Bottle of solution of sodium dodecyl sulfate for use in the laboratory. The critical micelle concentration (CMC) in pure water at 25 Â°C is 8.2 mM, and the aggregation number at this concentration is usually considered to be about 62. The micelle ionization fraction (Î±) is around 0.3 (or 30%).
Definition: A pure substance is a sample of matter with both definite and constant composition with distinct chemical properties.
Here are all the possible meanings and translations of the word substances. Editors Contribution(0.00 / 0 votes)Rate this definition: substances. Plural of substance. The human bone has a substance to it which can be defined like the rest of the human body is is composed of a variety of different substances.