intrinsic viscosity

of a polymer
Synonym: limiting viscosity number
https://doi.org/10.1351/goldbook.I03140
The limiting value of the reduced viscosity, η i c or the inherent viscosity, η inh, at infinite dilution of the polymer, i.e. \[[\eta] = \lim _{c\rightarrow 0}\frac{\eta _{\text{i}}}{c}=\lim _{c\rightarrow 0}\eta _{\text{inh}}\]
Notes:
  1. This term is also known in the literature as the Staudinger index.
  2. The unit must be specified; \(\text{cm}^{3}\ \text{g}^{-1}\) is recommended.
  3. This quantity is neither a @V06627@ nor a pure number. The term is to be looked on as a traditional name. Any replacement by consistent terminology would produce unnecessary confusion in the polymer literature. Synonymous with limiting viscosity number.
Source:
Purple Book, 1st ed., p. 63 (http://old.iupac.org/publications/books/author/metanomski.html)