Chemical Engineering October 2016 - 23

TCSA WORK PLAN CHEMICALS
Acetaldehyde
Acrylonitrile
tert-Amyl methyl ether
Pigment Violet 29
Antimony and antimony compounds
Arsenic and Arsenic compounds
Asbestos and asbestos-like fibers
Barium carbonate
Benzenamine
Benzene
Bisphenol-A
1-Bromopropane
1,3-Butadiene
Pigment yellow 83
Pigment yellow 65
4-sec-Butyl-2,6-di-tert-butylphenol
Cadmium and cadmium compounds
Carbon tetrachloride
Chromium and chromium compounds
Cobalt and cobalt compounds
Creosotes
Cyanide compounds (dissociable)
Decabromodiphenyl ethers
Dibutyl phthalate
o- and p-Dichlorobenzene
3,3'-Dichlorobenzidine
3,3'-Dichlorobenzidine dihydrochloride
1,1- 1,2- and trans-1,2-Dichloroethylene
1,2-Dichloropropane
Dicyclohexyl phthalate
Di-ethylhexyl phthalate
Di-isobutyl phthalate
Di-isodecyl phthalate
Di-isononyl phthalate
1,2-Dimethoxyethane
2-Dimethylaminoethanol
di-n-Octyl phthalate
1,4-Dioxane
Ethanone, 1-(1,2,3,4,5,6,7,8-octahydro2,3,5,5-tetramethyl-2-naphthalenyl)
Ethylbenzene
Ethylene
dibromide
bis(2-Ethylhexyl) adipate
2-Ethylhexyl 2,3,4,5-tetrabromobenzoate
bis(2-Ethylhexyl)-3,4,5,6-tetrabromophthalate
Formaldehyde
2,5-Furandione
Hexabromocyclododecane (HBCD)
Hexachlorobutadiene
1-Hexadecanol
1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta
[]-2-benzopyran (HHCB)
2-Hydroxy-4-(octyloxy) benzophenone
Lead and lead compounds
Long-chain chlorinated paraffins (C18-20)
Medium-chain chlorinated paraffins (C14-
C17)
Methylene chloride
4,4'-Methylene bis(2-chloroaniline)
4,4'-(1-Methylethylidene)bis[2,6-dibromophenol]
(TBBPA)
N-Methyl-2-pyrrolidone (NMP)
Molybdenum and Mb compounds
Naphthalene
Pigment red 52
Nickel and Ni compounds
N-Nitroso-diphenylamine
Nonylphenol and nonylphenol ethoxylates
(NP/NPEs)
Octamethylcyclotetra-siloxane (D4)
4- tert -Octylphenol( 4 - ( 1 , 1 , 3 , 3 -
tetramethylbutyl)-phenol)
p,p'-Oxybis(benzenesulfonyl hydrazide)
p,p'-Oxybis(benzenesulfonyl hydrazide)
Phosphoric acid triphenyl ester (TPP)
Phthalic anhydride
Styrene
Tetrachloroethylene
Tribromoethane
1,1,2-Trichloroethane
Trichloroethylene
Triglycidyl isocyanurate
Tris(2-chloroethyl) phosphate
2,4,6-Tris(-tert-butyl)phenol
Vinyl chloride
m-, p-, and o-Xylene
to do with the collection of fees to
help defray the cost of implementing
provisions of the law and fees for
the costs of industry-requested risk
evaluations. EPA acknowledges the
importance of completing a rule on
fees in a timely manner.
Public comment periods for those
three topics closed in late August,
and many groups did submit comments.
The agency is now reviewing
those comments in preparation for
its draft rules in those three areas.
Initial risk assessments
One of the major decisions for the
EPA will involve which chemicals
will be the subject of the first safety
evaluations under the LCSA. As
part of its implementation plan for
LCSA, EPA will publish a list of ten
chemicals on which it will conduct
risk assessments, and formally initiate
those studies. The list of the first
ten chemicals, which EPA plans to
reveal by mid-December, may be influenced
by stakeholder comment,
but will be drawn from a larger list
established before the passage of
LCSA. In 2014, EPA published a
2014 update to its " TSCA Workplan
for Chemical Assessments, " a list of
90 chemicals known to pose health
risks and that the agency intends
to consider for a risk assessment.
The list was generated by considering
factors that include a chemical's
potential for reproductive or developmental
effects, possible neurotoxic
or carcinogenic effects, and
its ability to persist, bioaccumulate
and be toxic.
The TSCA Work Plan list includes
a wide range of chemical types, including
compounds of heavy metals,
such as cadmium, nickel and
arsenic, as well as solvents, such
as benzene, toluene and xylenes
and common monomers, such as
vinyl chloride and styrene (see box).
The work plan list of 90 chemicals
includes four for which EPA has
completed risk assessments under
the previous legislation: antimony
trioxide (a synergist for halogenated
flame retardants), trichloroethylene,
dichloromethane and HHCB
(1,3,4,6,7,8-hexahydro-4,6,6,7,8,8,hexamethylcyclopenta[]-2benzopyran;
a fragrance ingredient).
For those four, previously governed
under Section 6 of the TSCA law,
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
OCTOBER 2016
EPA plans to publish rules on limiting
those chemicals. EPA also has
about eight additional chemicals in
ongoing safety risk assessments.
Outside organizations have also
weighed in on where the agency
should start. For example, in July,
the EWG published what it feels are
the ten highest-priority chemicals for
safety risk assessments. The list includes
asbestos, bisphenol-A (along
with its brominated form), phthalates,
two classes of flame retardants
(chlorinated phosphate flame retardants
and brominated flame retardants),
tetrachloroethylene (perchloroethylene),
bis(2-ethylhexyl) adipate
(DEHA), and p-dichlorobenzene. n
Scott Jenkins
References
1. EPA, TSCA updated workplan 2014. www.epa.gov/
sites/production/files/2015-01/documents/tsca_work_
plan_chemicals_2014_update-final.pdf
2. EPA, Lautenberg Chemical Safety Act First-Year
Implementation Plan, www.epa.gov/assessing-andmanaging-chemicals-under-tsca/frank-r-lautenbergchemical-safety-21st-century-act-2
3.
Walker, B. and Benesh, M., " 10 Chemicals EPA
Should Act on Now, " Environmental Working Group, July
2016, www.ewg.org/research/under-new-safety-law20-toxic-chemicals-epa-should-act-now
23
http://www.epa.gov/ http://www.epa.gov/assessing-and http://www.ewg.org/research/under-new-safety-law http://WWW.CHEMENGONLINE.COM
Chemical Engineering October 2016

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