Bleihydrogenarsenat Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
GERUCHLOSES WEISSES SCHWERES PULVER
CHEMISCHE GEFAHREN
Die Substanz zersetzt sich beim Erhitzen über 270?unter Bildung von toxischen Rauchen, einschlie?lich Arsen, Blei und ihren Verbindungen.
ARBEITSPLATZGRENZWERTE
TLV: (als Pb_3(AsO_4)_2) 0.15 mg/m?(als TWA); Krebskategorie A1(best?tigte krebserzeugende Wirkung beim Menschen); BEI vorhanden; (ACGIH 2004).
MAK: Krebserzeugend Kategorie 1; Keimzellmutagen Kategorie 3A; (DFG 2004).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation des Staubes und durch Verschlucken.
INHALATIONSGEFAHREN
Verdampfung bei 20°C vernachl?ssigbar; eine gesundheitssch?dliche Partikelkonzentration in der Luft kann jedoch beim Dispergieren, vor allem als Pulver schnell erreicht werden.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt die Augen, die Haut und die Atemwege. M?glich sind Auswirkungen auf den Verdauungstrakt und das Nervensystem.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
M?glich sind Auswirkungen auf den Verdauungstrakt, das Nervensystem, Nieren, Leber und Blut. Krebserzeugend für den Menschen. Kann fruchtbarkeitssch?digend oder entwicklungssch?digend wirken.
LECKAGE
NICHT in die Kanalisation spülen. Verschüttetes Material in verschlie?baren Beh?ltern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgf?ltig sammeln. An sicheren Ort bringen. Pers?nliche Schutzausrüstung: Chemikalienschutzanzug mit umgebungsluftunabh?ngigem Atemschutzger?t.
R-S?tze Betriebsanweisung:
R45:Kann Krebs erzeugen.
R61:Kann das Kind im Mutterleib sch?digen.
R23/25:Giftig beim Einatmen und Verschlucken.
R33:Gefahr kumulativer Wirkungen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
R62:Kann m?glicherweise die Fortpflanzungsf?higkeit beeintr?chtigen.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
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.
Beschreibung
Lead arsenate appears as odourless white heavy powder and practically is insoluble in water. It is not combustible and emits irritating or toxic fumes (or gases) in a fire. Lead arsenate is currently used as a growth regulator on grape fruit crop. A large bulk of lead arsenate is also used annually to control cockroaches, silverfish, crickets, earthworms, and other soil-inhabiting insects on golf greens and lawns and on airport turf adjoining runways to reduce bird hazard related to earthworm. Lead arsenate is quite stable and readily accumulates in soils either as a result of use in specific soil treatments or foliar application. Lead arsenate insecticide was used in many countries, including Australia, Canada, New Zealand, and the United States. It was used for insect pests on apples and other fruit tree, garden crops and turf grasses, on rubber and coffee trees, and for mosquito abatement in cattle dips. All insecticidal uses of lead arsenate in the United States were officially banned on August 1, 1988 (U.S. EPA, 1988), with a comment that all registrations for insecticidal use had lapsed before that date. In Australia, use of lead arsenate decreased after the introduction of DDT in 1950, and it has not been used on exported crops since 1983.
Chemische Eigenschaften
Lead arsenate is an odorless, white, heavy powder. It is not combustible and emits irritating
or toxic fumes (or gases) in a fi re. Lead arsenate enters the body by inhalation, or from
contaminated food and beverages. It is used to make insecticides.
Verwenden
Lead arsenate [Pb3(AsO4)4] is a toxic commercial insecticide and herbicide.
Vorbereitung Methode
Lead arsenate is produced mainly from lead acetate, lead nitrate, and lead oxide and disodium arsenate.The direct reaction of arsenic acid with litharge in the presence of nitric acid gives a dilead arsenate. Com mercial lead arsenates contain mostly PbHAsO4 along with varying amounts of Pb3(AsO4)2. Accordingly, their lead content is higher and their As2O3 content lower than the levels calculated for PbHAsO4.
Health Hazard
Exposures to lead arsenate occur in work areas and it is absorbed into the body by inhalation
of its dust and by ingestion. It is irritating to the eyes, the skin, and the respiratory
tract, and causes adverse effects on the gastrointestinal tract, nervous system, kidneys,
liver, and blood. Accidental ingestion of lead arsenate in the workplace causes cough,
sore throat, abdominal pain, diarrhea, drowsiness, headache, nausea, vomiting, muscular
cramp, constipation, excitation, and disorientation in the worker.
m?gliche Exposition
Used as an insecticide, herbicide, and
in manufacture of drugs; veterinary tapeworm medicine.
Incompatibilities: Violent reactions occur from contact
with oxidizers, chemically active metals; strong acids.
Acids and acid mists cause the release of arsine, a deadly
gas. Decomposes above 270C forming toxic fumes including arsenic and lead compounds
Versand/Shipping
UN1617 Lead arsenates, Hazard Class: 6.1;
Labels: 6.1-Poisonous materials
Inkompatibilit?ten
Used as an insecticide, herbicide, and
in manufacture of drugs; veterinary tapeworm medicine.
Incompatibilities: Violent reactions occur from contact
with oxidizers, chemically active metals; strong acids.
Acids and acid mists cause the release of arsine, a deadly
gas. Decomposes above 270C forming toxic fumes including arsenic and lead compounds
Waste disposal
Long- term storage in large,
weatherproof, and sift-proof storage bins or silos; may be
disposed of by conversion to soluble salt, such as chloride,
precipitation as sulfide and return to supplier
Bleihydrogenarsenat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
