There are many things in leather products, such as real leather clothes, real leather bags, genuine leather sofas, etc. These genuine leather products will give people a natural, high-end, and atmospheric feeling. Do leather products also contain formaldehyde? Everyone is puzzled, how could leather, which is clearly the skin of animals and is pure natural, contain formaldehyde? Today, the editor of CCL Shiding will tell you that leather products generally contain formaldehyde, and if the odor is too strong, it may also exceed the standard.
How does formaldehyde come from leather products?
The presence of formaldehyde in leather is related to its production process, and leather products require anti-corrosion, sterilization, and color fixation treatment, which requires the use of formaldehyde. Leather processing also requires a tanning process, and aldehyde tanning process mainly involves the nucleophilic addition reaction between the amino or imino groups on collagen molecules and the carbonyl groups on formaldehyde molecules to achieve cross-linking, which may also lead to the release of formaldehyde. Leather products also require various processes such as dyeing, coating, spraying, and fixing, among which film forming agents, colorants, and fixing agents are required. These processes inevitably contain formaldehyde.
From the various processes mentioned above, leather products also contain formaldehyde. It is important to note that formaldehyde is not easily volatilized after being "wrapped" and may not be completely dispersed for several years. Therefore, leather products must also be tested and protected, so that we can use them with more peace of mind. Chemical performance testing: formaldehyde content testing, aromatic amine dye testing, hexavalent chromium content testing, prohibited azo dye testing, pentachlorophenol content testing, pH value, odor testing, harmful substance limit, free fatty acid content, total lead content, total cadmium content, heavy metal testing, tetrachlorophenol content testing, o-phenylphenol content testing, alkylphenol polyethylene glycol content testing, and phthalate content testing.
