ARS PESTICIDE PROPERTIES last update May 1995


name:THIODICARB                                CASRN: 59669-26-0

molecular formula: C10H18N4O4S3
molecular weight : 354.47
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9RHPOU

_________________________________________________________________________
Key to sources: (M)Manufacturer, (R)eview, (H)andbook, (E)xperiment,
                (C)alculated, (U)nknown, (P)EPA data, (W)auchope

* denotes a selected value where multiple values of a property are listed.
_________________________________________________________________________

-value-            -medium-   -temp-  -pH-   -source-    -reference-


Boiling point(deg C):
       -

Melting point(deg C):
168    -    172                                  H     9ACHB2,2ND ED.,1987

Decomposition point(deg C):
       -

Heat of vaporization(deg C):


--RATE CONSTANTS--

Hydrolysis (per day):
0.08040*                         25     5        M     9RHPOU

Photolysis (per day):
0.0086*              WATER       0               M     9RHPOU
0.037*               WATER       25              M     9RHPOU

Vapor pressure (mPa):
4.3*                             20              H     9ACHB2,2ND ED.,1987
5.1                              20              H     9PMED8,8TH ED.,p.798,1987


Water solubility (ppm):        -temp-        -source-  -reference-
19.1*                            25              M     9RHPOU
35                               25              H     9ACHB2,2ND ED.,1987

Organic solubility (ppm):
3.2E+3*   METHANOL               25              M     9RHPOU
46.3E-1*  HEXANE                 25              M     9RHPOU
2.1E+5*   DICHLOROMEHANE         25              M     9RHPOU
5.0E+3*   METHANOL               25              H     9ACHB2,2ND ED.,1987
3.0E+3*   XYLENE                 25              H     9ACHB2,2ND ED.,1987

Henrys law (Pa m3/mol):
0.079                            25              M     9RHPOU

Octanol/water partitioning (log Kow):
1.2-1.6                          25              M     9RHPOU
1.4*                             25

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd       Koc     %om   pH     reference
SAND                    00.58    125     0.8   5.8    9RHPOU
                                 350                  9RHPOU
SILT LOAM                4.47    373     2.08         9RHPOU
CLAY                     14.0    1167    2.08         9RHPOU
SANDY LOAM               1.34    335     0.69         9RHPOU
SAND                     0.16    64      0.43         9RHPOU
LOAM                    01.34    177     1.3   8.1    9RHPOU
SANDY LOAM              01.22    214     1.0   7.8    9RHPOU
                                 351*

Field Dissipation halflife(days):
value           test area        pH          source   reference
3-8             BARE (2-84)                     M     9RHPOU
3-8             SOIL (2-84)                     M     9RHPOU
3-8             SOIL (2-84)                     M     9RHPOU
7                                               R     8EETNS
2               87 NC COTTON                    M     9RHPOU
5(2-8)*

Halflife in soil:
Soiltype            aerobic      anaerobic   source   reference
SANDY LOAM          <2*            <7           M     9RHPOU


Comments:
SOIL SORPTION KOC VALUE=351(64-1167)