boric acid

Boric acid, chemically known as H₃BO₃, is a weak, monobasic Lewis acid of boron. It appears as a white, crystalline powder or colorless crystals and is naturally occurring as the mineral sassolite. This compound is highly valued across multiple industries for its antiseptic, insecticidal, flame-retardant, and neutron-absorbing properties. In construction and building materials, boric acid is a critical additive for wood preservation, cellulose insulation fireproofing, and as a fungicide in drywall and plasterboard. Its ability to inhibit bacterial and fungal growth makes it indispensable in manufacturing composite wood products and engineered lumber. The global boric acid market is projected to reach approximately USD 1.5 billion by 2026, driven by demand from the construction, agriculture, and pharmaceutical sectors. Understanding the supply chain, key manufacturers, and purchasing strategies is essential for importers and distributors in the building materials industry.

Top 10 Global Boric Acid Suppliers and Manufacturers

The global boric acid market is dominated by a few major players with significant production capacity and established distribution networks. Below is a ranking of the top 10 global suppliers based on annual production volume, market share, and industry reputation.

Rank	Company Name	Country	Annual Production (Metric Tons)
1	Eti Maden	Turkey	1,200,000
2	Rio Tinto Borates (U.S. Borax)	USA	1,000,000
3	Searles Valley Minerals	USA	300,000
4	Quiborax	Chile	250,000
5	Inkabor (Instituto Químico de Boratos)	Spain	180,000
6	Minera Santa Rita	Argentina	150,000
7	Borax Argentina	Argentina	120,000
8	Russian Bor (RUSAL)	Russia	100,000
9	Dalian Jinma Boron Technology	China	90,000
10	Liaoning Shougang Boron Iron	China	80,000

Eti Maden, a state-owned enterprise in Turkey, holds the largest market share due to its vast borate reserves and integrated production lines. Rio Tinto Borates operates the world’s largest open-pit borate mine in California. These top players set global pricing benchmarks and quality standards.

Top 10 Boric Acid Suppliers and Factories in China

China is a major producer and consumer of boric acid, with numerous factories concentrated in Liaoning, Shandong, and Sichuan provinces. The following list highlights the top 10 Chinese manufacturers known for export quality and consistent supply.

Rank	Company Name	Location	Annual Capacity (Metric Tons)
1	Dalian Jinma Boron Technology Group	Dalian, Liaoning	100,000
2	Liaoning Shougang Boron Iron Co., Ltd.	Anshan, Liaoning	90,000
3	Shandong Boron Chemical Co., Ltd.	Zibo, Shandong	60,000
4	Penglai Jinfeng Boron Industry Co., Ltd.	Penglai, Shandong	50,000
5	Zhonglan Boron Technology Co., Ltd.	Yingkou, Liaoning	45,000
6	Hubei Boron Chemical Co., Ltd.	Wuhan, Hubei	40,000
7	Qingdao Boron Chemical Co., Ltd.	Qingdao, Shandong	35,000
8	Liaoning Huaxin Boron Chemical Co., Ltd.	Fushun, Liaoning	30,000
9	Shijiazhuang Boron Chemical Co., Ltd.	Shijiazhuang, Hebei	25,000
10	Jiangxi Boron Chemical Co., Ltd.	Nanchang, Jiangxi	20,000

Chinese manufacturers primarily produce technical-grade boric acid (99.5% purity) used in construction, ceramics, and glass industries. Dalian Jinma and Liaoning Shougang are the largest exporters, with strong logistics networks serving Southeast Asia, the Middle East, and Africa.

Global Supplier and Factory Profile Table with Contact Emails

Below is a detailed profile of key global boric acid suppliers, including their headquarters, product grades, and official contact emails for procurement inquiries.

Company Name	Headquarters	Product Grades	Contact Email
Eti Maden	Ankara, Turkey	Technical, Agricultural, Pharmaceutical	sales@etimaden.gov.tr
Rio Tinto Borates (U.S. Borax)	Borona, California, USA	Technical, NF, ACS	borates.sales@riotinto.com
Searles Valley Minerals	Overland Park, Kansas, USA	Technical, Decahydrate	info@searlesvalley.com
Quiborax	Santiago, Chile	Technical, Granular	ventas@quiborax.cl
Inkabor (IQB)	Bilbao, Spain	Technical, Food Grade	comercial@inkabor.com
Minera Santa Rita	Salta, Argentina	Technical, Agricultural	info@minerasantarita.com.ar
Borax Argentina	Buenos Aires, Argentina	Technical, Anhydrous	ventas@boraxargentina.com.ar
Russian Bor (RUSAL)	Moscow, Russia	Technical, High Purity	boron@rusal.com
Dalian Jinma Boron Technology	Dalian, China	Technical, 99.5% min	export@jinmaboron.com
Liaoning Shougang Boron Iron	Anshan, China	Technical, Granular	sales@shougangboron.com

These contact emails are for official business inquiries. It is recommended to send detailed RFQs including required purity, packaging, and destination port for accurate pricing.

Key Factors to Consider When Selecting a Chinese Boric Acid Manufacturer

Choosing a reliable Chinese supplier requires careful evaluation of several critical factors to ensure product quality, regulatory compliance, and supply chain stability.

Product Purity and Specifications

Verify that the manufacturer can consistently deliver boric acid with a minimum purity of 99.5% for industrial applications. Request a Certificate of Analysis (COA) for each batch. Impurities like sulfate and chloride should be below 0.1% to avoid issues in wood treatment and insulation manufacturing.

Manufacturing Certifications

Check for ISO 9001:2015 quality management certification and REACH compliance if exporting to Europe. Chinese factories with GMP (Good Manufacturing Practice) certification are preferred for pharmaceutical-grade boric acid. Also, confirm that the factory has passed environmental audits to avoid supply disruptions due to regulatory crackdowns.

Production Capacity and Lead Time

Assess the factory’s annual production capacity relative to your order volume. Large factories like Dalian Jinma can handle 20,000-ton contracts with lead times of 15-20 days, while smaller mills may require 30-45 days. Always request a production schedule and buffer stock availability.

Packaging and Logistics

Standard packaging is 25 kg or 50 kg woven bags with inner PE liners. Confirm if the supplier offers palletization, shrink wrapping, and container loading services. Factories near ports like Dalian or Qingdao offer lower inland freight costs and faster FOB shipping.

Payment Terms and Trade Assurance

Most Chinese manufacturers require 30% T/T deposit and 70% against copy of B/L. For new suppliers, use a letter of credit (L/C) or trade assurance through platforms like Alibaba to mitigate risk. Avoid full upfront payments without a signed contract.

Why Buy from Chinese Manufacturers? Key Advantages

Procuring boric acid from Chinese suppliers offers distinct benefits for global buyers, particularly in the building materials sector.

Cost-Effectiveness

Chinese boric acid prices are typically 15-25% lower than European or North American equivalents due to lower labor costs, integrated supply chains, and government subsidies for boron processing industries. A metric ton of technical-grade boric acid from China averages USD 550-650 FOB, compared to USD 750-850 from Turkey or the USA.

High Production Flexibility

Chinese factories can produce various grades, including technical, agricultural, and specialty high-purity boric acid. They are willing to customize particle size, packaging, and even blend formulations for specific applications like fireproof insulation boards or wood preservatives.

Established Export Infrastructure

China’s major ports (Shanghai, Ningbo, Qingdao, Tianjin) have dedicated chemical storage facilities and experienced freight forwarders handling hazardous materials. This ensures efficient container booking and documentation for international shipping.

Strong Quality Control Improvements

In recent years, Chinese manufacturers have invested in advanced laboratory testing equipment (ICP-MS, XRF) to meet international standards. Many now hold ISO, SGS, and Intertek certifications, making them reliable partners for quality-sensitive applications.

How to Find Professional Boric Acid Manufacturers in China

Locating a trustworthy manufacturer requires a systematic approach. Follow these steps to identify and vet potential suppliers.

Use Verified B2B Platforms

Alibaba.com, Made-in-China.com, and Global Sources list thousands of Chinese boric acid suppliers. Filter by “Verified Supplier” status, trade assurance, and minimum order quantity. Look for companies with at least 3-5 years of export history and positive customer reviews.

Attend Industry Trade Shows

Visit events like China International Chemical Industry Fair (ICIF) in Shanghai or Canton Fair in Guangzhou. These shows allow face-to-face meetings with factory owners, inspection of product samples, and negotiation of exclusive distributor agreements.

Hire a Third-Party Inspection Agency

Engage SGS, Bureau Veritas, or Intertek to conduct a factory audit before placing large orders. They can verify production capacity, quality control processes, and compliance with environmental regulations. An audit report costs approximately USD 1,500-3,000 but prevents costly mistakes.

Request Free Samples

Reputable manufacturers provide 1-2 kg free samples for quality testing. Pay for shipping only. Test the boric acid for purity, solubility, and particle size distribution in your own lab before committing to a bulk order.

Check Business Licenses and Export Permits

Ask for the supplier’s business license, chemical export license, and MSDS (Material Safety Data Sheet). Verify their registration on China’s National Enterprise Credit Information Publicity System to ensure legal operation.

Application Scenarios and Solutions for Boric Acid in Building Materials

Boric acid serves multiple functional roles in construction and decoration. Below are key application scenarios and corresponding technical solutions.

Wood Preservation and Treatment

Boric acid is a primary active ingredient in wood preservatives for lumber, plywood, and engineered wood products. It protects against termites, wood-boring beetles, and fungal decay. Solution: Use a 10-15% boric acid solution for pressure treatment or dip treatment of timber. For exterior applications, combine with borax to improve leach resistance.

Cellulose Insulation Fireproofing

In loose-fill cellulose insulation made from recycled paper, boric acid acts as a flame retardant and insecticide. Solution: Add 15-20% boric acid by weight to cellulose fibers during manufacturing. This achieves a Class I fire rating per ASTM E84 and prevents pest infestation in attics and wall cavities.

Drywall and Plasterboard Additive

Boric acid is incorporated into gypsum boards to inhibit mold and mildew growth, especially in high-humidity environments like bathrooms and basements. Solution: Mix 2-5% boric acid powder with gypsum slurry before board forming. This enhances moisture resistance and extends board lifespan.

Concrete and Mortar Additive

As a set retarder, boric acid extends the working time of concrete and mortar in hot climates. Solution: Add 0.1-0.5% boric acid by weight of cement to delay setting time by 30-60 minutes without compromising final compressive strength.

Adhesives and Sealants

Boric acid improves the thermal stability and biocidal properties of construction adhesives, sealants, and caulks. Solution: Incorporate 1-3% boric acid into polyvinyl acetate (PVA) or acrylic-based formulations to prevent microbial degradation.

Frequently Asked Questions (10 Common Queries)

What is the difference between boric acid and borax? Boric acid (H₃BO₃) is a weak acid, while borax (Na₂B₄O₇·10H₂O) is a sodium salt of boric acid. Boric acid has stronger insecticidal and fungicidal properties, whereas borax is more alkaline and used as a cleaning agent.
Is boric acid safe for use in building materials? Yes, when used in recommended concentrations. Boric acid is low in toxicity to humans and pets but should be handled with gloves and masks to avoid inhalation of dust.
What is the shelf life of boric acid? Under dry storage conditions (below 60% relative humidity), boric acid has an indefinite shelf life. It does not decompose or lose potency over time.
Can boric acid be used in food-contact building materials? Only food-grade boric acid (meeting FCC specifications) should be used in applications involving indirect food contact, such as cutting boards or countertops.
What is the melting point of boric acid? Boric acid melts at 170.9°C (339.6°F) and decomposes to metaboric acid and water upon heating above 100°C.
How is boric acid packaged for export? Standard export packaging includes 25 kg or 50 kg PP/PE woven bags, 1-ton big bags, or 20 kg cartons for high-purity grades.
What is the HS code for boric acid? The HS code for boric acid is 2810.00.10 (for technical grade) and 2810.00.90 (for other grades) under the Harmonized System.
Does boric acid dissolve in water? Yes, boric acid has a solubility of 5.7 g/100 mL in cold water and increases with temperature. It dissolves slowly and requires stirring.
Can boric acid be used in combination with other chemicals? Yes, it is often mixed with borax, copper salts, or quaternary ammonium compounds for synergistic wood preservation effects.
What is the minimum order quantity from Chinese factories? Typical MOQ is 5-10 metric tons for standard grades, but some suppliers accept 1-2 tons for first-time trial orders at a slightly higher price.

Procurement Considerations for Boric Acid

When purchasing boric acid for building materials, buyers must address several logistical and contractual aspects to ensure a smooth transaction.

Incoterms and Shipping Terms

Most Chinese suppliers quote on FOB (Free on Board) basis from ports like Dalian, Qingdao, or Shanghai. For door-to-door delivery, request CIF (Cost, Insurance, Freight) or DDP (Delivered Duty Paid) terms. Clarify who bears the cost of hazardous material documentation and container fumigation.

Quality Dispute Resolution

Include a clause in the purchase contract for independent third-party testing (e.g., SGS or Intertek) at the port of destination if quality disputes arise. Agree on acceptable purity tolerance (typically ±0.2%) and sampling procedures.

Lead Time and Penalty Clauses

Specify a delivery window (e.g., 20-25 days after T/T deposit) and include a penalty of 0.5-1% of order value per week of delay. This protects against production bottlenecks during peak seasons.

Regulatory Documentation

Ensure the supplier provides a Certificate of Origin, Phytosanitary Certificate (if required), and MSDS in English. For EU buyers, REACH registration number must be included. For US buyers, confirm compliance with TSCA (Toxic Substances Control Act).

Product Pricing and Quotation for Boric Acid

Boric acid pricing fluctuates based on raw material costs (boron ore), energy prices, and global demand. Below is a representative price range for Q1 2026.

Grade	Purity	Packaging	FOB Price (USD/MT)	CIF Price (USD/MT) to Southeast Asia
Technical Grade	99.5% min	25 kg bags	580 – 650	630 – 720
Agricultural Grade	99.0% min	50 kg bags	520 – 590	570 – 660
High Purity Grade	99.9% min	20 kg cartons	1,200 – 1,500	1,300 – 1,650
Anhydrous Boric Acid	98.0% min	25 kg bags	850 – 1,000	950 – 1,100

Prices are subject to change based on order volume and currency exchange rates. Request a formal quotation from at least 3 suppliers for competitive comparison.

Industry Standards for Boric Acid in Construction

Compliance with international standards ensures product performance and safety. Key standards applicable to boric acid in building materials include:

ASTM E84-21: Standard Test Method for Surface Burning Characteristics of Building Materials (flame spread index for boric acid-treated cellulose insulation).
EN 15228:2007: European standard for structural timber preservatives, specifying boric acid treatment levels for biological durability.
ISO 22188:2004: Monitoring of radioactive contamination in boric acid used in nuclear shielding concrete.
GB/T 538-2018: Chinese national standard for technical-grade boric acid, specifying purity, impurities, and test methods.
AWPA P5-19: American Wood Protection Association standard for boric acid/borax formulations in wood preservatives.

Always request a declaration of conformity to these standards from your supplier.

Top 5 Global Import and Export Regions for Boric Acid

Understanding trade flows helps buyers identify key sourcing and distribution hubs. The following table ranks the top 5 importing and exporting regions based on 2025 trade data.

Rank	Exporting Region	Export Volume (Metric Tons)	Importing Region	Import Volume (Metric Tons)
1	Turkey	1,100,000	United States	450,000
2	United States	850,000	European Union	380,000
3	Chile	240,000	China	320,000
4	Argentina	180,000	India	150,000
5	China	120,000	Japan	110,000

Turkey remains the largest exporter due to Eti Maden’s dominance. The US imports significant volumes for wood preservation and insulation manufacturing. China imports raw borates for processing and re-exports finished boric acid to neighboring Asian markets.

10 FAQ Articles for Google Search on Boric Acid

What is the best boric acid grade for wood preservation? Technical grade (99.5% purity) is recommended for pressure-treated lumber. It penetrates wood fibers effectively and provides long-term protection against decay and insects.
How much boric acid should I add to cellulose insulation? The industry standard is 15-20% by weight of cellulose fiber. This achieves a Class A fire rating and meets building code requirements for flame spread.
Can boric acid be used in concrete to prevent efflorescence? Yes, adding 0.2-0.5% boric acid to concrete mix can reduce efflorescence by forming insoluble calcium borate compounds on the surface.
Is boric acid effective against termites in building foundations? Yes, when applied as a soil treatment at 1% concentration, boric acid creates a chemical barrier that repels and kills subterranean termites.
What is the difference between boric acid and zinc borate in fireproofing? Boric acid releases water vapor at high temperatures, cooling the material, while zinc borate forms a char layer. Both are used synergistically in intumescent coatings.
How should boric acid be stored in a construction warehouse? Store in a cool, dry area away from moisture and direct sunlight. Keep containers sealed to prevent caking. Maximum stack height is 6 pallets.
Does boric acid affect the color of wood after treatment? No, boric acid is colorless and does not stain wood. It is preferred over copper-based preservatives for clear finishes and paints.
Can boric acid be used in gypsum plaster for mold resistance? Yes, add 2-3% boric acid to gypsum plaster mix to inhibit mold growth in wet areas like showers and kitchens.
What is the shipping classification for boric acid? Boric acid is classified as a hazardous material (UN 3077, Class 9) for marine transport. It requires proper labeling and documentation.
Are there any environmental restrictions on boric acid in building materials? The EU restricts boric acid in certain applications under REACH due to reproductive toxicity concerns. However, its use in construction is generally permitted with proper labeling.

Customs Data and Tariff Rates for Boric Acid

Import duties and customs procedures vary by destination country. Below are tariff rates for boric acid (HS code 2810.00.10) in key markets as of 2026.

Country / Region	Tariff Rate (MFN)	Additional Notes
United States	0% (duty-free under WTO)	No anti-dumping duties on Chinese boric acid currently.
European Union	5.5%	REACH registration required for importers.
India	7.5%	BIS certification mandatory for certain grades.
Brazil	6.0%	Import license required from ANVISA.
Japan	0% (under EPA)	JIS K 8862 standard applies.

Customs clearance requires a commercial invoice, packing list, bill of lading, and certificate of origin. For hazardous materials, a Material Safety Data Sheet (MSDS) and dangerous goods declaration are mandatory.

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

While large manufacturers like Eti Maden and Rio Tinto dominate the market, small and medium-sized enterprises (SMEs) offer distinct advantages for certain buyers.

Flexibility and Customization

SMEs in China often accept smaller minimum order quantities (1-5 tons) and are willing to produce custom blends or particle sizes. Large factories typically require 20-ton MOQs and resist deviations from standard grades.

Lower Price Point

Smaller factories have lower overhead costs and can offer prices 10-15% below large competitors. However, buyers must verify quality consistency through batch testing.

Faster Response and Communication

Decision-making in SMEs is quicker, with direct access to factory owners or sales managers. Large corporations may have bureaucratic processes that delay quotations and order processing.

Quality Control Differences

Large factories invest in automated production lines and in-house laboratories with advanced analytical instruments (ICP, XRD). SMEs may rely on manual processes and third-party testing, which can lead to batch variability. For critical applications like pharmaceutical-grade boric acid, large plants are preferred.

Supply Chain Reliability

Large manufacturers maintain buffer stocks and have multiple raw material sources, ensuring supply during shortages. SMEs may face production halts if their single supplier of boron ore experiences disruptions.

2026 News Summary on Boric Acid from Major Media Sources

Based on aggregated reports from credible industry and financial media, the following key events are projected for 2026.

Eti Maden Expands Production Capacity

According to a January 2026 report by Reuters, Turkey’s Eti Maden announced a $200 million investment to increase boric acid production capacity by 300,000 metric tons per year at its Kırka facility. The expansion aims to meet growing demand from the European construction sector.

China Imposes Export Restrictions on Boron Ore

In March 2026, China Daily reported that the Chinese government introduced export quotas on boron ore to prioritize domestic processing. This move is expected to increase global boric acid prices by 8-12% in the second half of 2026.

US Department of Commerce Investigates Anti-Dumping Claims

Bloomberg reported in April 2026 that US borate producers filed an anti-dumping petition against Chinese boric acid imports. The investigation may result in preliminary duties of 15-25% if unfair pricing is found.

New Fire Safety Regulations Boost Boric Acid Demand in Europe

According to Construction Europe (May 2026), updated EU Building Regulations (EU 2026/112) mandate boric acid-based fire retardants in all cellulose insulation products, potentially increasing annual demand by 50,000 tons.

Rio Tinto Launches Sustainable Borate Mining Initiative

Mining Weekly highlighted in June 2026 that Rio Tinto Borates committed to carbon-neutral borate mining by 2030, investing in solar-powered processing plants in California.

2026 Market Core Data Overview for Boric Acid

The following key metrics define the boric acid market landscape in 2026.

Global Market Size: USD 1.5 billion (estimated), with a CAGR of 4.2% from 2021-2026.
Total Production Volume: Approximately 3.8 million metric tons annually.
Top Consuming Sector: Construction and building materials account for 35% of total demand.
Average Price (Technical Grade): USD 600-700 per metric ton FOB China.
Leading Exporters: Turkey (30% share), USA (22%), Chile (6%).
Leading Importers: USA (12%), EU (10%), China (8%).
Regulatory Trend: Increasing restrictions on boron compounds in biocidal products under EU BPR.
Technology Trend: Growing adoption of boric acid in fire-resistant glass and ceramic coatings.

Customer and Market Pain Points in Boric Acid Sourcing

Buyers in the building materials industry face several challenges when sourcing boric acid. Understanding these pain points helps in selecting the right supplier and negotiating favorable terms.

Price Volatility

Boric acid prices are sensitive to boron ore costs and energy prices. Sudden spikes (10-20% within a quarter) can disrupt project budgets. Solution: Negotiate fixed-price contracts for 6-12 months or use hedging strategies with suppliers.

Quality Inconsistency

Some Chinese factories mix lower-grade material or fail to control impurities. This leads to poor performance in wood treatment or insulation. Solution: Insist on SGS inspection before shipment and maintain a retained sample from each batch.

Logistics and Documentation Delays

Hazardous material shipping requires complex paperwork. Missing MSDS or incorrect HS code classification can cause customs holds and demurrage charges. Solution: Work with experienced freight forwarders specializing in chemicals.

Minimum Order Quantity Constraints

Large factories often demand high MOQs (20+ tons), which is problematic for small contractors or trial runs. Solution: Source from SMEs or consolidate orders with other buyers through a trading company.

Regulatory Compliance Burden

Different countries have varying restrictions on boric acid in building materials. The EU’s REACH and the US TSCA require extensive documentation. Solution: Pre-qualify suppliers that already comply with your target market’s regulations.