Metachrome yellow is a dye.

584-42-9

C13H9N3NaO5

310.22

RV 1;Acid Chrome Yellow 2GW;Alizarin Yellow GG;Java Unichrome Yellow GT;C.I. 14025;Metachrome yellow

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years