Kieselgur, Natriumcarbonatschmelze-calciniert Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R48/20:Gesundheitssch?dlich: Gefahr ernster Gesundheitssch?den bei l?ngerer Exposition durch Einatmen.
R49:Kann Krebs erzeugen beim Einatmen.
R36/37:Reizt die Augen und die Atmungsorgane.
R36/38:Reizt die Augen und die Haut.
R45:Kann Krebs erzeugen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-S?tze Betriebsanweisung:
S22:Staub nicht einatmen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
white to off-white powder
Verwenden
Diatomaceous earth (hyflo supercel) may be used as an adsorbent for column chromatography.
Application
Hyflo supercel may be used for the separation
of mucopolysachharides by electrophoresis. It may be employed as filter
aid during the preparation of protein renin isolated from horse plasma.
Allgemeine Beschreibung
Chromosorb
W is a diatomite which provides solid support for the packed GC columns. It is suitable for use with polar compounds, due to its low surface area and high inertness.
Health Hazard
Amorphous silica, natural
diatomaceous earth, is usually considered to be
of low toxicity; however, pure amorphous silica
is rarely found.
m?gliche Exposition
Amorphous fumed silica is used as a mineral, natural or synthetic fiber. A potential danger to those involved in the production and handling of fumed silica for paint pigments or catalysts. Diatomaceous earth is used in clarifying liquids, in manufacture of fire brick and heat insulators; used as a filtering agent; as a filler in construction materials; pesticides, paints, and varnishes. A potential danger to those involved in mining of diatomaceous earth or fabrication of products there from.
Carcinogenicity
Amorphous silica has been tested for carcinogenicity
in a variety of animal studies by a
number of routes. Most of the tests were negative
or were inadequate primarily because of
poorly defined physiochemical characteristics
of the silica. The IARC concluded that evidence
is inadequate to describe amorphous
silica as carcinogenic in either experimental
animals or humans. Crystalline silica, however,
has been designated by IARC as a probable
human carcinogen (category 2A), based on
“sufficient evidence” in experimental animals
and “l(fā)imited evidence” in humans.Therefore,
although evidence for the carcinogenicity
of crystalline silica in humans is unconvincing,
certainly from exposures insufficient to cause
silicosis, appropriate hazard warnings are
obligatory in the United States. These apply
to all materials containing 0.1% or more of
crystalline silica (quartz, cristobalite, and/or
tridymite).
Inkompatibilit?ten
Silica, amorphous is a noncombustible solid. Generally unreactive chemically. Incompatible with fluorine, oxygen difluoride, chlorine trifluoride. Soluble in molten alkalis and reacts with most metallic oxides at high temperature.
Waste disposal
Sanitary landfill.
Kieselgur, Natriumcarbonatschmelze-calciniert Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
