Source Stone Cleaning Oxalic Acid Powder for Mining, Leather, and Dyeing

Stone Cleaning Oxalic Acid Powder Sourcing Guide

Procuring oxalic acid powder for stone cleaning requires a nuanced understanding of its chemical behavior and industrial applications. This dicarboxylic acid, also known as ethanedioic acid, is widely utilized for removing rust stains, mineral deposits, and mortar residue from marble, granite, and other natural stone surfaces. Buyers must recognize that while it is effective for cleaning, its acidic nature demands careful handling to prevent surface etching or damage to sensitive stone types. The product is typically supplied as a white powder with a density of approximately 1.772 g/cm³, ensuring consistent dosing and mixing ratios for professional cleaning solutions.

The sourcing landscape for this chemical is dominated by suppliers in China, particularly in regions like Shandong and Tianjin, which offer significant production capacity. Buyers should note that the product is classified as an organic acid with varying grades, including agricultural and industrial standards. It is crucial to verify the specific purity levels, which often range from 96% to 99.6%, as higher purity ensures more predictable cleaning results and fewer impurities that could leave residues on the stone. Understanding these baseline characteristics helps in selecting the right grade for specific cleaning tasks, whether for light maintenance or heavy industrial stain removal.

Product Scope and Observed Listing Signals

Market listings for oxalic acid powder reveal a diverse range of product attributes that buyers must carefully evaluate. Common observations include the product appearing as a white powder, packaged in 25kg bags or drums, with some suppliers offering customized packaging solutions. The observed price range in USD spans from 1 to 888, reflecting variations in purity, quantity, and supplier positioning. Minimum order quantities (MOQ) typically range from 1 to 25 units, providing flexibility for both small-scale contractors and large industrial buyers. These signals indicate a competitive market where buyers can negotiate terms based on volume and specific quality requirements.

Suppliers often highlight key attributes such as the product’s solubility in water and ethanol, which is critical for preparing effective cleaning solutions. The product is described as a volatile acid with a melting point between 101-102ºC and a boiling point of 365.10 ºC, information that is vital for storage and handling protocols. Some listings specify the product as a non-oxidizing acid, while others classify it as oxidizing, a distinction that impacts safety data sheets and transportation regulations. Buyers should cross-reference these claims with the supplier’s technical documentation to ensure consistency and accuracy, as conflicting information can lead to logistical or safety issues during procurement.

Technical Specifications to Verify

Verifying technical specifications is paramount when sourcing oxalic acid powder for stone cleaning applications. Buyers should confirm the molecular weight, which is typically 90.03, and the carboxyl number, often listed as a dicarboxylic acid. The acidity level is described as medium-strong, which influences its effectiveness in dissolving mineral deposits. It is essential to verify the purity percentage, with common standards being 99% or 99.6%, as lower purity may contain impurities that affect cleaning performance. Additionally, buyers should check the alkyl number, which may be listed as saturated or unsaturated, although this is less critical for stone cleaning than for other chemical applications.

The physical properties of the powder, such as its color and appearance, should be consistent with high-quality industrial standards. Buyers must verify the solubility characteristics, ensuring the product is soluble in water and ethanol but insoluble in benzene, which aids in formulation. The density of 1.772 g/cm³ is a key metric for calculating correct dosages. Furthermore, the source of the acid, often through hydrolysis, can impact the final product’s consistency. Buyers should request detailed technical data sheets that confirm these parameters, ensuring that the product meets the specific requirements for their stone cleaning processes and avoids potential issues with inconsistent results.

Compliance and Safety Documentation

Compliance and safety documentation are critical components of sourcing oxalic acid powder, given its chemical nature and potential hazards. Buyers must ensure that suppliers provide comprehensive safety data sheets (MSDS) that detail handling, storage, and emergency procedures. The product is assigned an UN number of 3261, which is essential for proper transportation and regulatory compliance. Certifications such as ISO9001, SGS, and COA are commonly cited, indicating adherence to quality management systems and independent verification of product standards. These documents are not just formalities but vital tools for ensuring workplace safety and regulatory adherence.

Buyers should also verify the product’s classification regarding oxidation and stability, as some listings describe it as a stabilized acid while others note it as labile. This information impacts storage conditions and shelf life. The flash point of 188.79 ºC and boiling point of 365.10 ºC are critical for determining safe handling temperatures. Additionally, the product’s volatility as a weak acid requires specific ventilation and protective equipment during use. Ensuring that all safety documentation is up-to-date and accurate helps mitigate risks associated with chemical handling and ensures that the procurement process aligns with international safety standards and local regulations.

Cost Drivers and Commercial Terms

Understanding the cost drivers and commercial terms is essential for effective procurement of oxalic acid powder. The observed price range of 1 to 888 USD reflects variations in purity, packaging, and order volume. Buyers should consider the minimum order quantity (MOQ), which ranges from 1 to 25 units, as this impacts the unit price and overall cost efficiency. Customization options, such as specific packaging or purity levels, may incur additional costs but can provide significant value for specialized applications. Suppliers often offer flexible commercial terms, including customized packaging and standard specifications, which can be negotiated to suit specific buyer needs.

The port of loading, typically Qingdao, Tianjin, or Shanghai, influences shipping costs and lead times. Buyers should factor in logistics expenses when evaluating the total cost of ownership. The production capacity of suppliers, often around 5000mt/month, indicates their ability to meet large orders consistently. However, buyers should verify lead times and availability to ensure timely delivery. Negotiating favorable payment terms and volume discounts can further optimize costs. By carefully analyzing these commercial factors, buyers can secure competitive pricing while maintaining quality and reliability in their supply chain.

Supplier Qualification and Quality Control

Supplier qualification and quality control are vital for ensuring the reliability and consistency of oxalic acid powder supplies. Buyers should prioritize suppliers with established certifications such as ISO9001, SGS, and COA, which demonstrate a commitment to quality management and product verification. The origin of the product, often from China Mainland or specifically Shandong, should be verified to ensure traceability and compliance with international standards. Suppliers with a reputation for providing high-purity products, such as 99.6% oxalic acid, are preferable for critical stone cleaning applications where consistency is key.

Quality control measures should include regular testing of product attributes such as purity, density, and solubility. Buyers should request sample batches for preliminary testing to verify that the product meets their specific requirements. Additionally, suppliers should provide detailed information on their production processes, including the source of the acid and any purification steps. Establishing a clear communication channel with the supplier for addressing quality issues is also important. By rigorously qualifying suppliers and implementing robust quality control protocols, buyers can minimize risks and ensure a steady supply of high-quality oxalic acid powder for their operations.

Long-Term Procurement Checks

Long-term procurement checks are necessary to maintain the integrity and efficiency of the oxalic acid powder supply chain. Buyers should conduct periodic audits of supplier performance, focusing on consistency in product quality, delivery times, and compliance with safety standards. Regular review of safety data sheets and certifications ensures that suppliers remain up-to-date with regulatory changes. Additionally, buyers should monitor market trends and price fluctuations to anticipate cost changes and adjust procurement strategies accordingly. Building strong relationships with reliable suppliers can lead to better terms and priority service during high-demand periods.

Continuous improvement in procurement processes involves evaluating the effectiveness of current quality control measures and identifying areas for enhancement. Buyers should gather feedback from end-users regarding product performance in stone cleaning applications to inform future purchasing decisions. Regularly updating supplier qualification criteria and conducting risk assessments help mitigate potential disruptions. By implementing a structured approach to long-term procurement checks, buyers can ensure a stable, cost-effective, and high-quality supply of oxalic acid powder, supporting their operational goals and maintaining competitive advantage in the market.