<unk>  is considered a high-osmolality contrast agent. Its osmolality ranges from approximately 1500 mOsm/kg (50% solution) to over 2000 mOsm/kg (76% solution).
Diatrizoate
Dichloroacetic acid
Orthosilicic acid
Phospho soda
Triheptanoin
Hermaphrodite 
Thiamylal
Lactitol