Dinatriumhydrogenarsenat Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE BIS WEISSE KRISTALLE ODER PULVER.
CHEMISCHE GEFAHREN
Beim Erhitzen bilden sich giftige Rauche. Reagiert mit Säuren unter Freisetzung von giftigem Arsingas (s. ICSC 0222). Greift viele Metalle wie Eisen, Aluminium und Zink in Gegenwart von Wasser an unter Freisetzung giftiger Rauche mit Arsen und Arsin.
ARBEITSPLATZGRENZWERTE
TLV (als As): 0,01 mg/m?(als TWA); Krebskategorie A1 (bestätigte krebserzeugende Wirkung beim Menschen); BEI vorhanden; (ACGIH 2005).
MAK: Krebserzeugend Kategorie 1; Keimzellmutagen Kategorie 3A; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation des Aerosols und durch Verschlucken.
INHALATIONSGEFAHREN
Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch beim Dispergieren schnell erreicht werden.
LECKAGE
Verschüttetes Material aufsaugen. Reste sorgfältig sammeln. An sicheren Ort bringen. Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät. NICHT in die Umwelt gelangen lassen.
Chemische Eigenschaften
Sodium arsenate is currently registered for use as ant bait. These baits are used in approximately
1% of US homes. Sodium arsenate is a pentavalent form of inorganic arsenic. It is
a heptahydrate that normally exists as colorless crystals with no discernible odor. Sodium
arsenate contains 24% arsenic.
Verwenden
Mordant and assist in dyeing and printing, other
arsenates, germicide.
synthetische
Sodium arsenate is obtained by roasting a mixture of arsenic oxide with sodium carbon ate and sodium nitrate in the presence of air.In addition, this compound can be easily obtained by calcining sodium arsenate(III) in the pres ence of air.
Definition
ChEBI: An inorganic sodium salt composed from sodium cations and arsenate dianions in a 2:1 ratio.
Hazard
Toxic by ingestion and inhalation.
Health Hazard
Exposures to arsenic acid disodium salt cause adverse health effects. The symptoms of
poisoning include, but are not limited to, cough, headache, sore throat, weakness, respiratory distress, labored breathing, irritation to the eyes, and skin, dermatitis, mucous
membranes, the respiratory tract, and pigmentation disorders. Repeated or prolonged
contact with arsenic acid disodium salt causes cardiovascular disorders affects the nervous system, neuropathy, and kidneys, resulting in severe gastroenteritis, loss of fl uids
and electrolytes, kidney impairment, collapse, shock, and death.
Kontakt-Allergie
Arsenic salts are sensitizers, but most often irritants.
They are used in copper or gold extraction, glass,
feeds, weedkillers, insecticides, and ceramics. A recent
case was reported in a crystal factory worker with positive
patch tests to sodium arsenate.
Sicherheitsprofil
Confirmed human
carcinogen. Poison by intraperitoneal route.
Human mutation data reported. When
heated to decomposition it emits toxic
fumes of arsenic. See ARSENIC
COMPOUNDS.
mögliche Exposition
Sodium arsenate is used in
dyeing and printing; making other arsenates; as a germicide;
in dyeing with turkey-red oil.
Lager
It is important to keep stored organic arsenic compounds in a cool, dry, well-ventilated
area in tightly sealed containers and with proper labels and identifi cation. The storage
containers of organic arsenic compounds should be protected from physical damage and
stored separately from oxidizers such as perchlorates, peroxides, permanganates, chlorates,
or nitrates, and strong acids such as hydrochloric, sulfuric, or nitric acid. Further,
specifi c organic arsenic compounds must have separate storage requirements, which
should be evaluated prior to storage.
Vorsichtsmaßnahmen
During handling and use of arsenic compounds, workers should use appropriate personal
protective clothing and equipment. Users/workers must be careful during use, and maintain
effective measures to prevent skin contact with organic arsenic compounds. The selection
of the appropriate personal protective equipment (PPE), such as gloves, sleeves, and
encapsulating suits should be based on the extent of the worker’s potential exposure to
organic arsenic compounds. The users and the management should periodically evaluate
and determine the effectiveness of the chemical-resistant clothing in preventing dermal
contact and ensuring users’ safety.
Dinatriumhydrogenarsenat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
