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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.

magnifying glass Definitions of ESLs, REVs & AMCVs

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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

A

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments

Date Finalized
Revision Date(s) if applicable

Acetone
67-64-1 Yes

December 18, 2013
September 1, 2015-Odor

Acrolein
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
107-13-1 Yes

December 18, 2013
September 14, 2015-Odor

Ammonia
7664-41-7 No

June 16, 2014
September 14, 2015-Odor

Arsenic and Inorganic Arsenic Compounds
7440-38-2
(Arsenic)
Yes

July 31, 2012

B

Substance Name Chemical Abstract Service Registry Number
(CASRN)
Public Comments Date Finalized
Revision Date(s) if applicable
Benzene
71-43-2 YesOctober 15, 2007
Revised, September 14, 2015
Butadiene, 1,3-
106-99-0 YesAugust 7, 2008
24-Hour Reference Value: September 14, 2015
Butane, All Isomers

n-Butane
Isobutane


106-97-8
75-28-5

YesJuly 31, 2012
Revised September 14, 2015
Butene, 1-
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


107-01-7
590-18-1
624-64-6

YesApril 15, 2008
Revised: March 14, 2014
Revised Odor Value: September 14, 2015
Butoxyethanol
111-76-2 Yes, October 15, 2007
Revised Odor Value: September 14, 2015
Butyl acetate, n 123-86-4 YesDecember 29, 2010
Revised: March 14, 2014
Revised Odor Value: September 14, 2015
Butyraldehyde
123-72-8 YesMarch 14, 2014
Revised Odor Value: September 14, 2015

C

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments Date Finalized Revision Date(s) if applicable
Cadmium and Cadmium Compounds

Cadmium
Cadmium Carbonate
Cadmium Chloride
Cadmium Oxide
Cadmium Sulfate
Cadmium Sulfide


7440-43-9
513-78-0
10108-64-2
1306-19-0
10124-36-4
1306-23-6

No September 2, 2016
Carbon Disulfide
75-15-0 No September 4, 2015 Revised March 7, 2017
Chlorine
7782-50-5 Yes November 29, 2017
Chromic Acid Mist
7738-94-5 No October 27, 2014
Chromium

(All Compounds Except Hexavalent Chromium)
Elemental Chromium
Trivalent Chromium


7440-47-3
16065-83-1

No October 8, 2009 Accessible 2013
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

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 August 4, 2014
Chromium (Hexavalent) Oral Reference Dose
18540-29-9 Yes September 23, 2016
Cobalt and Cobalt Compounds
7440-48-4
(Cobalt)
No August 16, 2017
Crotonaldehyde

trans-crotonaldehyde
cis-crotonaldehyde

4170-30-3
123-73-9
15798-64-8

No August 4, 2014 Revised September 4, 2015 Revised August 23, 2016

D

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments   Date Finalized Revision Date(s) if applicable
Decane, All Isomers

n-Decane

Other 74 Isomers


124-18-5
No   August 16, 2017
Dibutylamine
111-92-2 No   July 8, 2016
Dichlorobenzene, 1,4-
106-46-7 No   February 13, 2009 Revised: March 14, 2014 Revised Odor Value: September 14, 2015
Dichloroethylene, 1,1-
75-35-4 No   October 15, 2007 Accessible 2013
Diethanolamine and Triethanolamine

Diethanolamine
Triethanolamine


111-42-2
102-71-6
No   June 28, 2018
Diethylamine
109-89-7 No   December 4, 2015
Diisopropylamine
108-18-9 No   July 8, 2016

F

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

Yes (24-hour)

H

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


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
124-09-4 No
Hexane, All Isomers

n-Hexane
Other 4 Isomers


110-54-3
No
Hydrogen Chloride
7647-01-0 Yes
Hydrogen Fluoride and Other Soluble Inorganic Fluorides
7664-39-3 Yes

I

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Isobutene
115-11-7 Yes
Isoprene

78-79-5 No

M

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Manganese and Inorganic Manganese Compounds
7439-96-5 Yes
Methacrolein
78-85-3 No
Methanol
67-56-1 Yes
Methoxysilanes (Tri- and Tetra-)

Trimethoxysilane
Methyltrimethoxysilane
Vinyltrimethoxysilane
3-Chloropropyltrimethoxysilane
Tetramethoxysilane


2487-90-3
1185-55-3
2768-02-7
2530-87-2
681-84-5

Yes
Methyl Amyl Ketone
110-43-0 No
Methyl Ethyl Ketone
78-93-3 No
Methylene Chloride
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



101-68-8
822-06-0
Yes
Monoethanolamine
141-43-5 No

N

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



111-84-2
No

O

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Octane, All Isomers

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



111-65-9
540-84-1
No

P

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Pentane, All Isomers

n-Pentane
Isopentane
Neopentane


109-66-0
78-78-4
463-82-1

Yes
Pentene, All Isomers

1-pentene
c-2-pentene
t-2-pentene


109-67-1
627-20-3
646-04-8

No
Phenol
108-95-2 No
Propionaldehyde
123-38-6 Yes

S

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

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


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

Yes

Yes (24-hour)

Styrene
100-42-5 Yes

T

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Tert-Butyl Alcohol
75-65-0 Yes
Tetrachloroethylene(PCE)
127-18-4 Yes
Texanol
25265-77-4 Yes
Toluene
108-88-3 Yes
Trichloroethane, 1,1,1-
71-55-6 No
Trimethylbenzenes (TMB)

1,2,3-TMB
1,2,4-TMB
1,3,5-TMB
Mixed Isomers


526-73-6
95-63-6
108-67-8
25551-13-7

No

V

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

X

Substance Name Chemical Abstract Service Registry Number (CASRN) Public Comments
Xylenes

mixture
m-Xylene
o-Xylene
p-Xylene


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

Yes