Import Basic Chromium Sulphate — Buy in wholesale FOB from Supplier in China

Basic chromium sulphate, also known as chromium powder, is a complex tanning agent supplied by Gansu Qiyuan Chromate-chemical Production Co. from Jiayuguan, Gansu Province. The chemical formula is Cr(OH)nSO0.5(3-n) with a molecular weight of 165.07, and the supplier specifies a basicity of 33%. The material presents as a green powder with high solubility in water, comprising mainly hydrated basic chromium sulphate complexed with sodium sulfate. The supplier's quality standard references QB/T2413-1998, with Chrome Oxide (Cr2O3) content varying across grades from 25% to 40% depending on the specific product variant selected.

The QB/T2413-1998 standard governs Chinese domestic production of basic chromium sulphate, specifying maximum water insolubles at 0.10% and iron (Fe3+) content capped at 0.10% across all grades. Hexavalent chromium (Cr6+) is limited to 3 ppm, a critical parameter for environmental and worker safety compliance in tanneries. The 33% basicity indicates a moderately complexed species that offers balanced tanning performance: sufficient cationic charge for collagen fixation yet controlled reactivity to prevent surface fixation or uneven dye uptake. Standard packaging is 25 kg bags, typical for bulk chemical distribution to leather processors. The green colour arises from Cr(III) hydroxo-sulfato complexes, and the high water solubility ensures rapid dissolution in tanning floats without requiring extended mixing cycles.

This material finds primary application in chrome tanning and retanning of bovine, ovine, and caprine hides, where it cross-links collagen carboxyl groups to confer thermal stability and resistance to putrefaction. It is purchased by tanneries, leather chemical distributors, and vertically integrated footwear and automotive upholstery manufacturers. Buyers should confirm the specific Cr2O3 grade required for their tannage type: higher grades (40% Cr2O3) suit heavy leather applications, while lower grades suffice for garment and light leather. The supplier notes non-hazardous goods classification for transport, though standard PPE (protective gloves, safety glasses, dust mask) is mandatory during handling. Storage requires a well-ventilated, dry, cool warehouse; any spillage should be neutralised with calcium oxide immediately.

Gansu Qiyuan Chromate-chemical Production Co., Limited is located in the West Suburb of Jiayuguan, Gansu Province, China (postal code 735100). The company holds a Harbor trust tier on the platform, with a recorded response rate of 0.00% and zero average response hours, indicating the supplier has not yet engaged with buyer enquiries through the platform's messaging system. No verification badges, trade assurance levels, or third-party audit credentials are indicated in the available profile data. The supplier's specialisation is implied by its product offering: basic chromium sulphate for leather tanning, a niche within inorganic chromium chemistry.

The profile does not disclose factory size, annual output, number of employees, year of establishment, export markets served, or named clients. No ISO certifications, environmental management systems, or leather industry-specific accreditations (such as LWG compliance) are mentioned. Buyers must independently verify production capacity, quality control protocols, and the supplier's experience with export documentation for chemical shipments. The Gansu location places the facility in northwest China, distant from major coastal ports; this geographic factor may influence logistics planning and inland freight costs for international buyers.