ARS PESTICIDE PROPERTIES last update May 1995


name:  METHYL ISOTHIOCYANATE                     CASRN: 556-61-6

molecular formula: C2H3N5
molecular weight : 73.11
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB2

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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):
       -    119

Melting point(deg C):
35     -      6                                  H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):

Photolysis (per day):

Vapor pressure (mPa):
2.7E06*                          20              H     9ACHB2


Water solubility (ppm):        -temp-       -source-  -reference-
7600*                            20              H     9ACHB2
                                                 H     9ACHB2 7TH ED.,1977

Organic solubility (ppm):

Henrys law (Pa m3/mol):
26*                              20              M     6NORAM

Octanol/water partitioning (log Kow):

Acid dissociation (pKa):



Soil sorption:
soiltype        temp.   Kd       Koc      %om   pH    reference
                                 10                   8EETNS
                                 6                    8SWAMD
                                                      8INSFO
                                 8*

Field Dissipation halflife(days):
value           test area        pH          source   reference
0-6C:14                                         H     9ACHB2 1983 ED.
6-12C:10                                        H     9ACHB2 1983 ED.
18-20C:7                                        H     9ACHB2 1983 ED.
7*

Halflife in soil:
Soiltype            aerobic      anaerobic   source   reference
                     10                         M     6NORAM
                     30                         M     6NORAM

Comments:
AEROBIC 10 = 20 DEGREES C; 30 = 5 DEGREES C.