Abstract
Summary.Pigment with the characteristics of a naphthaquinone is widely distributed throughout the body of the echinoid Diadema antillarum. Chromatography indicates that there is a main reddish orange pigment sometimes accompanied by small amounts of a purple pigment.The purified main pigment crystallises in red needles which melt at 223°C, sublime about 200°C, and in acidified ether show absorption maxima at 263/64: 337/39: 462/63 mμ. It appears to be a hydroxynaphthaquinone resembling echinochrome A.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
