MCPA (ISO) Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
WEISSES KRISTALLINES PULVER.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen unter Bildung giftiger und ätzender Rauche mit Chlorwasserstoff. Schwache Säure.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation des Aerosols, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Verdampfung bei 20 °C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch beim Versprühen oder Dispergieren schnell erreicht werden, vor allem als Pulver.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt die Augen, die Haut und die Atmungsorgane.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Tierversuche zeigen, dass die Substanz möglicherweise fruchtbarkeitsschädigend oder entwicklungsschädigend wirken kann. (S. Anm.).
LECKAGE
Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel. NICHT in die Umwelt gelangen lassen. Verschüttetes Material in abdichtbaren Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen.
R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
R38:Reizt die Haut.
R41:Gefahr ernster Augenschäden.
R36:Reizt die Augen.
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37:Geeignete Schutzhandschuhe tragen.
S39:Schutzbrille/Gesichtsschutz tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
Chemische Eigenschaften
White, crystalline solid.
Free acid insoluble in water but sodium and amine
salts are soluble.
Verwenden
Labelled MCPA (C369470). Herbicide.
Definition
ChEBI: A chlorophenoxyacetic acid that is (4-chlorophenoxy)acetic acid substituted by a methyl group at position 2.
Allgemeine Beschreibung
Colorless plates. Corrosive. Practically insoluble in water. Used as an herbicide.
Air & Water Reaktionen
Insoluble in water.
Landwirtschaftliche Anwendung
Herbicide: A U.S. EPA restricted Use Pesticide (RUP) as MCPA,
sodium salt. MCPA is a systemic post-emergence phenoxy
herbicide used to control broadleaf annual and perennial
weeds (including thistle and dock) in cereals, flax, rice,
vines, peas, potatoes, grasslands, forestry applications,
and on rights-of-way. It is very compatible with many
other compounds and may be used in formulation with
many other products, including bentazone, bromoxynil,
2,4-D, dicamba, fenoxaprop, MCPB, mecoprop, thifensulfuron,
and tribenuron.
Handelsname
ACME MCPA AMINE 4®; AGRITOX®;
AGROXONE®; AGROZONE®; AGSCO®; ANICON
KOMBI®; ANICON M®; BANLENE®; BLESEL MC®;
BORDERMASTER®; BROMINAL M & PLUS®;
CAMBILENE®; CHEYENNE®; CHIMAC OXY®;
CHIPTOX®; CHWASTOX®; CORNOX M®; DAKOTA®;
DED WEED®; DICOPUR-M®; DICOTEX®; DOW
MCP AMINE WEED KILLER®; DYVEL®; EH1356
HERBICIDE®; EMCEPAN®; EMPAL®; ENVOY®;
HEDAPUR M 52®; HEDAREX M®; HEDONAL M®;
HERBICIDE M®; HORMOTUHO®; HORNOTUHO®;
KILSEM®; 4 K-2 M®; KVK®; LEGUMEX DB®;
LEUNA M®; LEYSPRAY®; LINORMONE®;
M 40®; 2 M-4C®; 2 M-4KH®; MALERBANE®;
MAYCLENE®; MEPHANAC®; MIDOX®; MXL®;
OKULTIN®; PHENOXYLENE 50®; PHENOXYLENE
PLUS®; PHENOXYLENE SUPER®; RAZOL DOCK
KILLER®; RHOMENE®; RHONOX®; SHAMOX®;
B-SELEKTONON M®; SEPPIC MMD®; TILLER®;
TRIMEC®; U 46®; VACATE®; VESAKONTUHO®;
WEEDAR®; WEEDAR MCPA CONCENTRATE®;
WEEDONE MCPA ESTER®; WEED RHAP®; ZELAN®
Sicherheitsprofil
Suspected carcinogen.
Poison by subcutaneous and intravenous
routes. Moderately toxic by ingestion.
Human systemic effects by ingestion: blood
pressure decrease and coma. Experimental
teratogenic and reproductive effects.
Mutation data reported. An herbicide. When
heated to decomposition it emits toxic
fumes of Cl-.
mögliche Exposition
A potential danger to those involved
in the manufacture, formulation, and application of this
postemergence herbicide, used for control of broadleaf
weeds in agricultural applications.
Environmental Fate
Biological. Cell-free extracts isolated from Pseudomonas sp. in a basal salt medium
degraded MCPA to 4-chloro-o-cresol and glyoxylic acid (Gamar and Gaunt, 1971).
Soil. Residual activity in soil is limited to approximately 3–4 months (Hartley and
Kidd, 1987).
Plant. The penetration, translocation and metabolism of radiolabeled MCPA in a
cornland weed (Galium aparine) was studied by Leafe (1962). Carbon dioxide was identified
as a metabolite but this could only account 7% of the applied MCPA. Though no
Photolytic. When MCPA in dilute aqueous solution was exposed to summer sunlight
or an indoor photoreactor (l >290 nm), 2-methyl-4-chlorophenol formed as the major
product as well as o-cresol and 4-chloro-2-formylphenol (Soderquist and Crosby, 1975).
Clapés et al. (1986) studied the photodecomposition of aqueous solution of MCPA (120
ppm, pH 5.4, 25°C) in a photoreactor equipped with a high pressure mercury lamp. After three minutes of irradiation, 4-chloro-2-methylphenol formed as an intermediate which
degraded to 2-methylphenol. Both compounds were not detected after 6 minutes of irradiation;
however, 1,4-dihydroxy-2-methylbenzene and 2-methyl-2,5-cyclohexadiene-1,4-
dione formed as major and minor photodecomposition products, respectively. The same
experiment was conducted using simulated sunlight (l <300 nm) in the presence of
riboflavin, a known photosensitizer. 4-Chloro-2-methylphenol and 4-chloro-2-methylbenzyl
formate formed as major and minor photoproducts, respectively (Clapés et al., 1986).
Ozone degraded MCPA in dilute aqueous solution with and without UV light (l >300
nm) (Benoit-Guyod et al., 1986).
Chemical/Physical. Reacts with alkalies forming water soluble salts (Hartley and Kidd,
1987). Ozonolysis of MCPA in the dark yielded the following benzenoid intermediates:
4-chloro-2-methylphenol, its formate ester, 5-chlorosalicyaldehyde, 5-chlo
Versand/Shipping
UN3345 Phenoxyacetic acid derivative pesticide,
solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN3077 Environmentally hazardous substances, solid,
n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous
material, Technical Name Required
läuterung methode
It is insoluble in H2O (solubility is 0.55g/L at 20o) and recrystallises from *C6H6 or chlorobenzene as plates [J.nsson et al. Acta Chem Scand 6 993 1952]. The S-benzylisothiouronium salt has m 164-165o, and the Cu2+ salt has m 247-249o(dec) [Armarego et al. Nature 183 1176 1959, UV: Duvaux & Grabe Acta Chem Scand 4 806 1950, IR: J.berg Acta Chem Scand 4 798 1950]. [Beilstein 6 IV 1991.] It is a plant growth substance and a herbicide.
Inkompatibilitäten
A weak acid. Compounds of the carboxyl group react with all bases, both inorganic and
organic (i.e., amines) releasing substantial heat, water and a
salt that may be harmful. Incompatible with arsenic compounds (releases hydrogen cyanide gas), diazo compounds,
dithiocarbamates, isocyanates, mercaptans, nitrides, and
sulfides (releasing heat, toxic, and possibly flammable
gases), thiosulfates and dithionites (releasing hydrogen
sulfate and oxides of sulfur). Incompatible with alkalis.
Waste disposal
Incineration with added flammable solvent; incinerator equipped with fume scrubber.
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
MCPA (ISO) Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
