Cobalt hydroxide

Basic Information

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CAS Number

21041-93-0

Molecular Formula

CoH2O2

Molecular Weight

92.95 g/mol

EINECS

244-166-4

Chemical Classification

Basic Chemical Raw Materials Inorganic Chemicals Acids

Basic Physical Properties

Melting Point

°Cd ec.)

Density

3.597 g/mL at 25 °C

Water Solubility

Soluble in acids and ammonia. Very slightly soluble in water. Insoluble in dilute alkalis.

Vapor Pressure

0Pa at 20℃

SMILES

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O[Co]O

InChI

InChI=1S/Co.2H2O/h;2*1H2/q+2;;/p-2

InChIKey

ASKVAEGIVYSGNY-UHFFFAOYSA-L

LogP

-1.1165

Topological Polar Surface Area

40.46 Å²

Hydrogen Bond Donor/Acceptor

2 / 2

Complexity

2.8

Safety Information

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GHS Hazard Pictograms

H302

H312

H315

H319

H332

H335

Hazard Statement

H302 Harmful if swallowed
Acute toxicity, oral

H312 Harmful in contact with skin
Acute toxicity, dermal

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H332 Harmful if inhaled
Acute toxicity, inhalation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Stability

稳定

Sensitiveness

Air Sensitive

Synonyms & References

English

Cobalt(II) hydroxide technical grade, 95%
cobalt (Ⅱ) hydroxide
Cobalt(II) hydroxide, 99.9% trace metals basis
Cobalt(II) hydroxideUltra Pure, ≥ 99.9% (Assay)
Cobalt(II) hydroxide≥ 97% (Assay)
COBALT HYDROXIDE BLACK
COBALT(II) HYDROXIDE
cobalt(2+)hydroxide
Cobalt(II) hydroxide
cobaltdihydroxide
cobalthydroxide(co(oh)2)
cobaltoushydroxide
COBALT HYDROXID
Cobalt Hydroxide
Cobalt (II) hydroxide

MDL Number

MFCD00016015

EC Number

244-166-4

Customs Code

2822009000

FAQ

What are the physical and chemical properties of Cobalt hydroxide (CAS: 21041-93-0)?

Cobalt hydroxide (CAS: 21041-93-0) is a layered, hydrated inorganic compound with a crystalline structure. Its molecular weight is approximately 93.90 g/mol. It is slightly soluble in water and slightly basic. Cobalt hydroxide is stable under normal conditions but can react with acids to form cobalt salts. It is commonly used in the preparation of other cobalt compounds and as a precipitating agent in the purification of cobalt ions.

How is cobalt hydroxide (CAS: 21041-93-0) typically synthesized?

Cobalt hydroxide (CAS: 21041-93-0) can be synthesized by reacting cobalt salts with an aqueous base such as sodium hydroxide (NaOH) or potassium hydroxide (KOH). The reaction typically proceeds with the addition of the base to a cobalt salt solution, leading to the formation of a precipitate of cobalt hydroxide. This synthesis method is relatively simple and can be carried out under mild conditions.

What industries use cobalt hydroxide (CAS: 21041-93-0)?

Cobalt hydroxide (CAS: 21041-93-0) is primarily used in the production of electronic materials, particularly in the preparation of cobalt oxide and cobalt ferrite, which are key components in magnetic storage devices and sensors. It is also utilized in the production of pigments and in the purification of cobalt ions in the chemical industry.

What precautions should be taken when handling cobalt hydroxide (CAS: 21041-93-0)?

When handling cobalt hydroxide (CAS: 21041-93-0), it is important to work in a fume hood and wear appropriate personal protective equipment (PPE) such as gloves and safety goggles. Cobalt hydroxide is not highly toxic but can cause skin irritation and respiratory issues if inhaled. In case of a spill, it should be handled carefully and disposed of according to local regulations. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal instructions.