Nonylphenol Ethoxylates (NPE’s)
They are chemical substances used primarily in the manufacture of cleaning products (such as detergents) and also in the production of natural and synthetic textiles. This substance causes hormonal interruptions in humans (with the risk of impairing fertility). In the fauna it affects mainly the fish causing changes through which the males become females.
Currently this substance is regulated by the European Union.
Phthalates
Phthalates or esters of phthalaic acid are a group of chemical compounds used as plasticizers, substances added to plastics to increase their flexibility.
One of their most common uses is the conversion of polyvinyl chloride, PVC, from a hard to a more flexible plastic. They are also used as solvents in perfumes, nail polish, adhesives, putties and children toys.
Regarding their effects, they can be harmful for the kidneys, among many others, especially if an allergy is detected. They are also known to have caused liver cancer in mice.
Azo Dyes
Chemical substances used to dye clothes. These substances can break down releasing aromatic amines, and thus decreasing the probability of getting cancer through contact between textile fibers and the human skin.