PARTICLE, CONTRAST MEDIUM FOR OPTOACOUSTIC IMAGING HAVING THE PARTICLE, AND CONTRAST MEDIUM FOR SENTINEL LYMPH NODE

摘要

PROBLEM TO BE SOLVED: To provide a particle wherein a hydrophilic pigment having an anionic functional group such as ICG can hardly leak out.SOLUTION: Provided is a particle that contains: a pigment having an anionnic functional group such as ICG; a multivalent metal ion such as an iron ion (Feor Fe) and a zinc ion; and a polyol compound.