Bartek SOL-U-CAL (Calcium Fumarate Trihydrate) SOL-U-CAL: A Soluble Calcium Source with 19% Calcium.IFT Press Conference, July 14, 2003. SOL-U-CAL: Nueva Fuente de Calcio Soluble.Enfasis Alimentacion, 2003. Solubility of Calcium Fumarate vs pH with Different Acidulants.Presented at IFT 2005, New Orleans, USA.