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.

NEWThe Tert-Butyl Alcohol DSD is now final

Click on the substance name to view its DSD. Click on “Fact Sheet” to view summary information about the substance.

Definitions of ESLs, REVs & AMCVs

Files linked from this page are in Portable Document Format (PDF) .
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A B C D E F G H I J K L M N O P R S T U V W X Y Z

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments	Date Finalized Revision Date(s) if applicable
Acetone Fact Sheet	67-64-1	Yes	December 18, 2013 September 1, 2015-Odor
Acrolein Fact Sheet	107-02-8	Yes	November 19, 2010 March 14, 2014-chronic ReV September 14, 2015-24 hr and Odor February 4, 2016-Short-term ESL
Acrylonitrile Fact Sheet	107-13-1	Yes	December 18, 2013 September 14, 2015-Odor
Ammonia Fact Sheet	7664-41-7	No	June 16, 2014 September 14, 2015-Odor
Arsenic and Inorganic Arsenic Compounds Appendices Fact Sheet External Scientific Peer Review	7440-38-2 (Arsenic)	Yes	July 31, 2012

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments	Date Finalized Revision Date(s) if applicable
Benzene Fact Sheet	71-43-2	Yes	October 15, 2007 Revised, September 14, 2015
Butadiene, 1,3- Fact Sheet	106-99-0	Yes	August 7, 2008 24-Hour Reference Value: September 14, 2015
Butane, All Isomers n-Butane Isobutane Fact Sheet	106-97-8 75-28-5	Yes	July 31, 2012 Revised September 14, 2015
Butene, 1- Fact Sheet	106-98-9	Yes	April 15, 2008 Revised: March 14, 2014 Revised Odor Value, September 14, 2015
Butene, 2- cis and trans cis-butene, -2 trans-butene, -2 Fact Sheet	107-01-7 590-18-1 624-64-6	Yes	April 15, 2008 Revised: March 14, 2014 Revised Odor Value: September 14, 2015
Butoxyethanol Fact Sheet	111-76-2	Yes	, October 15, 2007 Revised Odor Value: September 14, 2015
Butyl acetate, n Fact Sheet	123-86-4	Yes	December 29, 2010 Revised: March 14, 2014 Revised Odor Value: September 14, 2015
Butyraldehyde Fact Sheet	123-72-8	Yes	March 14, 2014 Revised Odor Value: September 14, 2015

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Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Cadmium and Cadmium Compounds Cadmium Cadmium Carbonate Cadmium Chloride Cadmium Oxide Cadmium Sulfate Cadmium Sulfide Fact Sheet	7440-43-9 513-78-0 10108-64-2 1306-19-0 10124-36-4 1306-23-6	No
Carbon Disulfide Fact Sheet	75-15-0	No
Chlorine Fact Sheet	7782-50-5	Yes
Chromic Acid Mist Fact Sheet	7738-94-5	No
Chromium (All Compounds Except Hexavalent Chromium) Elemental Chromium Trivalent Chromium Fact Sheet	7440-47-3 16065-83-1	No
Chromium (Hexavalent) Ammonium dichromate Calcium chromate Sodium chromate Chromium trioxide Sodium dichromate Sodium dichromate, dihydrate Lead chromate Potassium chromate Potassium dichromate Strontium chromate Zinc chromate Fact Sheet External Scientific Peer Review	18540-29-9 7789-09-5 13765-19-0 7775-11-3 1333-82-0 10588-01-9 7789-12-0 7758-97-6 7789-00-6 7778-50-9 7789-06-2 13530-65-9	Yes
Chromium (Hexavalent) Oral Reference Dose Fact Sheet	18540-29-9	Yes
Cobalt and Cobalt Compounds Fact Sheet	7440-48-4 (Cobalt)	No
Crotonaldehyde trans-crotonaldehyde cis-crotonaldehyde Fact Sheet	4170-30-3 123-73-9 15798-64-8	No

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Decane, All Isomers n-Decane Other 74 Isomers Fact Sheet	124-18-5	No
Dibutylamine Fact Sheet	111-92-2	No
Dichlorobenzene, 1,4- Fact Sheet	106-46-7	No
Dichloroethylene, 1,1- Fact Sheet	75-35-4	No
Diethanolamine and Triethanolamine Diethanolamine Triethanolamine Fact Sheet	111-42-2 102-71-6	No
Diethylamine Fact Sheet	109-89-7	No
Diisopropylamine Fact Sheet	108-18-9	No

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Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Ethylbenzene Fact Sheet	100-41-4	No
Ethylene Fact Sheet	74-85-1	Yes
Ethylene Dibromide Fact Sheet	106-93-4	No
Ethylene Dichloride Fact Sheet	107-06-2	Yes
Ethylene Glycol Fact Sheet	107-21-1	Yes
Ethylene Oxide External Letter Peer Review Response to Public Comments Response to Letter Peer Review Comments Fact Sheet	75-21-8	Yes

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Formaldehyde Fact Sheet	50-00-0	Yes Yes (24-hour)

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Heptane, All Isomers n-heptane 2,2-dimethylpentane 2,3-dimethylpentane 2,4-dimethylpentane 3,3-dimethylpentane 2-methylhexane 3-methylhexane 3-ethylpentane 2,2,3-trimethylbutane Fact Sheet	142-82-5 590-35-2 565-59-3 108-08-7 562-49-2 591-76-4 589-34-4 617-78-7 464-06-2	No
Hexamethylenediamine Fact Sheet	124-09-4	No
Hexane, All Isomers n-Hexane Other 4 Isomers Fact Sheet	110-54-3	No
Hydrogen Chloride Fact Sheet	7647-01-0	Yes
Hydrogen Fluoride and Other Soluble Inorganic Fluorides Fact Sheet	7664-39-3	Yes

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Isobutene Fact Sheet	115-11-7	Yes
Isoprene External Letter Peer Review Response to Comments Letter Peer Review Fact Sheet	78-79-5	No

Substance Name

Chemical Abstract Service Registry Number (CASRN)

Public Comments

Isobutene

Fact Sheet

115-11-7

Yes

Isoprene

Fact Sheet

78-79-5

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Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Manganese and Inorganic Manganese Compounds Fact Sheet	7439-96-5	Yes
Methacrolein Fact Sheet	78-85-3	No
Methanol Fact Sheet	67-56-1	Yes
Methoxysilanes (Tri- and Tetra-) Trimethoxysilane Methyltrimethoxysilane Vinyltrimethoxysilane 3-Chloropropyltrimethoxysilane Tetramethoxysilane Fact Sheet	2487-90-3 1185-55-3 2768-02-7 2530-87-2 681-84-5	Yes
Methyl Amyl Ketone Fact Sheet	110-43-0	No
Methyl Ethyl Ketone Fact Sheet	78-93-3	No
Methylene Chloride Fact Sheet	75-09-2	No
Methylene Diphenyl Diisocyanate and Hexamethylene Diisocyanate 4,4-Methylene Diphenyl Diisocyanate (MDI), All Isomers 1,6-Hexamethylene Diisocyanate (HDI), All Isomers Fact Sheet	101-68-8 822-06-0	Yes
Monoethanolamine Fact Sheet	141-43-5	No

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Nickel and Inorganic Nickel Compounds Nickel Nickel Sulfate Nickel Subsulfide Nickel Oxide Nickel Chloride Fact Sheet External Scientific Peer Review Exit the TCEQ	7440-02-0 7786-81-4 12035-72-2 1313-99-1 7718-54-9	Yes
Nonane, All Isomers n-Nonane Other 34 Isomers Fact Sheet	111-84-2	No

Substance Name

Chemical Abstract Service Registry Number (CASRN)

Public Comments

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

Nonane, All Isomers

n-Nonane Other 34 Isomers

Fact Sheet

111-84-2

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Octane, All Isomers Octane 2,2,4-Trimethylpentane (Isooctane) Other 16 Isomers Fact Sheet	111-65-9 540-84-1	No

Substance Name

Chemical Abstract Service Registry Number (CASRN)

Public Comments

Octane, All Isomers

Octane
2,2,4-Trimethylpentane (Isooctane)
Other 16 Isomers

Fact Sheet

111-65-9
540-84-1

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Pentane, All Isomers n-Pentane Isopentane Neopentane Fact Sheet	109-66-0 78-78-4 463-82-1	Yes
Pentene, All Isomers 1-pentene c-2-pentene t-2-pentene Fact Sheet	109-67-1 627-20-3 646-04-8	No
Phenol Fact Sheet	108-95-2	No
Propionaldehyde Fact Sheet	123-38-6	Yes

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Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
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
Silica, Crystalline Forms Silica, Crystalline Forms (24-hour) cristobalite quartz tridymite tripoli Fact Sheet	14464-46-1 14808-60-7 15468-32-3 1317-95-9	Yes Yes (24-hour)
Styrene Fact Sheet	100-42-5	Yes

Substance Name

Chemical Abstract Service Registry Number (CASRN)

Public Comments

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

Silica, Crystalline Forms

Silica, Crystalline Forms (24-hour)

cristobalite
quartz
tridymite
tripoli

Fact Sheet

14464-46-1
14808-60-7
15468-32-3
1317-95-9

Yes

Yes (24-hour)

Styrene

Fact Sheet

100-42-5

Yes

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
NEW Tert-Butyl Alcohol NEW Fact Sheet	75-65-0	NEW Yes
Tetrachloroethylene(PCE) Fact Sheet	127-18-4	Yes
Texanol Fact Sheet	25265-77-4	Yes
Toluene Fact Sheet	108-88-3	Yes
Trichloroethane, 1,1,1- Fact Sheet	71-55-6	No
Trimethylbenzenes (TMB) 1,2,3-TMB 1,2,4-TMB 1,3,5-TMB Mixed Isomers Fact Sheet	526-73-6 95-63-6 108-67-8 25551-13-7	No

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Vinyl Acetate Fact Sheet	108-05-4	Yes
Vinyl Chloride Fact Sheet	75-01-4	No
Vinylcyclohexene, 4- Fact Sheet	100-40-3	Yes

Substance Name	Chemical Abstract Service Registry Number (CASRN)	Public Comments
Xylenes mixture m-Xylene o-Xylene p-Xylene Fact Sheet	1330-20-7 108-38-3 95-47-6 106-42-3	Yes

Substance Name

Chemical Abstract Service Registry Number (CASRN)

Public Comments

Xylenes

mixture
m-Xylene
o-Xylene
p-Xylene

Fact Sheet

1330-20-7
108-38-3
95-47-6
106-42-3

Yes

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