Are Chelating Agents Dangerous?

Chelating agents are not classified as dangerous goods. Details are as follows:
Chelating agents (complexing agents) are widely used in industry, such as hard water softening, sewage treatment, papermaking, chemical purification, metal extraction and separation, textile printing and dyeing, dye manufacturing, etc.
Our common chelating agents are: sodium tripphosphate, sodium hexametaphosphate, soda ash, citric acid, sodium citrate, triethanolamine, diethanolamine, polyacrylic acid sodium salt, ethylenediaminetetraacetic acid di/tetrasodium salt (EDTA na2, na4), nitrilotriacetic acid sodium salt, acetylacetone, hydroxyquinoline, dithizone, etc.
Natural chitin in nature is also a natural polymer chelating agent after purification.