The NIST Standard Reference Data Group is continuously adding to its sets of evaluated numeric data by updating current databases and developing new databases. The interactive access, available for many products, is also updated on a regular basis.
NIST Standard Reference Database Database 1a
NIST/EPA/NIH Mass Spectral Library with Search Program (Data Version: NIST 11, Software Version 2.0g)
This database is the product of a multiyear, comprehensive evaluation and expansion of the world's most widely used mass spectral reference library.
(available ONLY from distributors)
|Contents of the NIST 11 Mass Spectral and Retention Index Libraries|
|Library Description||Library Name||Library Contents|
|NIST/EPA/NIH Mass Spectral Library (EI)|
|Main EI MS library||mainlib||212,961 spectra|
|Replicate EI MS spectra||replib||30,932 spectra|
MS/MS Library 2012
|nist_msms and nist_msms2||121,586 Spectra of 15,180 ions|
|GC Method / Retention Index Library|
|Retention Index Library||
|346,757 Kovats RI values for 70,835 compounds|
NIST Standard Reference Subscription Database 202 Web Thermo Tables (WTT) - Lite Edition
This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package. As of November, 2010, WTT - Lite Edition contains information on 150 commonly-used compounds and access to a total of 86407 evaluated experimental data points.
NIST Standard Reference Subscription Database 203 Web Thermo Tables (WTT) - Professional Edition
This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package. As of November, 2011, WTT - Professional Edition contains information on 23399 compounds and access to a total of 512538 evaluated experimental data points. This product also provides critically evaluated data for some non-molecular species such as radicals and organic salts carried from the TRC Thermodynamic Tables published from 1942-2009.
The NIST Ceramics WebBook was updated July 2015.
NIST Standard Reference Database 23 NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP): Version 9.1
REFPROP 9.1 has replaced the NIST 12 and 14 databases
New Features of REFPROP Version 9.1
Enhancements have been made to most areas of the NIST REFPROP program, including the graphical interface, the Excel spreadsheet, the Fortran files (i.e., core property routines), the sample programs in C++, MatLab, VB, etc., and additional fluids. The number of enhancements has been substantial, with some of the more important ones listed below:
- Convergence along the saturation lines is now much better and faster for complex mixtures due to new algorithms for finding phase boundaries, the addition of analytical derivatives in the calculation of the fugacity, and spline curves to provide initial inputs to the phase boundary routines.
- The FORTRAN code was organized to be threadsafe and allow multi-core processing.
- A 64-bit version of the DLL is available for use with Excel or Matlab.
- The addition of the following fluids: cyclopentane, diethyl ether, ethylbenzene, hydrogen chloride, isooctane, isopropanol, m-xylene, Novec649, o-xylene, p-xylene, RE143a, R40, RE1216, RE245cb2, RE245fa2, RE347mcc, R1233zd.
- The equations of state have been revised for benzene, cyclohexane, deuterium, dimethyl carbonate, ethanol, helium, R161, and R1234ze.
- Transport equations have been added or modified for many of the fluids, including: hydrogen, Novec649, parahydrogen, deuterium, isooctane, benzene, toluene, SO2, hexane, heptane, RE347mcc, R236fa, R236ea, R245fa, SF6, ethanol, water, and all of the siloxanes.
- MatLab routines now use the Refprop DLL directly and can be directly modified.
- Additional plots for analyzing equations of state are available.