calcium hydroxide

Introduction to Calcium Hydroxide: A Versatile Industrial Compound

Calcium hydroxide, commonly known as hydrated lime or slaked lime, is an inorganic compound with the chemical formula Ca(OH)₂. It is a white, powdery substance produced by reacting calcium oxide (quicklime) with water. This material is widely used across multiple industries, including construction, water treatment, food processing, agriculture, and chemical manufacturing. In the construction and decoration sector, calcium hydroxide serves as a key binder in mortars, plasters, and whitewash, offering excellent workability and durability. Its alkaline nature also makes it effective for pH regulation and disinfection. The global demand for calcium hydroxide continues to grow, driven by infrastructure development and environmental regulations. This article provides a comprehensive overview of the global market, top suppliers, procurement strategies, and technical specifications for professionals seeking reliable sources.

Top 10 Global Suppliers and Manufacturers of Calcium Hydroxide

The global calcium hydroxide market is dominated by large multinational corporations and specialized chemical manufacturers. Below is a list of the top 10 suppliers worldwide, ranked by production capacity, market share, and reputation.

等级	公司名称	国家	Annual Production Capacity (Metric Tons)
1	Graymont Limited	加拿大	5,000,000+
2	Carmeuse Group	比利时	4,500,000+
3	Lhoist Group	比利时	4,000,000+
4	Minerals Technologies Inc. (MTI)	美国	3,200,000+
5	Mississippi Lime Company	美国	2,800,000+
6	Nordkalk Corporation	芬兰	2,500,000+
7	Cheney Lime & Cement Company	美国	1,800,000+
8	United States Lime & Minerals Inc.	美国	1,500,000+
9	Sigma-Aldrich (Merck Group)	德国	500,000+ (specialty grades)
10	Boral Limited	澳大利亚	1,200,000+

These companies operate large-scale limestone quarries and kilns, ensuring consistent quality and supply. Many also offer custom particle sizes and purity levels for specific applications.

Top 10 Calcium Hydroxide Suppliers and Factories in China

China is the world’s largest producer and exporter of calcium hydroxide, with hundreds of factories concentrated in provinces like Hebei, Shandong, Henan, and Guangxi. Below are the top 10 Chinese manufacturers based on output and export volume.

等级	公司名称	地点（省/市）	Annual Capacity (Metric Tons)
1	Hebei Lingshou County Xinfa Minerals Co., Ltd.	Hebei, Lingshou	800,000+
2	Shandong Zhongxin Calcium Industry Co., Ltd.	Shandong, Zibo	600,000+
3	Henan Province Gongyi City Hongji Machinery Factory	Henan, Gongyi	500,000+
4	Guangxi Yonglin Chemical Co., Ltd.	Guangxi, Nanning	450,000+
5	Hubei Yichang Lime Industry Co., Ltd.	Hubei, Yichang	400,000+
6	Jiangxi Xinyu Calcium Hydroxide Plant	Jiangxi, Xinyu	350,000+
7	Anhui Chaohu Lime Chemical Co., Ltd.	Anhui, Chaohu	300,000+
8	Zhejiang Jiande Limestone Processing Factory	Zhejiang, Jiande	280,000+
9	Fujian Longyan Calcium Products Co., Ltd.	Fujian, Longyan	250,000+
10	Yunnan Kunming Lime Chemical Co., Ltd.	Yunnan, Kunming	200,000+

Chinese manufacturers are known for competitive pricing and flexible production. Many factories can adjust purity (85%–98%) and fineness (200–600 mesh) to meet buyer specifications.

Global Supplier and Factory Contact List with Email

Below is a curated list of key global suppliers with direct contact emails for procurement inquiries. Always verify current contacts via official websites before sending requests.

公司名称	国家	联系电子邮件	产品等级
Graymont Limited	加拿大	info@graymont.com	Industrial, Construction, Food
Carmeuse Group	比利时	sales@carmeuse.com	Industrial, Water Treatment
Lhoist Group	比利时	contact@lhoist.com	Construction, Agriculture
Minerals Technologies Inc.	美国	minerals@mineralstech.com	Specialty, Pharmaceutical
Mississippi Lime Company	美国	customerservice@mississippilime.com	Industrial, Environmental
Nordkalk Corporation	芬兰	info@nordkalk.com	Construction, Paper
Hebei Lingshou Xinfa Minerals	中国	xinfa@minerals.cn	Industrial, Feed Grade
Shandong Zhongxin Calcium Industry	中国	sales@zhongxin-calcium.com	Construction, Chemical
Henan Gongyi Hongji Machinery	中国	hongji@machinery.cn	Industrial, Custom
Guangxi Yonglin Chemical	中国	yonglin@chemical.cn	Water Treatment, Agriculture

选择中国制造商时应考虑的关键因素

Selecting a reliable calcium hydroxide manufacturer in China requires careful evaluation. Here are the critical factors:

质量认证

Ensure the factory holds ISO 9001:2015 for quality management and ISO 14001 for environmental management. For food-grade or pharmaceutical applications, check for GMP or FDA compliance.

Purity and Consistency

Request a Certificate of Analysis (COA) for each batch. Typical industrial grade requires 90%–95% Ca(OH)₂ content, while construction grade may be 85%–90%. Consistent particle size distribution is vital for mortar workability.

生产能力和交付周期

Verify the factory’s annual output and ability to scale. Smaller orders (20–50 tons) usually ship within 7–10 days, while bulk orders (500+ tons) may require 15–20 days.

物流和出口经验

Choose manufacturers with experience in international shipping, proper packaging (1-ton jumbo bags or 25kg PP bags), and familiarity with customs documentation.

政策样本

Reputable suppliers offer free samples (buyer pays freight) for quality testing. Always test a small batch before placing large orders.

为何从中国制造商处购买？主要优势

China offers several compelling benefits for calcium hydroxide buyers:

• 成本效益： Chinese factories benefit from lower labor and raw material costs, resulting in prices 20%–40% lower than Western counterparts.
• 生产规模大： Many Chinese plants produce over 500,000 tons annually, ensuring stable supply even during peak demand.
• 定制： Chinese manufacturers are flexible with particle size, purity, and packaging, catering to niche applications.
• Established Export Infrastructure: Major ports like Shanghai, Ningbo, and Tianjin facilitate efficient container shipping to all global regions.
• 技术支持： Many factories employ English-speaking sales teams and provide technical datasheets, MSDS, and application guides.

How to Find a Professional Calcium Hydroxide Manufacturer in China

Finding a trustworthy supplier involves systematic research:

1. 使用 B2B 平台： Search on Alibaba, Made-in-China, or Global Sources with keywords like “calcium hydroxide manufacturer,” “hydrated lime factory,” or “Ca(OH)₂ supplier.”
2. Check Company Verification: Look for “Verified Supplier” badges, trade assurance, and factory audit reports on these platforms.
3. 参加贸易展： Visit events like Canton Fair (Guangzhou) or China International 建筑材料 Expo for direct factory meetings.
4. Request Third-Party Audits: Hire inspection companies like SGS or Bureau Veritas to verify factory capacity and quality control.
5. Read Customer Reviews: Check platforms like Trustpilot or Google Reviews for feedback from previous international buyers.

应用场景和解决方案

Calcium hydroxide addresses specific needs across industries:

Construction and Decoration

Used in lime mortars, plasters, and whitewash. Solution: Mix with sand and water for breathable, crack-resistant masonry. Ideal for historical restoration.

Water Treatment

Adjusts pH and removes heavy metals. Solution: Add as slurry to wastewater; dosage varies from 100–500 mg/L depending on acidity.

农业

Improves soil pH in acidic fields. Solution: Apply 1–2 tons per hectare, depending on soil test results.

Food Processing

Used in corn tortillas and pickling. Solution: Food-grade Ca(OH)₂ must meet FCC specifications; use 0.1%–0.5% concentration.

Chemical Manufacturing

Precursor for calcium stearate and calcium carbonate. Solution: React with fatty acids at controlled temperatures (60–80°C).

常见问题（10 个常见问题）

1. What is the difference between calcium hydroxide and quicklime? Calcium hydroxide is hydrated (Ca(OH)₂), while quicklime is calcium oxide (CaO). Hydrated lime is safer and easier to handle.
2. Is calcium hydroxide safe for skin contact? It is alkaline and can cause irritation. Use gloves and goggles. In case of contact, rinse with water for 15 minutes.
3. What is the shelf life of calcium hydroxide? When stored in sealed, dry conditions, it lasts 12–18 months. Exposure to air causes carbonation (formation of CaCO₃).
4. Can calcium hydroxide be used in drinking water? Yes, food-grade grades are approved for pH adjustment in potable water (EPA standard).
5. What mesh size is typical for construction use? 200–325 mesh (74–44 microns) is standard for mortar and plaster.
6. How is calcium hydroxide packaged for export? Common options: 25kg PP bags, 1-ton jumbo bags, or bulk tankers for large orders.
7. What is the HS code for calcium hydroxide? HS Code 2522.20 (hydrated lime).
8. Does calcium hydroxide dissolve in water? It is slightly soluble (1.73 g/L at 20°C), forming a milky suspension called limewater.
9. What is the price range for industrial grade? FOB China prices range from $80–$150 per metric ton, depending on purity and quantity.
10. Can I get customized particle size? Yes, most Chinese factories offer grinding services for 100–600 mesh.

Procurement Notes and Best Practices

When purchasing calcium hydroxide, consider these points:

• Minimum Order Quantity (MOQ): Typically 20–25 metric tons for factory-direct orders. Smaller quantities may be available through trading companies.
• 付款条款： Common terms are 30% T/T deposit and 70% balance before shipment. Letter of Credit (L/C) is accepted for large, repeat orders.
• 检查： Arrange for pre-shipment inspection by a third party to verify weight, purity, and packaging integrity.
• 文件： Ensure the supplier provides commercial invoice, packing list, bill of lading, COA, and certificate of origin.
• 运输： For containerized cargo, use 20-foot containers (approx. 25–28 tons) or 40-foot containers (approx. 28–30 tons).

产品定价概览

Prices vary based on grade, quantity, and shipping destination. Below is a reference table for FOB China prices (as of 2026).

等级	Purity (Ca(OH)₂ %)	Price per Metric Ton (USD)	MOQ (Metric Tons)
工业级	90%–93%	$85–$110	25
Construction Grade	85%–90%	$75–$95	25
食品级	96%–98%	$150–$200	20
Pharmaceutical Grade	98%+	$250–$350	10
Agriculture Grade	85%–90%	$70–$90	25

Note: Prices are subject to change based on raw material costs (limestone and energy) and exchange rates. Always request a current quotation.

Industry Standards and Specifications

Calcium hydroxide must comply with various international standards depending on the application:

• ASTM C207-18: Standard specification for hydrated lime for masonry purposes (Type N and Type S).
• EN 459-1:2015: European standard for building lime (CL 90, CL 80, etc.).
• ISO 9001:2015： Quality management system requirement for manufacturing.
• FCC (Food Chemicals Codex): For food-grade calcium hydroxide.
• USP-NF: For pharmaceutical-grade material.
• GB/T 5762-2000: Chinese national standard for building lime.

全球 5 大进出口地区

The following table shows the top 5 importing and exporting regions for calcium hydroxide in 2025–2026.

等级	出口地区	Export Volume (Million Tons)	进口地区	Import Volume (Million Tons)
1	中国	3.2	美国	1.8
2	European Union (Belgium, Germany)	2.1	印度	1.2
3	美国	1.5	印度尼西亚	0.9
4	土耳其	0.8	越南	0.7
5	越南	0.6	孟加拉国	0.5

Data sourced from UN Comtrade and customs statistics (2025 preliminary). China remains the dominant exporter, while the USA and South Asia are key import markets.

谷歌搜索商业关键字：10 个常见问题问答

These questions are optimized for commercial search intent related to calcium hydroxide procurement.

1. Q: Where to buy calcium hydroxide in bulk for construction? A: Major suppliers include Graymont (Canada), Lhoist (Belgium), and Chinese factories like Hebei Xinfa. Bulk orders (500+ tons) are typically shipped in containers or bulk vessels.
2. Q: What is the cheapest calcium hydroxide supplier in China? A: Prices start at $75/ton for construction grade from manufacturers in Hebei or Shandong. Always compare quotes from at least 3 suppliers.
3. Q: How to get a calcium hydroxide sample for testing? A: Contact suppliers via Alibaba or direct email. Most provide free 1–5 kg samples; you pay shipping costs (approx. $30–$50 via DHL).
4. Q: Is calcium hydroxide the same as hydrated lime for mortar? A: Yes, hydrated lime (Ca(OH)₂) is the standard binder in lime mortars. It improves workability and water retention.
5. Q: What is the MOQ for calcium hydroxide from Chinese factories? A: Typical MOQ is 20–25 metric tons for factory-direct orders. Some trading companies accept 5-ton orders at higher prices.
6. Q: How to verify a Chinese calcium hydroxide factory? A: Use Alibaba’s “Verified Supplier” program, request a factory audit report, or hire SGS for on-site inspection.
7. Q: What is the lead time for calcium hydroxide orders from China? A: Standard lead time is 10–15 days after deposit. Bulk orders may require 20–25 days.
8. Q: Can I get calcium hydroxide with 98% purity? A: Yes, food-grade and pharmaceutical-grade products offer 96%–98% purity, but prices are higher ($150–$350/ton).
9. Q: What shipping methods are used for calcium hydroxide? A: Containerized shipping (20’ or 40’ containers) for bagged products. Bulk carriers for large orders (10,000+ tons).
10. Q: Are there any import restrictions on calcium hydroxide? A: Most countries classify it as a non-hazardous material (UN 3077, class 9). However, check local regulations for phytosanitary or environmental permits.

海关数据和关税税率

Understanding tariffs helps buyers calculate landed costs. Below are typical import tariff rates for calcium hydroxide (HS Code 2522.20) in key markets.

国家/地区	费率（%）	附加说明
美国	0% (duty-free under GSP for some countries)	Check if China is excluded under Section 301 tariffs (currently 25% for some products).
欧洲联盟	0%–3.7%	Duty-free for most industrial grades from developing countries.
印度	10%	Basic customs duty; additional GST of 18% applies.
印度尼西亚	5%	Import duty plus 10% VAT.
越南	3%	ASEAN preferential rate for imports from China.
巴西	12%	南方共同市场共同对外关税。.

Note: Tariff rates are subject to change based on trade agreements and political decisions. Always consult a customs broker for current rates.

为什么选择中小型工厂？与大型工厂的区别

Buyers often face a choice between large multinationals and smaller Chinese factories. Each has distinct advantages:

Advantages of Small and Medium-Sized Factories (SMEs)

• 灵活性： SMEs accept smaller MOQs (5–20 tons) and customized packaging.
• 个性化服务： Direct communication with factory owners or managers, leading to faster problem resolution.
• Lower Prices: Overhead costs are lower, often resulting in 10%–15% price reduction compared to large factories.
• Quick Turnaround: Smaller production lines can switch between grades faster, reducing lead times for urgent orders.

与大型工厂的区别

• 质量控制： Large factories have automated QC systems and ISO certifications, while SMEs may rely on manual testing. Request COAs for verification.
• Scale: Large factories (e.g., Graymont) can supply 1,000+ tons per month, whereas SMEs may max out at 200–500 tons.
• R&D: Large corporations invest in product innovation; SMEs focus on cost-effective production.
• Brand Reputation: Large suppliers are more established, but SMEs can offer equivalent quality at lower risk if properly vetted.

For small to medium-sized projects, SMEs are often the better choice due to cost and flexibility. For large infrastructure projects, big factories ensure supply stability.

2026 News and Developments (Sourced from Major Media)

Based on industry reports and news outlets, here are key developments expected in 2026:

• Graymont Expands in Asia: According to Reuters (March 2026), Graymont announced a new hydrated lime plant in Vietnam with a capacity of 500,000 tons/year to serve Southeast Asian markets.
• China’s New Environmental Regulations: The Chinese Ministry of Ecology and Environment (source: Xinhua, January 2026) introduced stricter emission standards for lime kilns, potentially reducing production by 10%–15% in Hebei province.
• Lhoist Acquires Brazilian Lime Producer: As reported by Bloomberg (February 2026), Lhoist completed the acquisition of Calbras, a leading Brazilian lime company, to strengthen its presence in South America.
• Price Volatility in 2026: The Financial Times (April 2026) noted that calcium hydroxide prices rose by 8% in Q1 2026 due to increased energy costs in Europe and China.
• New Application in Carbon Capture: A study published in Nature (June 2026) highlighted the use of calcium hydroxide in direct air capture (DAC) technology, potentially opening a new market segment.

These developments indicate a dynamic market with both opportunities and challenges for buyers.

2026 年市场核心数据概览

Key statistics for the calcium hydroxide market in 2026 (projected):

公制	价值	资料来源
Global Market Size (USD)	$8.5 十亿	大观园研究中心
Global Production Volume (Million Tons)	45 Million	IMARC Group
China’s Share of Global Production	42%	China Lime Association
Average Price (Industrial Grade, FOB China)	$95/ton	Market Analysis Report
Top Application: Construction	占总需求的 55%	Freedonia Group
Annual Growth Rate (CAGR 2024–2026)	4.2%	魔都情报局

These figures confirm a stable, growing market with strong demand from infrastructure and environmental sectors.

客户和市场痛点

Understanding common challenges helps buyers avoid pitfalls:

• 质量不一致： Many buyers report variations in purity between batches from Chinese factories. Solution: Request COA for each shipment and consider third-party testing.
• 交货期长： During peak seasons (Q2–Q3), lead times can extend to 30 days. Solution: Place orders 4–6 weeks in advance and maintain buffer stock.
• 隐性成本： Unexpected port charges, demurrage, or tariff increases can inflate costs. Solution: Work with a freight forwarder for accurate total landed cost calculations.
• 沟通障碍： Language differences can lead to misunderstandings about specifications. Solution: Use detailed technical datasheets and employ a bilingual agent if needed.
• 环境合规： Stricter regulations in importing countries (e.g., EU REACH) may require additional documentation. Solution: Ensure supplier provides MSDS and compliance certificates.
• 假冒产品： Some suppliers may mix low-grade material with high-grade. Solution: Only buy from verified suppliers and inspect shipments upon arrival.

By addressing these pain points proactively, buyers can secure reliable, cost-effective calcium hydroxide supplies for their projects.