When selecting inorganic chemical suppliers, there are several essential certifications and documents that must be considered. Here are the key ones:

Basic Qualifications
- Business License: This proves the legal right to operate and ensures that the supplier’s business scope includes the inorganic chemicals you intend to purchase. It must be valid and up-to-date.
- Tax Registration Certificate: This verifies the supplier’s tax registration status and ensures they are in good standing with tax authorities.
- Organization Code Certificate: This confirms the supplier’s unique organizational identity. For companies with a unified social credit code, only the business license with this code is required.

Quality and Management System Certifications
- ISO 9001 Quality Management System Certification: Indicates that the inorganic chemical suppliers has a comprehensive quality management system in place, ensuring the stability and consistency of product quality.
- ISO 14001 Environmental Management System Certification: Demonstrates the inorganic chemical suppliers’ commitment to environmental protection and compliance with environmental regulations.

Industry-Specific Certifications
- Production License: For certain specific inorganic chemicals, especially those classified as hazardous chemicals, the supplier must have a production license.
- Safety License: Suppliers involved in the production of hazardous chemicals must also possess a safety license.
- Product Appraisal Certificate or Quality Inspection Report: These documents prove that the inorganic chemicals supplied meet relevant quality standards.

Financial and Credit-Related
- Bank Account Certificate or Bank Credit Reference: These are used to assess the supplier’s financial status and financial strength.
- Good Commercial Credit Commitment Letter: The inorganic chemical suppliers should provide a letter committing to maintaining good commercial credit.

Other Important Certifications
- VAT General Taxpayer Certificate: If the purchaser requires VAT special invoices for tax deduction purposes, the inorganic chemical suppliers must provide this certificate.
- Special Industry Certifications: For inorganic chemicals used in specific industries, such as electronics, additional industry-specific standards or certifications may be required.

Additional Notes
- Validity of Certifications: All certifications and qualification documents must be valid and up-to-date. Expired certificates should be promptly renewed.
- Industry-Specific Requirements: Depending on the specific use and industry of the inorganic chemicals you are purchasing, there may be additional specific qualifications or certifications required.