Sodium chromate tetrahydrate

Bezeichnung:Sodium chromate tetrahydrate

CAS-Nr10034-82-9

Englisch Name:Sodium chromate tetrahydrate

CBNumberCB7250491

SummenformelCrH5NaO5

Molgewicht160.02

MOL-Datei10034-82-9.mol

Sodium chromate tetrahydrate physikalisch-chemischer Eigenschaften

Schmelzpunkt	792℃
Dichte	2.73
Löslichkeit	slightly soluble in ethanol
Aggregatzustand	Crystals
Farbe	Yellow
PH	pH (10g/l, 25℃) : 8.0～10.0
Geruch (Odor)	Odorless
Wasserlöslichkeit	Soluble in water.
Sensitive	Hygroscopic
Merck	14,8601
Expositionsgrenzwerte	ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin) OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
Stabilität	Stable. Incompatible with strong reducing agents, combustible materials, strong acids. Deliquescent.
CAS Datenbank	10034-82-9(CAS DataBase Reference)
EPA chemische Informationen	Sodium chromate(VI), tetrahydrate (10034-82-9)

Sicherheit

Kennzeichnung gefährlicher	T+,N
R-Sätze:	45-46-60-61-21-25-26-34-42/43-48/23-50/53
S-Sätze:	53-45-60-61
RIDADR	UN 3288 6.1/PG 2
WGK Germany	3
RTECS-Nr.	GB2958300
TSCA	Yes
HazardClass	6.1
PackingGroup	II

Gefahreninformationscode (GHS)

Sodium chromate tetrahydrate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R45:Kann Krebs erzeugen.
R46:Kann vererbbare Schäden verursachen.
R60:Kann die Fortpflanzungsfähigkeit beeinträchtigen.
R61:Kann das Kind im Mutterleib schädigen.
R21:Gesundheitsschädlich bei Berührung mit der Haut.
R25:Giftig beim Verschlucken.
R26:Sehr giftig beim Einatmen.
R34:Verursacht Verätzungen.
R42/43:Sensibilisierung durch Einatmen und Hautkontakt möglich.
R48/23:Giftig: Gefahr ernster Gesundheitsschäden bei längerer Exposition durch Einatmen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
S-Sätze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
Sodium chromate, including the hexahydrate, is yellow crystalline solids that can also be used in solution. Disodium dichromate (10588-01-9):
Chemische Eigenschaften
Sodium cyanide is found as white granules, flakes or lumps. Sodium cyanide is shipped as pellets or briquettes. Odorless when dry. It absorbs water from air (is hygroscopic or deliquescent). Hydrogen cyanide gas released by sodium cyanide has a distinctive mild, bitter almond odor, but a large proportion of people cannot detect it; the odor does not provide adequate warning of hazardous concentrations.
Chemische Eigenschaften
yellow deliquescent crystals
Verwenden
Sodium chromate tetrahydrate can be used as an oxidant in organic synthesis and also as a carrier electrolyte in the capillary electrophoresis.
Verwenden
Corrosion inhibitor, pigment manufactureSodium chromate tetrahydrate is used as a corrosion inhibitor, wood preservative and an auxiliary in textile industry. It serves as an oxidant, which is used to prepare carboxylic acids and ketones from primary and secondary alcohols respectively. Further, it is used as a starting material to prepare other chromium compounds and as a catalyst in organic synthesis especially pharmaceuticals and agro chemicals.
Allgemeine Beschreibung
Odorless bright yellow deliquescent crystals. Aqueous solutions are alkaline.
Air & Water Reaktionen
Deliquescent. Water soluble.
Reaktivität anzeigen
Sodium chromate tetrahydrate is a strong oxidizing agent. Incompatible with strong acids . Contact with combustible materials may lead to a fire. Toxic chromium oxide fumes may form in fire [USCG, 1999].
Brandgefahr
Literature sources indicate that Sodium chromate tetrahydrate is nonflammable.
mögliche Exposition
Used to make dyes, inks, pigments, and other chromates; in leather tanning, a corrosion inhibitor in circulating water systems; metal treatment; a drilling mud additive; chemical intermediate for chromium catalysts; colorimetry, oxidizing agent; bleaching agent; an algicide, fungicide, insecticide; in wood preservation.
Versand/Shipping
UN3087 Oxidizing solid, toxic, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 6.1-Poisonous materials, Technical Name Required. UN3085 Oxidizing solid, corrosive, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.
läuterung methode
Crystallise the chromate from hot water (0.8mL/g). It is deliquescent.
Inkompatibilitäten
Sodium cyanide decomposes on contact with acids, acid salts, water, moisture, alcohols, and carbon dioxide, releasing highly toxic and flammable hydrogen cyanide gas. Aqueous solution is a strong base; it reacts violently with acid and is corrosive. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Absorbs moisture from the air forming a corrosive syrup. Corrosive to active metals, such as aluminum, copper, and zinc. Under acid conditions, sarin hydrolyzes to form hydrofluoric acid.
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. 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. Add strong alkaline hypochlorite and react for 24 hours. Then flush to sewer with large volumes of water.

Sodium chromate tetrahydrate Upstream-Materialien And Downstream Produkte

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