Pyrophosphate

Pyrophosphate, also known as diphosphate, is a chemical compound with the formula \( \text{P}_2\text{O}_7^{4-} \) or \( \text{PPi} \). It consists of two phosphate groups linked by a high-energy bond. Pyrophosphate plays a crucial role in biochemistry, particularly in energy metabolism and the synthesis of nucleotides.