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Von:Tobias Kind (
Betrifft:Reminder: EPI Suite with 103.000 structures and CAS Nos
View: (This is the only article in this thread) | Original Format
Datum:2001-09-10 13:50:03 PST
Dear Colleagues,

an "integrated approach" for GC-MS and LC-MS analysis
(small molecules) may improve our lab work - therefore
I recommend to use the freely available (copyrighted) EPA EPI suite:

It contains some 103.000 structures + CAS numbers (SMILECAS database)
and (PHYSPROP database) with around  25,000 compounds with
some experimental data (logP, bp, henry..) and you can also calculate
a lot of physico-chemical properties.

Instead of repeating all the important things from
I will pick out some things:

   AOPWIN - estimates atmospheric oxidation rates
   BCFWIN - estimates bioconcentration factor (BCF)
   BIOWIN - estimates biodegradation probability
   ECOSAR - estimates aquatic toxicity (LD50, LC50)
   HENRYWIN - estimates Henry’s law constant
   HYDROWIN - estimates aqueous hydrolysis rates (acid-, base-catalyzed)

   KOWWIN - estimates octanol-water partition coefficient
   MPBPWIN - estimates melting point, boiling point, and vapor pressure
   PCKOCWIN - estimates soil sorption coefficient (Koc)
   WSKOWWIN - estimates water solubility
   DERMWIN -  Dermal Permeability Program
   STPWIN - (Sewage Treatment Plant Fugacity Model)
   WVOLWIN - (Volatilization Rate from Water)
   LEVEL3NT - (Level III Fugacity Model)

* EPIWIN allows batch file input for a large number of compounds

* MPBWIN has an experimental database of
11347 compounds (8948 melting points, 6381 boiling points,
and 2857 vapor pressures) - this may be useful for retention time
fitting (assuming same class of compounds).

* KowWIN - contains a database of 13200 experimental log P values.
and also a algorithm for calculating unknowns via smiles structure
(Please take care: blind usage of calculated logP values is like walking
in a mine field:-)
further reading:

* I also recommend to read:
Identifying Unknowns with “Spectraless” Databases from James Little\TSCA_Poster%20Session.pdf
because it gives some important hints how mass spectra, mol masses,
formulas and databases can be linked together.

* Some rare EPIWIN examples for testing
Consul : (CAS 86479-06-3)
Transfluthrin: (CAS 118712-89-3)
Viridicatin (CAS 129-24-8) remember ?

With kind regards
Tobias Kind

P.S.: Thanks to U.S.EPA Office of Pollution Prevention Toxics
and Syracuse Research Corporation (SRC) and ...

P.P.S.: Try  the incredible CACTVS system at
It has enhanced features now - this is truly a state-of-the-art "open
database concept"
it has dozen of (multiple) input and output options. Try molsurf and

P.P.P.S.: Most molecular editors and some java applets import and export
If you have a CAS number you can now use SMILECAS or CHEMIDplus - later
Merlin or ISIS/Base or whatyouwant for a structural
similarity/substructure search.
After data retrieval you can search with the obtained structures
for similiar mass spectra or substructures using NIST MS search V2.0


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© 2002 Tobias Kind - - Alle Rechte vorbehalten.