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.

Files linked from this page are in Portable Document Format (PDF) .
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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 Fact Sheet	107-02-8	No	November 2010
Benzene Fact Sheet	71-43-2	Yes	October 2007
Butadiene, 1,3- Fact Sheet	106-99-0	Yes	August 2008
Butene, 1- Fact Sheet	106-98-9	Yes	April 2008
Butene, 2- cis and trans cis-butene, -2 trans-butene, -2 Fact Sheet	107-01-7 590-18-1 624-64-6	Yes	April 2008
Butoxyethanol Fact Sheet	111-76-2	Yes	October 2007
Butyl acetate, n Fact Sheet	123-86-4	Yes	December 2010
Chromium (All Compounds Except Hexavalent Chromium) Elemental Chromium Trivalent Chromium Fact Sheet	7440-47-3 16065-83-1	No	October 2009
Dichlorobenzene, 1,4- Fact Sheet	106-46-7	No	February 2009
Dichloroethylene, 1,1- Fact Sheet	75-35-4	No	October 2007
Ethylbenzene Fact Sheet	100-41-4	No	November 2010
Ethylene Fact Sheet	74-85-1	Yes	April 2008
Formaldehyde Fact Sheet	50-00-0	Yes	August 2008
Hexane, n- Fact Sheet	110-54-3	No	October 2007
Hydrogen Chloride Fact Sheet	7647-01-0	Yes	October 2009
Hydrogen Fluoride and Other Soluble Inorganic Fluorides Fact Sheet	7664-39-3	Yes	October 2009
Isobutene Fact Sheet	115-11-7	Yes	April 2008
Methacrolein Fact Sheet	78-85-3	No	October 2009
Methyl Amyl Ketone Fact Sheet	110-43-0	No	October 2007
Methyl Ethyl Ketone Fact Sheet	78-93-3	No	November 2010
Methylene Chloride Fact Sheet	75-09-2	No	June 2011
Nickel and Inorganic Nickel Compounds Nickel Nickel Sulfate Nickel Subsulfide Nickel Oxide Nickel Chloride Fact Sheet	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 Fact Sheet	109-66-0 78-78-4 463-82-1	Yes	July 2011
Pentenes 1-pentene c-2-pentene t-2-pentene Fact Sheet	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 Fact Sheet	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 Fact Sheet	14464-46-1 14808-60-7 15468-32-3 1317-95-9	Yes	October 2009
Styrene Fact Sheet	100-42-5	Yes	August 2008
Tetrachloroethylene(PCE) Fact Sheet	127-18-4	Yes	April 2008
Texanol Fact Sheet	25265-77-4	Yes	April 2008
Toluene Fact Sheet	108-88-3	Yes	April 2008
Trichloroethane, 1,1,1- Fact Sheet	71-55-6	No	June 2011
Vinyl Chloride Fact Sheet	75-01-4	No	February 2009
Vinylcyclohexene, 4- Fact Sheet	100-40-3	Yes	July 2011
Xylenes mixture m-Xylene o-Xylene p-Xylene Fact Sheet	1330-20-7 108-38-3 95-47-6 106-42-3	Yes	February 2009

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