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.W. R. Richard - Research Center
Hay 13, 1969
AROCLOR - ANALYSIS IN PESTICIDE
RESIDUES'----------;------------- ---------------
(Visit to Prof. 0. Widmark
U. of Stockholm - May 5, 1969)
File
.
. R. Keller
A-Lab
TS. Wheeler
EWHEE
E. Tucker
Res.
H. Bergerr
KBEna
D. Olson W. Kuhn
DOLSO WKUHN
R. Kountz
RKOUN
R. Davis
RDAVI
P. Benignus/J. BryantpBENI
J. Fallon
JFALL
Q. Thompson
CffHOM
R. Weiss
RWEIS
L. Stark
LSTAR
J,, Springate
JSPRI
^M'. Farrar
Res. 1
W. Waychoff
WWAYC
C. Paton
. CPATO
R. Baxter -
RUABON
Widmark was finding
.
' . Cls and Cle chlorinated biphenyls from extraction of.salmon and ... . from extraction of waste sewage sludge, . .
/*. ^ ' '
ToW ^V and Cla chlorinated biphenyl
-Bone Clio `_ .... /V . ;
.
vNo Cl** and Cl**- "
': " .
*' ...
.. .
.
. ,
^. ^This corresponds *roughly to^lophen 50 or Aroclor 1254. . .
~`
.V
. . ?.* '
-
: .'
.'. .-'Che, isomers found In nature *are .not .the same ratios as in either rAroclor
fv 1254 or Clophen 50.. . .v.v . V ..... ... ,
; . ' .
.
>. Widmark lias examined 2000 samples from the.Baltic^eg. Another group of
..^ecologists is examining the sea Around Scotland.' Their/results are a,. . '
bit different according to Widmarks -knowledge;
_
. . ... _ *
'
* '
. -
Widmark had been in oontact'irith transformer manufacturers < in Sweden. *
>" They reported very low loss'of dhlorlnated biphenyls, an occasional5pill.
Widmark kept hitting at marine paints as a source of.the product.
'
He wanted Monsanto to restrict sale to those closed system applications.
He asked if the economic value of PCS*s was worth the bad publicity which
would come to Monsanto.
.
We countered with a question. What products would he recommend as sub
stitutes? What kinds of synthetic compounds are biologically acceptable?
Would he help establish a safe tolerance level of synthetic compounds in
wild-life?
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He reported that he had not isolated or found much chlorinated biphenyl with 1 through 4 Cl atoms. This might be because Aroclor 1242 and below . is more biodegradable; (or it could be due to the analytical isolation and separation methods; or perhaps Aroclor 1242 is less exposed in the world.) .
Widmark is dedicated to better and more accurate analysis. He is in sympathy with most of the ecologists demanding elimination of chlorinated pesticides. His knowledge of scientific evidence and.its requirements makes him slightly hesitant in condeimlng Aroclor itself or demanding its total eclipse.
Keller and Wheeler should have a more complete report.
Widmark reported not finding chlorinated naphthalene, chlorinated paraffin, chlorinated benzene, chlorinated terphenyl. He thought he had identified and accounted for 80# or more of the lipid soluble extractable chlorine
containing compounds.
Based, on these remarks of Widmark we might consider alternate products
and actions.
"
What Is the Cls and Cl content of Aroclor 1242?
._
The Aroclor 1242 has 31^ dichloro,
trichloro
' ' i
; \6% ttetrachloro
. .
The Cls content must be very ..low in our present material. If
Aroclor 1242 is Indeed biodegradable we might restrict usage
" to minimize and -control Its ^concentration in nature to acceptable
levels. .; \':.S -
'
However, the use of Aroclor 1248, 1254 and 1260 would seem to -require further restrictions in exposed systems.
. : Bcott Tucker reported that Aroclor 1242 could be destroyed by
HNOa/HaSO* treatment. Widmark may or may not have "been destroying
. Aroclor 1242 before his analysis. :
'
We could also expect that Clstf might go undetected based on. ' .
Widmark's-evidence; and apparently chlorinated paraffin and
chlorinated terphenyl have-so far escaped detection or are ab
. sent in the tissues of birds or fish.
v
Again, Keller and Wheeler should have a more complete report.
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W. R. Richard
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NfcV 029o7a 742929
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STLCOPCB4024079
w. B. Pnoagocrgo - Canard of fleas - E2KK
Sspterber 13, 1971 W. R. Richard - T3A
p. D. Ecnignua - F2SE n. 5. Lorgan - B?5.\ T. L. Gossage - B2SL n. C. Keller - 1760 R. H. Kunch - 1760 c. Paton - C3SP
Dr, Lyon Kandolcorn, Wostinghouao Research, Pittsburgh, Pennsylvania called to inguira about a forod report describing tho relative data on tho biodegradability of Aroclor 1C16 and Aroclor 1242,
Ea indicated he had seen such a report end that someone in f.'onncnto hod offered to send him a copy.
Io thoro a report wa can freely share with customers or can tho data cvciltblo bo presented in a rcsnnor that permits us to do so?
WBP/er
tf. B. Papageorge
NEV 025139
738394
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STLCOPCB4024080