The approximate solubility of a substance is not always given as a specified number of parts; sometimes the solubility is described by a phrase instead. These phrases are defined in the British Pharmacopeia 1988. Click on the phrases to read the meaning.
Phrases
Meaning
very soluble
less than 1 part
freely soluble
from 1 to 10 parts
soluble
from 10 to 30 parts
sparingly soluble
from 30 to 100 parts
slightly soluble
from 100 to 1000 parts
very slightly soluble
from 1000 to 10,000 parts
practically insoluble
more than 10,000 parts