DL-isocitric acid trisodium is the trisodium salt of isocitric acid. Isocitric acid is the isomer of citric acid. The isocitric acid is an important substrate in the central metabolic pathway, citric acid cycle (TCA cycle) inside organisms. Since it is an organic acid found in most fruit juices, it is commonly used as a marker to evaluate the authenticity and quality of fruit products, most often citrus juices in food industry.
https://en.wikipedia.org/wiki/Isocitric_acid
https://secure.megazyme.com/files/Booklet/K-ISOC_DATA.pdf
white to almost white crystalline powder
Isocitric acid is the protonated analogue of isocitrate, a substrate of the citric acid cycle.
ChEBI: Isocitric acid, DL- is a carbonyl compound.