What are the key criteria for evaluating sodium acetate manufacturers in China?

What are the key criteria for evaluating sodium acetate manufacturers in China?
A practical checklist for supplier assessment covers eight dimensions: production scale (annual capacity above 10,000 tons is top tier), full compliance licenses including food additive production permits, product range spanning both anhydrous and trihydrate across industrial and food grades, documented quality metrics with third-party COA reports, packaging flexibility for domestic and export orders, responsive technical support for dosing adjustments, independent import-export qualifications, and a clean operational record without penalties. Leading suppliers in Shandong and Hebei maintain large buffer inventories, lock upstream acetic acid supply, and offer integrated purchasing of complementary chemicals like calcium formate or PAC. For wastewater buyers, verify COD equivalent and water insolubles; for food buyers, confirm heavy metal and microbial data meet national standards.