ARS PESTICIDE PROPERTIES last update May 1995


name:THIRAM                                    CASRN: 137-26-8

molecular formula: C6H12N2S4
molecular weight : 240.44
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB2

_________________________________________________________________________
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):
155    -    156                                  H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
2.41*                            25     9        M     6UNIRO
0.199*                           25     7        M     6UNIRO
0.0101*                          25     5        M     6UNIRO

Photolysis (per day):
0.0346*              SOIL        25              M     6UNIRO
3.8*                 WATER       25              M     6UNIRO

Vapor pressure (mPa):
NEGLI.                                           H     9PMED8


Water solubility (ppm):     -temp-          -source-  -reference-
30                            RT                 H     EESADV
16.5*                         25                 M     6UNIRO

Organic solubility (ppm):
8.0E04*   ACETONE                                H     9PMED8
2.00E+05* CHLOROFORM                             H     9PMED8
<1E04*    ETHANOL                                H     9PMED8

Henrys law (Pa m3/mol):

Octanol/water partitioning (log Kow):
1.593                                            M     6UNIRO
1.73                                             H     9PME10

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH      reference
                                670*                   8PHYTO 64:1091-1099,1974
                                                       EESADV

Field Dissipation halflife(days):
value             test area        pH        source    reference
15                                              M      9RHPOU
70                MD (TURF)                     M      6UNIRO
45(17-70)*

Halflife in soil:
Soiltype             aerobic     anaerobic   source    reference
SANDY LOAM*          15.2                       M      6UNIRO


Comments: