| CHEMO-IN | and CHEMO-OUT | QUANTITIES | | |
| Item No. | Name | Symbol | Definition | Remarks |
| 14-9.1 | mass density, density fr masse (f) volumique | ρ | mass divided by volume | See ISO 80000-4, item 4-2. |
| 14-9.2 | mass concentration of B fr concentration (f) en masse de B | ρB | mass of B divided by the volume of the mixture, also indicated as B | |
| 14-9.3 | energy fr énergie (f) | E | all kinds of energy | |
| 14-9.4 | Avogadro constant fr constante (f) d'Avogadro | L, NA | number of elementary entities divided by amount of substance NA= N/n See 14.5.12.a | N≈A 6,022 141 79 (30) × 10^23 mol^-1 (CODATA 2006) See ISO 80000-9, item 9-4. |
| 14-9.5 | osmotic pressure fr pression(f) osmotique | Π | excess pressure required to maintain osmotic equilibrium between a solution and a pure solvent separated by a membrane permeable only to the solvent | See ISO 80000-9, item 9-26. |
| 14-9.6 | ionic strength fr force (f) ionique | I | the ionic strength of a solution is defined as I= (1/2) ∑zi^2mi where the summation is carried out over all ions with charge number zi and molalities mi. | |
| 14-9.7 | electrolytic conductivity fr conductivité(f) | κ, σ | electrolytic current density divided by the electric field strength | See ISO 80000-6, item 6-42. |
| 14-9.8 | olfactory threshold fr seuils (m) de l'olfaction | Ŧo | thresholds for the concentrations of various classes of smell that can be detected | This includes detection by the human nose and other sensors. Thresholds depend on the nature of the odour. Tables exist giving the values of thresholds, but are outside the Scope of this part of ISO/IEC 80000. |
| 14-9.9 | gustatory thresholds fr seuils (m)de la gustation | Ŧg | thresholds for classes of taste that can be detected by the human mouth and thresholds of sensitivity to foods, drinks and other substances | The subjective intensity of taste for a number of solutions (sweet, salt, bitter, sour) increases as a power function of the concentration (slopes range between 1,0 and 1,3). Over wide ranges of molar concentration, the taste sensations may change. Thresholds depend on the nature of the substance being tasted. Classifications of types of taste exist in other publications, but are outside the Scope of this part of this part of ISO/IEC 80000. |
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