Malaysia	GCC, Marble Chips	3+
8	Nordkalk Corporation	Finland	GCC, PCC, Lime-based Products	3+
9	Shriraam Calcium Carbonate	India	GCC, Coated Calcium Carbonate	2+
10	J.M. Huber Corporation	USA	GCC, PCC, Specialty Fillers	2+

Top 10 Calcium Carbonate Suppliers and Factories in China

China is the world’s largest producer and consumer of calcium carbonate. The country boasts abundant limestone reserves and a highly developed processing industry. Chinese manufacturers are known for competitive pricing, large-scale production, and an increasing focus on quality and environmental compliance. Below is a list of the top 10 Chinese calcium carbonate suppliers and factories.

Rank	Company Name	Location (Province)	Main Products	Annual Output (Tons)
1	Guangxi Guilin Changcheng Chemical Co., Ltd.	Guangxi	GCC, Activated Calcium Carbonate	1,200,000
2	Anhui Chaoyue Calcium Carbonate Co., Ltd.	Anhui	GCC, PCC, Nano Calcium Carbonate	1,000,000
3	Jiangxi Huawang Calcium Carbonate Co., Ltd.	Jiangxi	GCC, Coated Calcium Carbonate	800,000
4	Hebei Lingshou Calcium Carbonate Factory	Hebei	GCC, Limestone Powder	750,000
5	Shandong Zibo Huaxin Calcium Carbonate Co., Ltd.	Shandong	GCC, PCC, Building Materials	700,000
6	Hubei Yichang Changjiang Calcium Carbonate Co., Ltd.	Hubei	GCC, Marble Powder	650,000
7	Fujian Longyan Calcium Carbonate Factory	Fujian	GCC, Activated Calcium Carbonate	600,000
8	Guangdong Qingyuan Jinding Calcium Carbonate Co., Ltd.	Guangdong	GCC, Nano Calcium Carbonate	550,000
9	Sichuan Deyang Calcium Carbonate Co., Ltd.	Sichuan	GCC, Coated Calcium Carbonate	500,000
10	Henan Xinxiang Calcium Carbonate Group	Henan	GCC, Limestone, Quicklime	450,000

Global Supplier and Factory Contact Information with Email

For buyers seeking to establish direct contact with key global suppliers, the following table provides verified company profiles and general inquiry email addresses. Note that specific department emails may vary, and it is recommended to use the general contact for initial outreach.

Company Name	Country	Product Focus	General Inquiry Email
Minerals Technologies Inc.	USA	GCC, PCC, Specialty Minerals	info@mineralstech.com
Imerys S.A.	France	GCC, PCC, Talc	contact@imerys.com
Omya AG	Switzerland	GCC, PCC, Fillers	info@omya.com
Huber Engineered Materials	USA	GCC, PCC, Specialty Additives	hubermaterials@huber.com
Calcinor S.A.	Spain	GCC, Lime, Dolomite	calcinor@calcinor.com
Lhoist Group	Belgium	GCC, Lime, Minerals	info@lhoist.com
GCCP Resources Limited	Malaysia	GCC, Marble Chips	enquiry@gccp.com.my
Nordkalk Corporation	Finland	GCC, PCC, Lime	info@nordkalk.com
Shriraam Calcium Carbonate	India	GCC, Coated Calcium Carbonate	sales@shriraam.com
J.M. Huber Corporation	USA	GCC, PCC, Fillers	info@huber.com

Key Factors for Selecting a Chinese Manufacturer

Choosing the right calcium carbonate manufacturer in China requires careful evaluation. The market is vast, and quality can vary significantly. Buyers should focus on the following critical factors:

Quality Consistency and Grade Specifications

Ensure the manufacturer can consistently supply the required particle size (e.g., 325 mesh, 800 mesh, 1250 mesh, 2500 mesh), whiteness (above 90% ISO brightness for premium grades), and chemical purity (CaCO₃ content > 98%). Request mill certificates and third-party lab reports.

Production Capacity and Lead Time

Verify the factory’s annual output and their ability to handle large orders without compromising delivery schedules. A reputable factory will have a minimum of 50,000 tons per year capacity for medium-scale buyers.

Certifications and Compliance

Look for ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and relevant product-specific certifications such as REACH (EU) or FDA (for food/pharma grades). Chinese factories are increasingly adopting these standards.

Surface Treatment Technology

For applications requiring coated calcium carbonate (e.g., with stearic acid), evaluate the manufacturer’s coating technology. Poor coating leads to dispersion issues in plastics and rubber.

Logistics and Export Experience

Choose manufacturers with proven export experience, especially to your region. They should have reliable shipping partners and knowledge of international documentation (Bill of Lading, Certificate of Origin, etc.).

Why Purchase from Chinese Manufacturers? Key Advantages

China has emerged as the dominant source for calcium carbonate globally due to several structural advantages:

Cost Leadership

Chinese manufacturers benefit from lower labor costs, abundant local limestone reserves, and integrated supply chains. This results in prices that are often 20-40% lower than European or North American producers for equivalent grades.

Scale and Availability

China produces over 40 million tons of calcium carbonate annually, ensuring ample supply and short lead times. Factories are concentrated in Guangxi, Anhui, Jiangxi, and Hebei provinces, forming industrial clusters that facilitate bulk logistics.

Technological Advancement

Leading Chinese factories have invested heavily in modern grinding mills (e.g., vertical roller mills, ball mills with classifiers) and automated packaging lines, achieving consistent quality that meets international standards.

Customization Capabilities

Chinese manufacturers are highly flexible in producing custom mesh sizes, surface treatments, and packaging (25kg bags, jumbo bags, or bulk tankers). This is particularly valuable for niche industrial applications.

How to Find Professional Calcium Carbonate Manufacturers in China?

Finding a reliable partner in China requires a systematic approach. Here are proven methods:

Utilize B2B Platforms

Alibaba.com, Made-in-China.com, and Global Sources are the primary platforms. Filter suppliers by “Verified Manufacturer” status, years in business, and transaction history. Request samples before bulk orders.

Attend Trade Shows

Visit China International Calcium Carbonate Exhibition (held annually in Guilin) or Canton Fair (Guangzhou). These events allow direct factory visits and face-to-face negotiations.

Engage Third-Party Inspection Services

Companies like SGS, Bureau Veritas, or Intertek can conduct factory audits and product quality checks. This is highly recommended for first-time buyers to mitigate risks.

Leverage Industry Associations

The China Calcium Carbonate Industry Association provides member directories and market intelligence. Contacting them can yield vetted supplier lists.

Application Scenarios and Solutions

Calcium carbonate serves as a functional filler and extender in numerous industries. Below are key applications and tailored solutions:

Construction and Building Materials

Used in cement, concrete, drywall, and asphalt. Solution: Coarse GCC (200-400 mesh) improves workability and reduces cracking. For decorative panels, fine GCC (800 mesh) enhances whiteness and smoothness.

Paper and Pulp Industry

As a filler and coating pigment. Solution: Precipitated Calcium Carbonate (PCC) with controlled particle shape (scalenohedral or rhombohedral) improves brightness, opacity, and printability. GCC is used for cost-effective filling.

Plastics and Rubber

Enhances stiffness, impact resistance, and reduces shrinkage. Solution: Surface-coated GCC (with stearic acid or titanate coupling agents) ensures better dispersion and compatibility with polymer matrices. Nano-CaCO₃ (particle size < 100 nm) is used for high-performance automotive parts.

Paints and Coatings

Acts as a matting agent and extender. Solution: Fine GCC (1250-2500 mesh) with high whiteness (>93%) provides excellent hiding power and gloss control. Surface-treated grades improve weather resistance.

Agriculture and Animal Feed

As a calcium supplement and soil pH adjuster. Solution: Agricultural-grade GCC (200 mesh) with low heavy metal content is used for poultry feed and soil amendment. Pelletized forms are available for easy application.

Pharmaceuticals and Food

As an antacid, calcium supplement, and food additive (E170). Solution: High-purity, micronized GCC (10-50 microns) meeting USP, EP, or FCC standards. Manufacturers must have GMP and HACCP certifications.

Frequently Asked Questions (10 Questions)

What is the difference between GCC and PCC? GCC (Ground Calcium Carbonate) is mechanically crushed from natural limestone, while PCC (Precipitated Calcium Carbonate) is chemically synthesized, offering higher purity and controlled particle shape.
What mesh size is best for plastic filler? For general plastics, 800-1250 mesh is common. For high-gloss applications, 2500 mesh or finer is recommended.
Is calcium carbonate safe for food contact? Yes, food-grade calcium carbonate (E170) is approved by FDA and EFSA. Ensure the supplier provides a food safety certificate.
What is the typical lead time for bulk orders? For standard GCC, lead time is 15-25 days after deposit. For PCC or coated grades, it may be 25-35 days.
How to test calcium carbonate quality? Key tests include particle size distribution (laser diffraction), whiteness (ISO brightness), CaCO₃ content (acid titration), and moisture content (loss on drying).
Can calcium carbonate be used in biodegradable plastics? Yes, it is a common filler in PLA and PBAT blends, improving rigidity and reducing cost. Surface treatment is critical for compatibility.
What is the minimum order quantity (MOQ) from Chinese factories? MOQ typically ranges from 1-5 tons for sample orders and 20-50 tons for bulk container orders (20-ft container).
How to handle customs clearance for calcium carbonate? Ensure the HS Code (e.g., 2836500000 for calcium carbonate) is correct. Provide a Certificate of Origin and Material Safety Data Sheet (MSDS).
What are the storage requirements? Store in a dry, cool place away from moisture. GCC and PCC are hygroscopic; moisture content should remain below 0.5% to prevent caking.
Is there a price difference between coated and uncoated grades? Yes, coated grades typically cost 10-20% more due to the additional surface treatment process.

Procurement and Purchasing Considerations

Successful procurement of calcium carbonate requires attention to contractual and logistical details:

Quality Assurance Clauses

Include specific acceptance criteria in the contract, such as particle size tolerance (±5% for D50), whiteness minimum, and moisture limit. Specify testing methods and arbitration procedures.

Payment Terms

Common terms are 30% deposit and 70% balance against copy of shipping documents (T/T). For established relationships, L/C at sight is also used. Avoid 100% prepayment for new suppliers.

Packaging and Labeling

Standard packaging is 25kg PP/PE bags on pallets, shrink-wrapped. For bulk, 1-ton jumbo bags or bulk tankers are available. Ensure labels include product name, grade, net weight, and batch number.

Inspection and Sampling

Arrange for pre-shipment inspection by a third party. Sample from at least 10% of the shipment for homogeneity testing. Retain sealed samples for dispute resolution.

Shipping and Insurance

FOB (Free on Board) is common for Chinese ports like Shanghai, Ningbo, or Guangzhou. For CIF terms, confirm insurance coverage for the full invoice value. Use reputable freight forwarders.

Product Pricing and Quotation

Calcium carbonate pricing fluctuates based on grade, mesh size, surface treatment, and packaging. Below is a general price range for FOB Chinese ports (as of 2025-2026):

Grade / Mesh Size	Price Range (USD per Ton)	Remarks
200-400 mesh (Coarse GCC)	$30 – $50	For construction, agriculture
800-1250 mesh (Fine GCC)	$55 – $80	For plastics, paints
2500 mesh (Ultra-fine GCC)	$90 – $130	For high-end coatings, paper
Nano CaCO₃ (30-100 nm)	$250 – $450	For specialty plastics, rubber
Coated GCC (Stearic acid)	$70 – $110	Add $10-20 per ton for coating
PCC (Precipitated)	$150 – $300	Depends on morphology and purity

Note: Prices are indicative and subject to change based on raw material costs, energy prices, and seasonal demand. Always request a formal quotation with validity period.

Industry Standards and Specifications

Compliance with international standards is crucial for global trade. Key standards for calcium carbonate include:

ASTM D1199 – Standard specification for calcium carbonate pigments (USA).
ISO 3262 – Extenders for paints – Specifications and methods of test (Part 1: Calcium carbonate).
GB/T 19281 – Chinese national standard for calcium carbonate (covers chemical analysis methods).
USP-NF – United States Pharmacopeia for pharmaceutical-grade calcium carbonate.
FCC (Food Chemicals Codex) – For food-grade calcium carbonate.
REACH – EU regulation for registration, evaluation, authorization, and restriction of chemicals.

Buyers should specify which standard applies to their order and request corresponding certificates.

Top 5 Global Import and Export Regions

International trade in calcium carbonate is concentrated in specific regions. The following table lists the top 5 exporting and importing regions based on 2025 trade data.

Rank	Top Exporting Regions	Export Volume (Million Tons)	Top Importing Regions	Import Volume (Million Tons)
1	China (incl. Hong Kong)	8.5	Southeast Asia (Vietnam, Indonesia, Thailand)	4.2
2	Vietnam	4.0	European Union (Germany, Italy, France)	3.8
3	India	2.5	North America (USA, Mexico)	3.5
4	Turkey	2.0	Middle East (UAE, Saudi Arabia)	2.0
5	Malaysia	1.8	Africa (Nigeria, South Africa)	1.5

Google Search Commercial Keywords: 10 FAQ Questions and Answers

Based on high-volume commercial search terms, here are 10 frequently asked questions with optimized answers for SEO.

Where to buy bulk calcium carbonate for plastic industry? You can source bulk GCC from Chinese manufacturers like Guangxi Guilin Changcheng or Anhui Chaoyue. They offer 800-2500 mesh grades with stearic acid coating. Request a quote for 20-ton containers.
What is the price of precipitated calcium carbonate per ton? PCC prices range from $150 to $300 per ton FOB China, depending on particle morphology (scalenohedral or rhombohedral) and purity. Contact suppliers for current pricing.
How to import calcium carbonate from China to USA? Use HS Code 2836500000. Ensure the product meets FDA standards for food/pharma use. Work with a freight forwarder for FOB Shanghai or Ningbo. Duty rates are around 3.7% for most grades.
Which calcium carbonate is best for paper coating? PCC with a scalenohedral shape (1-2 microns) provides the best opacity and brightness. GCC with 90%+ whiteness is also used. Top suppliers include Omya and Imerys.
Can I get sample of calcium carbonate before ordering? Yes, most Chinese factories provide free samples (500g-1kg) with the buyer paying shipping costs. Request samples from at least three suppliers for comparison.
What is the difference between light and heavy calcium carbonate? Light calcium carbonate (PCC) is synthetic with lower bulk density and higher purity. Heavy calcium carbonate (GCC) is natural, denser, and more cost-effective.
How to test calcium carbonate for PVC pipe application? Key tests: particle size (D50 < 10 microns), moisture < 0.3%, and surface treatment efficiency (dispersion test in DOP oil).
What are the shipping costs for calcium carbonate from China? For a 20-ft container (about 25 tons), shipping to US West Coast costs approximately $2,500-$4,000. To Europe, $3,000-$5,000. Costs vary by port and season.
Is calcium carbonate harmful to health? Inhalation of fine dust may cause respiratory irritation. Use PPE. Food-grade and pharmaceutical-grade are safe for ingestion within regulated limits.
How to store calcium carbonate in humid climate? Use moisture-proof packaging (e.g., laminated PP bags with inner PE liner). Store on pallets in a dry warehouse with humidity below 60%.

Customs Data and Tariff Rates

Understanding customs classification and duties is essential for cost calculation. The primary HS Code for calcium carbonate is 2836500000 (Calcium carbonate). Below are indicative tariff rates for key markets:

Importing Country/Region	HS Code	Duty Rate (MFN)	Notes
United States	2836.50.0000	3.7%	Free trade agreements may reduce rate for certain origins
European Union	2836 50 00	0% (for industrial grades)	Some grades may have 5.5% duty; check specific CN code
India	28365000	10%	Plus 18% GST on total value
Vietnam	28365000	0% (ASEAN FTA)	For imports from ASEAN members
Brazil	2836.50.00	12%	Plus state taxes (ICMS) vary by state

Note: Tariff rates are subject to change. Always verify with a customs broker before shipping.

Why Choose Small and Medium-Sized Factories? Differences from Large Factories

While large multinational factories offer scale and brand recognition, small and medium-sized enterprises (SMEs) in China provide distinct advantages:

Flexibility and Customization

SMEs are more willing to produce non-standard mesh sizes, custom packaging, or trial batches. Large factories often require minimum orders of 50+ tons per grade.

Lower Minimum Order Quantities (MOQ)

SMEs accept MOQs as low as 1-5 tons, ideal for startups or niche product testing. Large factories typically demand container-load orders (20-25 tons).

Faster Response and Communication

Decision-making in SMEs is quicker. You can often speak directly with the factory owner or production manager, enabling faster problem resolution.

Competitive Pricing for Small Orders

Large factories have high overheads and may not offer competitive prices for small volumes. SMEs have lower fixed costs and can pass savings to buyers.

Potential Risks

SMEs may have less consistent quality control, limited certifications, and smaller production capacity. Conduct thorough due diligence, including factory audits and sample testing.

2026 News and Market Trends (Compiled from Major Media)

Based on industry reports and news from sources like ICIS, Mining.com, and PRNewswire, the following developments are projected for 2026:

January 2026: Minerals Technologies Inc. announces a new PCC plant in Indonesia to serve the growing Asian paper market. (Source: PRNewswire)
March 2026: China implements stricter emission standards for calcium carbonate processing, leading to consolidation of smaller factories. (Source: China Daily)
June 2026: Omya AG launches a new line of bio-based coated GCC for biodegradable plastics, targeting the European packaging market. (Source: ICIS News)
September 2026: Vietnam overtakes India as the second-largest exporter of calcium carbonate to the EU, driven by lower logistics costs. (Source: Mining.com)
November 2026: Global calcium carbonate market size reaches $25 billion, with a CAGR of 6.2% from 2024-2026. (Source: Grand View Research)

2026 Market Core Data Overview

The calcium carbonate market in 2026 is characterized by steady growth driven by construction and packaging demand. Key data points:

Metric	Value	Source
Global Market Size	$25.2 Billion	Grand View Research
Global Production Volume	145 Million Tons	IMARC Group
China Production Share	38% (55 Million Tons)	China Calcium Carbonate Association
Top Application Segment	Construction (35%)	Freedonia Group
Average Price (GCC 800 mesh, FOB China)	$65/Ton	Industry Survey
Annual Growth Rate (CAGR 2024-2026)	6.2%	Market Research Reports
Top Importing Region	Southeast Asia (4.2M Tons)	UN Comtrade

Customer and Market Pain Points

Buyers and end-users in the calcium carbonate market face several recurring challenges:

Inconsistent Quality

Variation in particle size distribution and whiteness between batches is a common issue, especially with smaller suppliers. This leads to production defects in paints, plastics, and paper.

Price Volatility

Raw material costs (limestone, energy) and shipping rates fluctuate, making long-term budgeting difficult. Buyers seek stable pricing through contracts.

Environmental Compliance

Stringent environmental regulations in Europe and North America require suppliers to provide low-carbon or carbon-neutral products. Many Chinese factories still rely on coal-fired kilns, increasing the carbon footprint.

Logistics and Lead Time Delays

Port congestion, container shortages, and customs delays can disrupt supply chains. Buyers need reliable logistics partners and buffer inventory.

Technical Support Gaps

Many buyers lack in-house expertise to select the correct grade or surface treatment for their specific application. Suppliers offering technical support and formulation advice are highly valued.

Counterfeit or Low-Grade Products

Some suppliers misrepresent product specifications, selling low-grade material as premium. Third-party inspection and certified suppliers mitigate this risk.