What is a dalton a unit of measurement for?

A dalton is indeed a unit of measurement for mass and is used primarily in the fields of chemistry and molecular biology to express molecular weights. It is defined as one twelfth of the mass of a carbon-12 atom and is equivalent to approximately 1.66 x 10^-27 kilograms. This unit is particularly useful for expressing the mass of small particles, such as atoms and molecules, because these masses are extremely small and inconvenient to express in larger units like grams or kilograms. Therefore, using the dalton allows scientists to easily discuss the sizes and masses of biological macromolecules like proteins and nucleic acids in a standardized way, facilitating communication and understanding in scientific discourse.