Thiodicarb Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R25:Giftig beim Verschlucken.
R26:Sehr giftig beim Einatmen.
S-Sätze Betriebsanweisung:
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Beschreibung
Thiodicarb, 3,7,9,13-tetramethyl-5,11-
dioxa-2,8,14-trithia-4,7,9,12-tetra-azapentadeca-3,12-di
ene-6,10-dione (IUPAC), consists of colorless crystals, which
are sparingly soluble in water, readily soluble in
dichloromethane, acetone, methanol, and xylene.
Thiodicarb is produced by reaction of N,N -thiobis(methylcarbamic
acid fluoride) with 2-methylthioacetaldoxim in the presence of a base.
Verwenden
Thiodicarb is used as an insecticide.
Allgemeine Beschreibung
Colorless to pale tan crystals. Non corrosive. Used as an insecticide.
Air & Water Reaktionen
Hydrolyzed by strong acid or base.
Reaktivität anzeigen
A carbamate derivative. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
Landwirtschaftliche Anwendung
Insecticide, Molluscicide, Ovicide: Not approved for use in EU countries. Registered
for use in the U.S. Thiodicarb is used primarily on cotton,
sweet corn, and soybeans. The remaining usage is spread
among leafy vegetables, cole crops, ornamentals, and
other minor use sites. Thiodicarb acts as an ovicide against
cotton bollworms and budworms.
Handelsname
CGA® 45156; CHIPCO[C];
DICARBOSULF®; DICARBASULF®; LARVIN®;
LEPICRON®; SEMEVIN®; NIVRAL®; UC-51762®;
UC 51769®; UC 80502®
Environmental Fate
Soil. Under aerobic and anaerobic soil conditions, thiodicarb degrades to methomyl
and methomyl oxime (Hartley and Kidd, 1987). The reported half-life in various soils is
3–8 days (Hartley and Kidd, 1987).
Stoffwechselwegen
The initial metabolic reaction of thiodicarb in soils, plants and animals
is the hydrolytic or thiolytic cleavage of the N-S bond to methomyl.
The subsequent metabolic pathway of methomyl involves hydrolysis /
elimination reactions to yield S-methyl-N-hydroxythioacetimidate and
ultimately acetonitrile and CO
2 as the major terminal products. The metabolic
pathways of thiodicarb are presented in Scheme l. See also the
methomyl entry.
Thiodicarb Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
