Synthetic Dyes are ingredients often derived from carcinogenic petrochemical derivativesiii and are used as colouring agents for many different products on the market. Common types of synthetic dyes are known as 'azo dyes'. Synthetic dyes come from non-renewable resources; can be eye, skin and lung irritants and can also release carcinogenic amines, as well as contributing to environmental pollutioniv.
iii) IARC Coal Tar Pitch
iv) Textile dyeing industry an environmental hazard