Cobaltdihydroxid

Bezeichnung:Cobaltdihydroxid

CAS-Nr21041-93-0

Englisch Name:Cobalt(II) hydroxide

CBNumberCB0716301

SummenformelCoH2O2

Molgewicht92.95

MOL-Datei21041-93-0.mol

Synonyma

Cobaltdihydroxid

Cobaltdihydroxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	°Cd ec.)
Dichte	3.597 g/mL at 25 °C(lit.)
Dampfdruck	0Pa at 20℃
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	slightly soluble in H2O; soluble in acid solutions
Aggregatzustand	Powder
Wichte	3.597
Farbe	Pink to purple
PH	9.15(1 mM solution);9.15(10 mM solution);9.15(100 mM solution)
Wasserlöslichkeit	Soluble in acids and ammonia. Very slightly soluble in water. Insoluble in dilute alkalis.
Sensitive	Air Sensitive
Merck	14,2442
Solubility Product Constant (Ksp)	pKsp: 14.23
Expositionsgrenzwerte	ACGIH: TWA 0.02 mg/m3
Stabilität	Stability
CAS Datenbank	21041-93-0(CAS DataBase Reference)
EPA chemische Informationen	Cobalt hydroxide (Co(OH)2) (21041-93-0)

Sicherheit

Kennzeichnung gefährlicher	Xn,N
R-Sätze:	20/21/22-36/37/38-50/53-42/43-40-20/22
S-Sätze:	26-37/39-36
RIDADR	UN 3077 9 / PGIII
WGK Germany	3
RTECS-Nr.	GG0904500
TSCA	Yes

Gefahreninformationscode (GHS)

Cobalt(II) hydroxide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Beschreibung
The addition of alkali metal hydroxides to solutions of cobalt(II) salts results in the precipitation of cobalt(II) hydroxide in either a blue or pink form depending upon the conditions. The pink form is the more stable of the two and is obtained when a suspension of the blue form is allowed to stand or is warmed. Cobalt(II) hydroxide is amphoteric, dissolving in alkalis to form blue solutions of the [Co(OH)4]2- ions. In the presence of alkali, suspensions of Co(OH) are oxidized by air to the brown CoO(OH), this oxidation being brought about rapidly by oxidants such as hypochlorite, bromine water or hydrogen peroxide. The pink Co(OH)2 (density 3.597) has the brucite (Mg(OH)2) structure in which the cobalt atoms are surrounded by six hydroxides. The blue form is more disordered, but its structure is not known for certain.
Chemische Eigenschaften
Rose-red powder.Soluble in acids and ammonium salt solutions; insoluble in water and alkalies.
Verwenden
Cobalt salts, paint and varnish driers, catalyst, storage-battery electrodes.
Verwenden
Cobalt(II) hydroxide is used as a drying agent for paints and varnishes. It acts as an aid to dry the lithographic inks and catalyst in the preparation of battery electrode impregnating solutions. It is also involved in the synthesis of other cobalt compounds.
Flammability and Explosibility
Not classified

Cobalt(II) hydroxide Upstream-Materialien And Downstream Produkte

Cobaltdihydroxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

21041-93-0, Cobalt(II) hydroxide Verwandte Suche:

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