Final Development Support Documents (DSDs)
DSDs detail how Effects Screening Levels (ESLs), inhalation Reference Values (ReVs), and inhalation Unit Risk Factors (URFs) were derived for specific chemicals. This page also links to Fact Sheets which summarize information used by the TCEQ Toxicology Division to develop those values.
Click on the substance name to view its DSD. Click on “Fact Sheet” to view summary information about the substance.
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Take a closer look at Fact Sheets
| Substance Name | Chemical Abstract Service Registry Number (CASRN) |
Public Comments | Date of Last Significant Revision |
| Acrolein |
107-02-8 | No | November 2010 |
| Benzene |
71-43-2 | Yes | October 2007 |
| Butadiene, 1,3- |
106-99-0 | Yes | August 2008 |
| Butene, 1- |
106-98-9 | Yes | April 2008 |
| Butene, 2- cis and trans cis-butene, -2 trans-butene, -2 |
107-01-7 590-18-1 624-64-6 |
Yes | April 2008 |
| Butoxyethanol |
111-76-2 | Yes | October 2007 |
| Butyl acetate, n |
123-86-4 | Yes | December 2010 |
| Chromium (All Compounds Except Hexavalent Chromium) Elemental Chromium Trivalent Chromium |
7440-47-3 16065-83-1 |
No | October 2009 |
| Dichlorobenzene, 1,4- |
106-46-7 | No | February 2009 |
| Dichloroethylene, 1,1- |
75-35-4 | No | October 2007 |
| Ethylbenzene |
100-41-4 | No | November 2010 |
| Ethylene |
74-85-1 | Yes | April 2008 |
| Formaldehyde |
50-00-0 | Yes | August 2008 |
| Hexane, n- |
110-54-3 | No | October 2007 |
| Hydrogen Chloride |
7647-01-0 | Yes | October 2009 |
| Hydrogen Fluoride and Other Soluble Inorganic Fluorides |
7664-39-3 | Yes | October 2009 |
| Isobutene |
115-11-7 | Yes | April 2008 |
| Methacrolein |
78-85-3 | No | October 2009 |
| Methyl Amyl Ketone |
110-43-0 | No | October 2007 |
| Methyl Ethyl Ketone |
78-93-3 | No | November 2010 |
| Methylene Chloride |
75-09-2 | No | June 2011 |
| Nickel and Inorganic Nickel Compounds Nickel Nickel Sulfate Nickel Subsulfide Nickel Oxide Nickel Chloride |
7440-02-0 7786-81-4 12035-72-2 1313-99-1 7718-54-9 |
Yes | June 2011 |
| Pentane, All Isomers n-Pentane Isopentane Neopentane |
109-66-0 78-78-4 463-82-1 |
Yes | July 2011 |
| Pentenes 1-pentene c-2-pentene t-2-pentene |
109-67-1 627-20-3 646-04-8 |
No | October 2007 |
| Silica, Amorphous and Other Non-Crystalline Forms fused precipitated silica and silica gel pyrogenic colloidal silica silica fume synthetic amorphous silica uncalcined diatomaceous earth |
60676-86-0 112926-00-8 112945-52-5 69012-64-2 7631-86-9 61790-53-2 |
Yes | July 2011 |
| Silica, Crystalline Forms cristobalite quartz tridymite tripoli |
14464-46-1 14808-60-7 15468-32-3 1317-95-9 |
Yes | October 2009 |
| Styrene |
100-42-5 | Yes | August 2008 |
| Tetrachloroethylene(PCE) |
127-18-4 | Yes | April 2008 |
| Texanol |
25265-77-4 | Yes | April 2008 |
| Toluene |
108-88-3 | Yes | April 2008 |
| Trichloroethane, 1,1,1- |
71-55-6 | No | June 2011 |
| Vinyl Chloride |
75-01-4 | No | February 2009 |
| Vinylcyclohexene, 4- |
100-40-3 | Yes | July 2011 |
| Xylenes mixture m-Xylene o-Xylene p-Xylene |
1330-20-7 108-38-3 95-47-6 106-42-3 |
Yes | February 2009 |
