Methomyl Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
WEISSE KRISTALLE MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen und Verbrennen unter Bildung giftiger und ?tzender Rauche mit Stickstoffoxiden, Schwefeloxiden, Cyanwasserstoff und Methylisocyanat. Reagiert mit starken Basen.
ARBEITSPLATZGRENZWERTE
TLV: 2.5 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); BEI vorhanden; (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation des Aerosols und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C tritt eine gesundheitssch?dliche Kontamination der Luft nicht oder nur sehr langsam ein , viel schneller jedoch beim Versprühen oder Dispergieren.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt die Augen. M?glich sind Auswirkungen auf das Nervensystem mit nachfolgenden Kr?mpfen und Atemdepression. Cholinesterasehemmer. Exposition weit oberhalb der Arbeitsplatzgrenzwerte kann zum Tod führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
M?glich sind Auswirkungen auf das Blut mit nachfolgender Blutarmut.
LECKAGE
Pers?nliche Schutzausrüstung: Atemschutzger?t, P3-Filter für giftige Partikel. NICHT in die Umwelt gelangen lassen. Verschüttetes Material in abdichtbaren Beh?ltern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgf?ltig sammeln. An sicheren Ort bringen.
R-S?tze Betriebsanweisung:
R28:Sehr giftig beim Verschlucken.
R50/53:Sehr giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
R36:Reizt die Augen.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R11:Leichtentzündlich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S1/2:Unter Verschluss und für Kinder unzug?nglich aufbewahren.
S22:Staub nicht einatmen.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S60:Dieses Produkt und sein Beh?lter sind als gef?hrlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S16:Von Zündquellen fernhalten - Nicht rauchen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Beschreibung
Acetamide acid (methomyl) is a carbamate broad-spectrum insecticide. Methomyl is
classified as a restricted use pesticide (RUP). It is a crystalline solid with a slight sulphurous
odour and very soluble in methanol, acetone, ethanol, and isopropanol. It decomposes
with heat and releases hazardous gases/vapours, such as sulphur oxides, methyl
isocyanate, and HCN. Acetamide acid (methomyl) is used both as a contact insecticide and
as a systemic insecticide. It is used as an acaricide to control ticks and spiders; as fly bait;
for foliar treatment of vegetable, fruit, field crops, cotton, and commercial ornamentals;
and in and around poultry houses and dairies.
Chemische Eigenschaften
Methomyl is a white crystalline solid with
a slight sulfurous odor. A noncombustible solid, that may
be dissolved in flammable liquids that may alter physical
properties listed here.
Verwenden
Methomyl is a pesticide. This mixture of two stereoisomers
is used as a foliar spary to control field crops,
stables and poultry houses, and in glasshouses on
ornamentals and vegetables, or in flypapers. Cases
have been reported in chrysanthemum growers and in
two women working in a plant nursery.
Definition
ChEBI: A carbamate ester obtained by the formal condensation of methylcarbamic acid with the hydroxy group of 1-(methylsulfanyl)acetaldoxime.
Allgemeine Beschreibung
White crystalline solid with slight sulfurous smell. Used as a nematocide, and an insecticide on vegetables, tobacco, cotton, alfalfa, soy beans, and corn.
Air & Water Reaktionen
Water soluble.
Reaktivit?t anzeigen
Methomyl is a carbamate ester. 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.
Hazard
Toxic by ingestion. Acetyl cholinesterase
inhibitor, male reproductive damage, and hematologic effects. Questionable carcinogen.
Health Hazard
Methomyl has high oral toxicity, moderate inhalation toxicity and low skin toxicity. The probable oral lethal dose for humans is between 7 drops and 1 teaspoon for a 150 pound adult. Death is due to respiratory arrest.
Brandgefahr
When heated to decomposition, Methomyl emits very toxic fumes of nitrogen oxides and sulfur oxides. Do not subject liquid formulations to temperatures below 32F.
Landwirtschaftliche Anwendung
Insecticide, Acaricide: Methomyl is a broad-spectrum insecticide that is
particularly effective against organophosphorus-resistant
pests. It is used as an acaricide to control ticks and spiders. It is used for foliar treatment of vegetable, fruit and
field crops, tobacco, cotton, commercial ornamentals, and
in and around poultry houses and dairies. It is also used as
a fly bait. Methomyl is effective as a “contact insecticide,”
because it kills target insects upon direct contact, and also
as a “systemic insecticide” because of its capability to
cause overall “systemic” poisoning in target insects, after
it is absorbed and transported throughout the pests that
feed on treated plants. It is capable of being absorbed by
plants without being “phytotoxic” or harmful, to the plant.
A U.S. EPA restricted Use Pesticide (RUP).
Handelsname
ACINATE®; AGRINATE®; CIMETLE®;
DuPont
TM 1179®; FRAM FLY KILL®; FLYTEK®;
IMPROVED BLUE MALRIN SUGAR BAIT®;
IMPROVED GOLDEN MALRIN BAIT®; INSECTICIDE
1179®; KIPSIN®; KUIK®; LANNATE®; LANNOX®;
LANOX 90®; LANOX 216®; METHOMEX®;
METHOMYL® 20SC; MEMILENE®; METHAVIN®;
NU-BAIT II®; NUDRIN®; PILLARMATE®;
RENTOKILL®; RENTOKIL FRAM FLY BAIT®;
RIDECT®; SD 14999®; SOREX GOLDEN FLY BAIT®;
WL 18236®
Kontakt-Allergie
Methomyl is a pesticide agent, a carbamate insecticide with anticholinesterase activity. This mixture of two stereoisomers is used as a foliar spray to control field crops, in stables and poultry houses, and in glasshouses on ornamentals and vegetables, or in flypapers. Cases were reported in chrysanthemum growers and in two women working in a plant nursery
Sicherheitsprofil
Poison by ingestion,
inhalation, and subcutaneous routes. Mildly
toxic by skin contact. Wen heated to
decomposition it emits very toxic fumes of
NOx and SOx.
m?gliche Exposition
Methomyl is a broad-spectrum insecticide used as insecticide in many vegetables, field crops;
certain fruit crops; and ornamentals.
Incompatibilities: Keep away from strong bases, strong oxidizers. Heat causes decomposition forming toxic and irritating fumes including nitrogen oxides; sulfur oxides;
hydrogen cyanide; methylisocyanate
Environmental Fate
Biological. From the first-order biotic and abiotic rate constants of methomyl in
estuarine water and sediment/water systems, the estimated biodegradation half-lives were
75–165 and 39–134 days, respectively (Walker et al., 1988).
Soil. Harvey and Pease (1973) reported that methomyl dissipated rapidly in fine sand
and loamy sand soils. One month following application to a Delaware soil, 1.8% of the
applied dosage was recovered and after 1 year, methomyl was not detected. T
Groundwater. According to the U.S. EPA (1986) methomyl has a high potential to
leach to groundwater.
Plant. The reported half-lives of methomyl on cotton plants, mint plants and Bermuda
grass were 0.4–8.5, 0.8–1.2 and 2.5 days, respectively (Willis and McDowell, 1987).
Chemical/Physical. Emits toxic fumes of nitrogen and sulfur oxides when heated to
decomposition (Sax and Lewis, 1987; Lewis, 1990).
Lager
Acetamidic acid (methomyl) should be kept stored in a sealed container in a cool
(below 0
°
C), dry, area with adequate ventilation. The chemical should be kept away
from incompatible chemical substances, strong oxidizing agents, strong bases, other
pesticides, and food or feed.
Versand/Shipping
UN2757 Carbamate pesticides, solid, toxic,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1;
Labels: 6.1-Poisonous materials, Technical Name Required
Waste disposal
Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations
governing storage, transportation, treatment, and waste
disposal. Alkaline hydrolysis leads to complete degradation to nontoxic products. May be dissolved in water
and sprayed into a furnace with effluent gas scrubbing
also. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package
label directions or by contacting your local or federal
environmental control agency, or by contacting your
regional EPA office.
Vorsichtsma?nahmen
Occupational workers should avoid contact of acetamidic acid (methomyl) with the skin,
eyes, or clothing, and avoid exposures to vapor or mist. Workers should be careful when
storing and/or disposing of acetamidic acid, avoid the dust contaminating water, food,
or feed by storage or disposal. Workers should use respiratory protection: Government approved respirator. Hand Protection: Compatible chemical-resistant gloves. Eye
Protection: Chemical safety goggles.chemical safety goggles.
Methomyl Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
