molecularWeight
A Schema.org Property
This term is in the "new" area - implementation feedback and adoption from applications and websites can help improve our definitions.
This is the molecular weight of the entity being described, not of the parent. Units should be included in the form '<Number> <unit>', for example '12 amu' or as '<QuantitativeValue>.
Values expected to be one of these types
Source
http://www.bioschemas.org/MolecularEntity