PRODUCT
CHEMISTRY
CHAPTER
4/
3/
06
A.
Chemical
Overview
The
chemical
Orthophenylphenol
(
OPP)
is
generally
used
as
a
germicide.

B.
Chemical
Identification
$
Name:
Orthophenylphenol
(
OPP)

$
Chemical
Family:
Phenol
$
Common/
Trade
Names:
DOWICIDE
®
1
Antimicrobial,
Preventol
O
Extra
1
$
CAS
Number:
90­
43­
7
$
Molecular
Formula:
C12H10O
C.
Physical/
Chemical
Properties
The
following
characteristics
have
been
reported
for
orthophenylphenol:
Technical
Grade
Active
Ingredient
(
TGAI):

$
Molecular
Weight:
170.2
$
Color:
Colorless
$
Odor:
Weakly
Phenolic
$
Physical
State:
solid
(
flakes)

$
Specific
gravity:
1.2
$
Dissociation
Constant:
9.9
at
25
E
C
$
pH:
6.1
in
aqueous
solution
at
22.7
E
C
$
Stability:
stable
at
normal
conditions
$
Melting
point:
56­
58
E
C
$
Boiling
point:
286
E
C
$
Water
Solubility:
700
mg/
L
at
25
E
C
$
Octanol­
water
Partition
Coefficient:
3.3
$
Vapor
Pressure:
0.002
mm
Hg
at
25oC
$
Oxidation­
Reduction
Characteristics:
Product
contains
no
oxidizing
or
reducing
functions
$
Storage
Stability:
Stable
for
at
least
two
years
under
normal
storage
conditions
$
Corrosion
Characteristics:
Product
is
not
corrosive
to
packaging
materials.

$
Flammability:
Flash
Point
~
138
o
C
$
Dielectric
Breakdown
Voltage:
Not
Established.
A.
Chemical
Overview
The
chemical
Sodium
o­
phenylphenol
is
generally
used
as
an
in­
can
preservative.

B.
Chemical
Identification
$
Name:
Sodium
o­
phenylphenate
$
Chemical
Family:
Phenol
$
Common/
Trade
Names:
DOWICIDE
®
A
Antimicrobial,
Preventol
ON
extra
$
CAS
Number:
132­
27­
4
$
Molecular
Formula:
C12H9NaO
C.
Physical/
Chemical
Properties
The
following
characteristics
have
been
reported
for
Sodium
o­
phenylphenol:
Technical
Grade
Active
Ingredient
(
TGAI):

$
Molecular
Weight:
192.19
$
Color:
White
to
light
buff
$
Physical
State:
solid
(
flake)

$
Specific
gravity:
.61­.
69
$
Dissociation
Constant:
10
@
20
E
C
$
pH:
12­
13.5
$
Stability:
Stable
under
controlled
conditions
$
Melting
point:
298.5
E
C
$
Water
Solubility:
60.6
g/
100
mL,
53.37%
(
w/
w)

$
Octanol­
water
Partition
Coefficient:
.59
$
Vapor
Pressure:
1.8*
10­
9
mm
Hg
@
25
E
C
BIBLIOGRAPHY
MRID#
CITATIONS
101697
1969.
Dow
Chemical
Company
Document,
Submitted
for
Partial
Fulfillment
of
the
Product
Chemistry
of
Orthophenylphenol.
416050­
01C
Pawellek,
D,
and
Jones,
T.
C.,
1990
Product
Chemistry
Data,
Guideline
Series
61,
62
and
63,
Mobay
Corporation
Mobay
Road,
Pittsburg,
PA
Note:
MRID
#
s:
439942­
01,
419149­
01,
416095­
01C,
423819­
01C,
424570­
01,
424417­
03,
424417­
02,
424417­
01
crossreference
all
the
physical/
chemical
characteristics
of
Orthophenolphenol,
Orthphenylphenol,
Sodium
Salt.
