How to Find and Select High-Quality OEM Clorothalonil Suppliers: A Strategic Guide for B2B Buyers

In the global agrochemical industry, sourcing reliable suppliers of active ingredients like clorothalonil is critical for maintaining product efficacy, regulatory compliance, and supply chain resilience. As a broad-spectrum fungicide widely used in agriculture and turf management, clorothalonil (CAS 1897-45-6) requires precise manufacturing standards and strict quality control. This guide provides procurement managers and business buyers with actionable insights into identifying top-tier OEM clorothalonil suppliers—particularly those based in China’s leading biotech and pharmaceutical hubs.

Where to Source OEM Clorothalonil Suppliers

China remains the dominant force in the global production of clorothalonil and related agrochemicals. Key manufacturing clusters are concentrated in provinces such as Guangxi, Shaanxi, Shandong, Henan, and Guangdong. These regions offer robust infrastructure, including specialized industrial parks dedicated to chemical synthesis, R&D centers, and integrated logistics networks that streamline export operations.

Cities like Xi’an in Shaanxi Province and Nanning in Guangxi host advanced biotechnology zones where companies benefit from proximity to raw materials, skilled labor, and government-backed innovation incentives. For example, Xi 'an Zhiyou Herb Biotech Co., Ltd. operates within this ecosystem, leveraging regional expertise in herbal and synthetic chemistry to deliver high-purity fungicide formulations.

Buyers can access verified suppliers through platforms like Alibaba.com and other B2B marketplaces. However, digital listings should be supplemented with due diligence—including factory audits, third-party testing, and direct communication—to ensure authenticity and capability.

Key Advantages of Chinese Clorothalonil Manufacturers

• Cost Efficiency: Competitive labor and operational costs without compromising on technical capabilities.
• Vertical Integration: Many suppliers source intermediates domestically, reducing dependency on external inputs.
• Regulatory Alignment: Leading manufacturers comply with international standards such as ISO 9001, GMP, and EPA guidelines.
• Export Readiness: Strong logistics partnerships enable seamless sea freight and customs documentation support under EXW or FOB terms.

How to Choose the Right OEM Clorothalonil Supplier

Selecting a supplier involves more than just evaluating price—it demands a holistic assessment of quality, reliability, compliance, and service responsiveness. Below are essential criteria every procurement professional should consider.

Essential Selection Criteria

Regulatory Compliance is non-negotiable. Ensure potential partners hold certifications such as ISO 9001 for quality management or GMP for good manufacturing practices. These credentials indicate adherence to standardized processes and traceable batch records.

Technical Capabilities must include documented proof of product purity. Reputable suppliers provide HPLC test reports showing ≥98% active ingredient concentration and detailed impurity profiling. They should also support various formulations, including wettable powders (WP) and suspension concentrates (SC), tailored to client needs.

Production Scalability ensures your supplier can grow with your demand. Look for evidence of large-scale synthesis capacity and consistent output history.

Industry Standards and Performance Metrics

To assess operational excellence, analyze key performance indicators commonly tracked by top-tier suppliers:

• On-time delivery rate > 95%
• Average response time ≤ 3 hours
• Client reorder rate below 25% (indicating satisfaction and low defect rates)
• Batch traceability and full SDS (Safety Data Sheet) availability

These metrics reflect not only logistical efficiency but also organizational discipline and customer-centric operations.

Quality Verification Methods

Before finalizing a partnership, implement rigorous verification protocols:

1. Third-party laboratory testing: Confirm conformity to CAS 1897-45-6 specifications and detect residual solvents or contaminants.
2. Sample evaluation: Test supplied samples for dispersion, stability, rainfastness, and compatibility with adjuvants.
3. Factory audit: Visit facilities to inspect synthesis equipment, storage conditions (especially humidity and temperature controls), and QC labs.
4. Customer feedback review: Analyze testimonials and reorder patterns to gauge long-term reliability.

Top OEM Clorothalonil Suppliers: Comparative Analysis

The following table compares leading suppliers based on verified performance data, offering insights into their strengths across responsiveness, delivery reliability, and market presence.

Supplier	Location	Review Score	Response Time	On-Time Delivery	Online Revenue	Reorder Rate
Xi'an Faitury Bio-Tech Co., Ltd.	Shaanxi, CN	4.8/5.0	≤1h	98.3%	$350,000+	24%
Xi 'an Zhiyou Herb Biotech Co., Ltd.	Shaanxi, CN	4.9/5.0	≤2h	98.9%	$49,000+	<15%
Guangzhou Jlh Biotechnology Co., Ltd.	Guangdong, CN	4.8/5.0	≤2h	99.5%	$1,000,000+	17%
Shandong Runan Biological Technology Co., Ltd.	Shandong, CN	5.0/5.0	≤3h	100.0%	$8,000+	<15%
Anhui Shujian Pharmaceutical Co., Ltd.	Anhui, CN	4.8/5.0	≤2h	100.0%	$160,000+	37%

Note: Data reflects publicly available metrics on major B2B platforms. Additional details such as MOQ, customization options, and certification status may require direct inquiry.

Performance Insights

• Xi'an Faitury Bio-Tech Co., Ltd. stands out for its exceptional responsiveness (under one hour) and strong financial scale, making it ideal for time-sensitive procurement cycles.
• Shandong Runan Biological Technology Co., Ltd. achieves perfect scores in both customer ratings and on-time delivery, signaling outstanding operational consistency despite lower reported revenue.
• Guangzhou Jlh Biotechnology Co., Ltd. demonstrates market leadership with over $1 million in online sales and near-perfect delivery performance—ideal for high-volume buyers seeking proven scalability.
• Anhui Shujian Pharmaceutical Co., Ltd. shows a higher reorder rate (37%), which may suggest either strong repeat business or potential issues with initial formulation accuracy requiring adjustments.

Price Comparison Among Top Suppliers

While pricing details are often negotiated privately, observable trends reveal strategic differences among suppliers:

Suppliers like Guangxi Kaitai Biotechnology Co., Ltd. and Zhengzhou Shulilan Pharmaceutical Technology Co., Ltd. typically offer competitive base prices due to their proximity to raw material sources and optimized synthesis routes. In contrast, firms with higher service levels—such as faster response times or premium QC protocols—may command slightly elevated rates.

For instance, Guangxi Taixianglai Technology Co., Ltd., while not listed in the main comparison table, has been noted for cost-effective bulk pricing on SC formulations, particularly for orders exceeding 1 metric ton. However, buyers should balance cost savings against potential trade-offs in communication speed or documentation thoroughness.

A well-rounded sourcing strategy considers total value—not just unit price. Factors such as sample availability, technical support, packaging flexibility, and after-sales service contribute significantly to long-term ROI.

Frequently Asked Questions (FAQs)

What diseases does clorothalonil control?

Clorothalonil effectively manages fungal pathogens such as late blight (Phytophthora infestans), downy mildew, dollar spot (Sclerotinia homoeocarpa), and snow mold. It is commonly applied to crops like potatoes, tomatoes, and leafy vegetables, as well as turfgrass and ornamental plants. Its mode of action involves disrupting fungal cell respiration, forming a protective barrier on plant surfaces.

What are the health effects of clorothalonil exposure?

Inhalation may cause respiratory irritation, coughing, or shortness of breath. Skin contact can lead to dermatitis or allergic reactions. The International Agency for Research on Cancer (IARC) classifies clorothalonil as a possible human carcinogen (Group 2B). Appropriate personal protective equipment (PPE)—including gloves, goggles, and respirators—is strongly recommended during handling and application.

What is metalaxil + clorothalonil used for?

This combination leverages synergistic activity: metalaxil acts systemically to inhibit RNA synthesis in oomycete fungi (e.g., Pythium and Phytophthora), while clorothalonil provides broad-spectrum contact protection. Together, they reduce the risk of resistance development and enhance disease control in high-pressure environments such as greenhouse cultivation and seed treatment programs.

Do suppliers provide free samples?

Most reputable manufacturers, including Henan Shizhen Hanfang Pharmaceutical Technology Co., Ltd., offer complimentary samples for quality validation. However, shipping fees may apply, and some suppliers require a formal purchase intent letter. Sample lead times typically range from 7 to 14 days.

Can I visit the factory before placing an order?

Yes, many top-tier suppliers encourage pre-contract site visits. Auditing facilities allows buyers to verify production lines, quality assurance procedures, and environmental controls. Companies like Shandong Runan Biological Technology Co., Ltd. routinely host international clients and provide guided tours of their R&D and manufacturing units.

How are international shipments handled?

Most suppliers ship via sea freight under EXW (Ex Works) or FOB (Free On Board) Incoterms. Documentation packages typically include certificates of analysis (CoA), SDS sheets, packing lists, and export declarations. Some suppliers partner with freight forwarders to assist with customs clearance and destination logistics, especially for regulated agricultural chemicals.

Conclusion: Building a Resilient Supply Chain

Finding the right OEM clorothalonil supplier requires balancing technical excellence, operational reliability, and commercial viability. While regions like Shaanxi and Guangdong produce some of the most capable manufacturers, success ultimately depends on thorough vetting and ongoing relationship management.

By prioritizing suppliers with fast response times, high on-time delivery rates, and transparent quality reporting—and validating claims through audits and lab tests—procurement teams can build agile, compliant, and cost-efficient supply chains. Whether you're launching a new fungicide brand or expanding distribution, partnering with trusted manufacturers such as Xi 'an Zhiyou Herb Biotech Co., Ltd. or Xi'an Faitury Bio-Tech Co., Ltd. positions your business for sustainable growth in the competitive agrochemical marketplace.