• natural compounds or additives obtained from the natural ingredient (i)
• synthetic chemicals (ii)

CI 15985 Sunset Yellow FCF is a synthetic chemical product, an azo derivative, labelled as E110 in the list of food colours

The release of azo dyes in the environment is a concern due to the coloration of natural waters and the toxicity, mutagenicity and carcinogenicity of dyes and their biotransformation products. Methods and techniques have therefore been studied to remove this dye from the textile industry's waste water using microorganisms (1), activated carbon (2).

In May 2010, the FSA (Food Standard Agency) established guidelines for some dyes, including the E110: "When using the colors listed below in food and drink ) to include the additional information that "name or number of the color (s)": may have an adverse effect on activity and attention in children "(3).

Other studies

Functionalized cross-linked chitosan with ionic liquid and highly efficient removal of azo dyes from aqueous solution.  Lyu H, Fan J, Ling Y, Yu Y, Xie Z.  Int J Biol Macromol. 2019 Apr 1;126:1023-1029. doi: 10.1016/j.ijbiomac.2018.12.117. 

Photocatalytic degradation of synthetic food dye, sunset yellow FCF (FD&C yellow no. 6) by Ailanthus excelsa Roxb. possessing antioxidant and cytotoxic activity.  Deepika S, Harishkumar R, Dinesh M, Abarna R, Anbalagan M, Roopan SM, Selvaraj CI.  J Photochem Photobiol B. 2017 Dec;177:44-55. doi: 10.1016/j.jphotobiol.2017.10.015.

Estimate of the theoretical maximum daily intake of Sunset Yellow FCF by the Brazilian population.  Feitosa LCA, Rodrigues PDS, Da Silva AS, Rios AO, Cladera-Olivera F.  Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2017 May;34(5):687-694. doi: 10.1080/19440049.2017.1290829. Epub 2017 Feb 20.

Removal of sunset yellow FCF from aqueous solution using polyethyleneimine-modified MWCNTs.  Gao H, Zhang L, Liao Y.  Water Sci Technol. 2016;73(6):1269-78. doi: 10.2166/wst.2015.601.

References_________________________________________

(1) Decolorization and degradation of Disperse Blue 79 and Acid Orange 10, by Bacillus fusiformis KMK5 isolated from the textile dye contaminated soil.
Kolekar YM, Pawar SP, Gawai KR, Lokhande PD, Shouche YS, Kodam KM.
Bioresour Technol. 2008 Dec.
(2) Perspectives on carbon materials as powerful catalysts in continuous anaerobic bioreactors.
Pereira RA, Salvador AF, Dias P, Pereira MF, Alves MM, Pereira L.
Water Res. 2016 Sep.

(3) FSA - Guidance on the labelling of certain food colours as set out in Regulation 1333/2008