Dortmund Data Bank

Activity Coefficients at Infinite Dilution

The experimental data shown in these pages are freely available and have been published already in the DDB Explorer Edition. The data represent a small sub list of all available data in the Dortmund Data Bank. For more data or any further information please search the DDB or contact DDBST.


No. Formula Molar Mass CAS Registry Number Name
1 H2O 18.015 7732-18-5 Water
2 C5H9NO 99.133 872-50-4 N-Methyl-2-pyrrolidone
Search the DDB for all data of this mixture

N-Methyl-2-pyrrolidone solved in Water

Temperature [K] Activity Coeff. at Inf. Dil. Measurement Method Source
298.85 0.3700 OTHR 1
308.45 0.6000 OTHR 1
318.05 0.8600 OTHR 1

List of measurement methods

Short Term Explanation
OTHR other techniques

List of References

1 Trampe D.B.; Eckert C.A.: A Dew Point Technique for Limiting Activity Coefficients of Nonionic Solutions. AIChE J. 39 (1993) 1045-1050


Activity Coefficients at Infinite Dilution of Water+N-Methyl-2-pyrrolidone
See larger image

Activity Coefficient at Infinite Dilution Data Overview