Quantitative solubility data for the system 3-methylpentane (1) and water (2) have been reported in the publications listed in Table 1.

The original data in all of these publications are compiled in the data sheets immediately following this Critical Evaluation. For convenience, further discussion of this system will be divided into two parts.

1. THE SOLUBILITY OF 3-METHYLPENTANE (1) IN WATER (2)

Of the data reported for the solubility of 3-methylpentane in water (Table 1), the datum of Krzyzanowska and Szeliga (ref 4) has been excluded from consideration because it does not appear to have been obtained independently of that of Price (ref 3). The 298 K datum of Polak and Lu (ref 2) is much higher (ca. 30% relative) than all other reported values (ref 1, 3, 5). Furthermore, the value at 273 K, as with other hydrocarbons investigated by these authors, shows an unusually large increase over the value at 298 K. Thus the data of Polak and Lu (ref 2) are rejected. All the remaining data (all at 298 K) are listed in Table 2).

2. THE SOLUBILITY OF WATER (2) IN 3-METHYLPENTANE (1)

The solubility of water in 3-methylpentane has been reported only by Polak and Lu (ref 2) and thus no Critical Evaluation can be made. The interested user is referred to the relevant Data Sheet for solubility values. However, it can be noted that the data of Polak and Lu are generally close to 'Recommended' values in well-characterized systems.