Source High Purity Oxalic Acid for Dyeing, Cleaning, and Marble

Strategic Sourcing Guide for High Purity Oxalic Acid

Procuring high purity oxalic acid requires a disciplined approach that balances technical specifications with supply chain reliability. As a dicarboxylic acid and inorganic acid, oxalic acid presents unique handling and application challenges that demand precise verification from the outset. Buyers must navigate a market where product attributes vary significantly between agricultural, food, and industrial grades. This guide outlines the critical factors for sourcing this chemical, focusing on the specific characteristics observed in the current market, including its appearance as a white powder, its volatility, and its classification as a strong acid. The objective is to equip procurement professionals with the knowledge to validate supplier claims and ensure the material meets the rigorous demands of their specific industrial processes.

Technical Specifications and Chemical Identity

The foundation of any successful procurement strategy lies in a clear understanding of the chemical's identity and physical properties. High purity oxalic acid is fundamentally a polyatomic acid, specifically categorized as a dicarboxylic acid. Its chemical structure dictates its behavior in various environments, making the verification of its molecular identity paramount. The primary identifier for this substance is the CAS number 144-62-7. While some listings may reference the name "Oxalic Acid" or model numbers like "QY2026-02," the CAS number remains the definitive standard for chemical identification across global trade.

Physical properties serve as the first line of defense against counterfeit or substandard products. The observed market data indicates that the product typically appears as a white powder. However, buyers must verify the state of the material, as some specifications list it as a solid catalyst or a stabilized acid. The melting point is a critical thermal characteristic, with reliable data pointing to a range of 189-191°C. Deviations from this range can indicate impurities or incorrect chemical composition. Similarly, the boiling point is recorded at 365.1°C at 760 mmHg, and the flash point is approximately 188.8°C. These thermal thresholds are essential for determining safe storage conditions and processing parameters.

Solubility is another defining attribute. High purity oxalic acid is soluble in water and ethanol but insoluble in benzene. This solubility profile is crucial for applications involving aqueous solutions or specific solvent-based extraction processes. The density is noted at 0.99 g/ml at 25°C, a figure that buyers should use to verify the concentration of bulk shipments. Furthermore, the acid strength is classified as a strong acid, and it is often described as a volatile acid in certain contexts, though its stability is also noted as "stabilized acid" in specific grades. Understanding these conflicting or complementary attributes is vital for selecting the right grade for the intended application.

Compliance, Certification, and Grade Verification

In the chemical industry, the term "high purity" is not a standalone guarantee; it must be backed by specific grade certifications and quality control documentation. The market data reveals a divergence in grades, with products available as both Food Grade and Industrial Grade. For applications in the food industry or pharmaceuticals, the Food Grade certification is non-negotiable. Conversely, applications in dyeing, printing, or marble treatment may utilize Industrial Grade materials, provided the purity meets the specific process requirements.

Buyers must rigorously verify the Quality Control (QC) documentation provided by suppliers. Standard documentation should include Test Data Sheets (TDS), Material Safety Data Sheets (MSDS), and Certificates of Analysis (COA). The presence of Halal and Kosher certifications is a specific observation in the market, indicating that some suppliers cater to religious dietary requirements, which is a significant differentiator for food-grade procurement. Additionally, ISO certification is a common expectation, though the specific standard (such as ISO 9001) should be confirmed rather than assumed.

The purity level is a critical compliance metric. Market observations suggest purity levels can reach 99.6%, a figure that should be explicitly stated on the COA. Buyers should not rely on general descriptions of "high purity" without a numerical value. The source of the acid also plays a role in compliance; some products are derived from hydrolysis, while others are produced via oxidation. The origin of the raw material can influence the impurity profile, making it essential to trace the production method.

Cost Drivers and Pricing Dynamics

The pricing of oxalic acid is influenced by a complex interplay of factors, including grade, packaging, and supply chain logistics. The observed price range in the market is between 250 and 1000 USD, though this variance is likely driven by the specific grade (Food vs. Industrial), the quantity ordered, and the packaging type. Industrial Grade products generally command a lower price point compared to Food Grade or specialized grades required for high-precision applications.

Packaging is a significant cost driver. The market offers various packaging options, including paper bags, woven bags, and plastic woven bags. The standard unit size is often 25kg per bag, but variations such as 1mt bags or customized packaging are available. The choice of packaging affects both the unit cost and the logistics expenses. For instance, paper bags may be more economical for small shipments but offer less protection against moisture compared to woven or plastic bags. Customization of packaging, often labeled as "Accept OEM," can add to the cost but may be necessary for specific client branding or handling requirements.

Minimum Order Quantity (MOQ) also impacts the effective cost per unit. The observed MOQ range is between 1 and 25 units, suggesting flexibility for small buyers but potentially higher per-unit costs for smaller orders. Buyers should negotiate based on volume, as larger orders often unlock better pricing tiers. Additionally, the origin of the product, typically China or specific regions like Cangzhou, influences freight costs and lead times. Transport terms, often listed as "as Customer," mean that the buyer bears the responsibility for logistics, which can significantly alter the total landed cost.

Typical Applications and Industry Usage

Oxalic acid is a versatile chemical with applications spanning multiple industries. Its primary use in dyeing and printing is well-documented, where it serves as a mordant or a reducing agent. In the stone and marble industry, it is used for cleaning and polishing, leveraging its ability to remove rust and mineral deposits. The classification of the product as an "Inorganic Acid" and "Dicarboxylic Acid" makes it suitable for these specific chemical reactions.

Beyond these traditional uses, the acid is employed in the production of other chemicals and as a catalyst in various industrial processes. Some market data describes the product as a "Solid Catalyst" with "Positive Catalyst" usage, indicating its role in accelerating chemical reactions without being consumed. This application is particularly relevant in manufacturing processes where reaction efficiency is critical. The "Agriculture Grade" designation suggests its use in soil treatment or as a component in agricultural formulations, although this grade may differ significantly in purity from the Food Grade variant.

The application industry is broadly categorized as "Industry," but the specific sector dictates the required purity and certification. For example, a dyeing manufacturer may require Industrial Grade with a specific purity level, while a food processing facility must strictly adhere to Food Grade standards. Buyers must align their procurement with the specific application requirements to avoid purchasing over-specification or, worse, under-specification of the material.

Supplier Evaluation and Quality Control Protocols

Evaluating suppliers for oxalic acid requires a multi-faceted approach that goes beyond price comparisons. The availability of customization options, such as OEM packaging and tailored specifications, is a strong indicator of a supplier's flexibility and capability. However, buyers must verify that these customizations do not compromise the chemical integrity of the product. The "Stabilized Acid" attribute suggests that some suppliers offer products with added stability, which is crucial for long-term storage and transport.

Quality control protocols are the backbone of supplier reliability. Buyers should demand a comprehensive QC package that includes Halal, Kosher, ISO, TDS, MSDS, and COA documents. The absence of any of these documents should be a red flag. Furthermore, the supplier's ability to provide detailed test results for key parameters like melting point, boiling point, and purity is essential. The observation of a melting point of 189-191°C and a purity of 99.6% should be used as a benchmark against which supplier samples are tested.

The origin of the product, often cited as China or Cangzhou, should be verified to ensure it aligns with the buyer's geopolitical and logistical preferences. While the location is a fact, the supplier's track record in that region is the true metric of reliability. Buyers should assess the supplier's history of delivering consistent quality, their responsiveness to quality issues, and their ability to maintain the "as Customer" transport terms without compromising the product's condition during transit.

Long-Term Procurement Considerations

Sourcing oxalic acid is not a one-time transaction but a long-term relationship that requires strategic planning. The volatility of the acid and its classification as a strong acid necessitate careful consideration of storage and handling protocols over the lifecycle of the supply agreement. Buyers should establish clear communication channels with suppliers regarding changes in production methods, such as shifts between hydrolysis and oxidation sources, as these can impact the final product quality.

The flexibility of the supply chain is another critical factor. The ability of suppliers to accept OEM packaging and customize the product model (e.g., QY2026-02) allows buyers to adapt to changing market demands. However, this flexibility must be balanced with the need for consistency. Buyers should negotiate contracts that lock in quality standards and pricing structures while allowing for volume adjustments.

Finally, the environmental and safety implications of sourcing oxalic acid should not be overlooked. As a strong acid with specific thermal properties, the supplier's adherence to safety standards and environmental regulations is crucial. Buyers should ensure that the supplier's operations align with their own corporate sustainability goals and that the product's lifecycle, from production to disposal, is managed responsibly. By focusing on these long-term considerations, buyers can build a resilient supply chain that ensures the consistent availability of high-purity oxalic acid for their critical operations.

Comparative Analysis of Product Attributes

To facilitate decision-making, the following table summarizes the key attributes observed in the market, highlighting the variations that buyers must navigate.

This comparison underscores the importance of verifying specific attributes against the buyer's requirements. A product listed as "Agriculture Grade" may not be suitable for "Dyeing and Printing" if the impurity profile differs, even if the chemical name is the same. Buyers must use this matrix to filter suppliers and ensure the selected product matches their exact operational needs.