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Updated Database

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 1

NIST 08 includes a fully evaluated collection of electron-ionization mass spectra. It is the product of a 21-year effort by a team of experienced mass spectrometrists in which each spectrum has been examined for correctness. This release contains an expanded MS/MS Library and new Retention Index data.What's New in v.2.0g distributed with NIST 11

Contents of the NIST/EPA/NIH (NIST 11) Mass Spectral Library
Library Name Library Description Library Contents
mainlib Main EI MS library 212,961 spectra
replib Replicate spectra 30,932 spectra
nist_msms and nist_msms2 MS/MS Library 95,490 spectra of > 16,000 ions
nist_ri Retention Index Library 346,757 Kovats RI values for 70,835 compounds

NIST Standard Reference Database 23

Version 9.0 expands the capability of the REFPROP database.

New features include:  

Additional pure fluids and updated equations of state and transport equations, including cyclopentane, R-1234yf, and R-1234ze(E). 

The number of binary mixtures with interaction parameters has increased from 303 to 639, including many mixtures of ethylene, propylene, methanol, ethanol, toluene, benzene, cyclohexane, sulfur dioxide, ammonia, dodecane, acetone, and butylene.

Expanded support for natural gas systems, including the addition of the GERG-2008 mixture model for natural gas fluids, which includes binary interaction parameters for the following fluids: argon, butane, carbon monoxide, carbon dioxide, decane, ethane, helium, heptane, hexane, hydrogen, hydrogen sulfide, isobutane, isopentane, methane, nitrogen, nonane, octane, oxygen, pentane, propane, and water.

Convergence along the saturation lines is now better for complex mixtures due to new algorithms for finding phase boundaries and the addition of analytical derivatives in the calculation of the fugacity. 

Calculation of net and gross heating values for natural gas systems.

Additional pure fluid equations can be loaded in memory that are not included in a selected mixture.  

New plots that show deviations between the GERG-2008 equation and the AGA-8 natural gas mixture models. 

New Release Version 3.4
SRD 31 NIST-ACerSPhase Equilibria Diagrams Database

The Phase Equilibria Diagrams Database contains commentaries and 24,800 diagrams for non-organic systems, including those published in all 21 hard-copy volumes produced as part of the ACerS-NIST Phase Equilibria Diagrams Program: hard-copy Volumes I through XIV ("blue books"); Annuals 91, 92, 93; High Tc Superconductors I & II; Zirconium & Zirconia Systems; and Electronic Ceramics I. Materials covered include oxides as well as non-oxide systems such as chalcogenides and pnictides, phosphates, salt systems, and mixed systems of these classes.


NIST Standard Reference Subscription Database 3 Web Thermo Tables (WTT) - Professional Edition

WTT - Professional Edition, a Web version of the TRC Thermodynamic Tables, represents a complete collection of critically evaluated thermodynamic property data primarily for pure organic compounds. As of September, 2007, WTT contains information on 7765 compounds.  

Created February 9, 2012, Updated June 2, 2021