John
Heinze
<
jheinze@
johnadams.
com>

05/
19/
03
10:
13
AM
To:
Leslie
Scott/
DC/
USEPA/
US@
EPA
cc:
Subject:
CAS
numbers
Leslie
­­
68648­
86­
2
is
one
of
the
CAS
numbers
included
in
the
linear
alkylbenzene
SIDS
documents.
This
number
appears
on
the
1995
OECD
HPV
list,
which
is
apparently
the
reason
we
included
it
in
our
SIDS
documents.

However,
as
you
point
out
the
correct
name
for
this
material
is
Benzene,
C4­
16­
alkyl
derivs.
As
far
as
we
were
able
to
determine,
this
name
and
number
is
not
actually
used
by
any
of
the
US
manufacturers
and
in
fact
is
a
number
used
by
a
Japanese
company
for
branched
alkylbenzene.
Consequently,
we
recommend
that
this
number
be
dropped
from
the
LAB
SIDS
documents
if
this
is
still
possible.

While
reviewing
all
the
CAS
numbers
in
the
LAB
SIDS
documents,
we
realized
that
we
did
not
include
the
CAS
name
and
number
for
the
LAB
used
in
the
1997
EU
Risk
Assessment,
67774­
74­
7,
Benzene
C10­
13
alkyl
derivs.
Would
it
be
possible
to
add
this
CAS
number
to
the
OECD
SIDS
document,
in
effect
replacing
an
incorrect
number
(
68648­
86­
2)
with
a
correct
number
(
67774­
74­
2)?

I
apologize
for
the
confusion
with
the
CAS
numbers
and
thank
you
for
any
assistance
you
can
provide
is
setting
the
record
straight.

­­
John
Heinze
Technical
Director
Council
for
LAB/
LAS
Environmental
Research
529
14th
Street,
NW,
Suite
655
Washington,
DC
20045
Phone:
202­
737­
0171
Fax:
202­
737­
8406
E­
mail:
jheinze@
johnadams.
com
Internet:
www.
cler.
com
