{"aspect_id":"AS41","aspect_name":"volumetric-mass-density","aspect_reference":null,"aspect_symbol":"\\rho","name":"volumetric-mass-density milligram per litre","scale_id":"SC1182","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"\\rho mg.l-1","unit_id":"UN1224","unit_name":"milligram per litre","unit_reference":null,"unit_symbol":"mg.l-1"}