Use of carotenoid (ester)s

A composition comprising:

• a) a compound selected from the group consisting of isozeaxanthin, isozeaxanthinmonoalkanoylesters, isozeaxanthindialkanoylesters and mixtures thereof;
• b) a compound selected from the group consisting of alkyl nitrates, nitrooxy esters of alkoxy substituted aliphatic alcohols, organic peroxides and mixtures thereof;
• d) a stabilizing compound;
• and
• e) optionally a solvent.

A composition comprising:

• a) a compound selected from the group consisting of astaxanthin monoalkanoylesters, astaxanthindialkanoylesters, isozeaxanthin monoalkanoylesters and isozeaxanthindialkanoylesters and mixtures thereof;
• b) 2-ethylhexyl nitrate and/or di-t-butyl peroxide;
• d) a stabilizing compound selected from the group consisting of 6-ethoxy-2,2,4-trimethyl-1H-quinoline, 2,6-di-t-butyl-4-methylphenol and 3-tert-butyl-4-methoxyphenol and mixtures thereof;
• and
• e) optionally toluene.

A composition comprising:

• a) a compound selected from the group consisting of isozeaxanthin monoalkanoylesters and isozeaxanthindialkanoylesters and mixtures thereof;
• b) 2-ethylhexyl nitrate;
• d) 6-ethoxy-2,2,4-trimethyl-1H-quinoline;
• and
• e) optionally toluene.

A composition comprising:

• a compound selected from the group consisting of astaxanthindialkylesters, astaxanthinmonoalkanoylesters, astaxanthindialkanoylesters, iso-zeaxanthin, iso-zeaxanthindialkylesters, iso-zeaxanthinmonoalkanoylesters, iso-zeaxanthindialkanoylesters and mixtures thereof;
• a fuel;
• and
• at least one fatty acid and/or fatty ester having a carbon chain of 16 carbon atoms or greater.