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342440

Sigma-Aldrich

Cobalt(II) hydroxide

technical grade, 95%

Synonym(s):

Cobalt dihydroxide, Cobalt(2+) hydroxide, Cobaltous hydroxide

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About This Item

Linear Formula:
Co(OH)2
CAS Number:
21041-93-0
Molecular Weight:
92.95
EC Number:
244-166-4
MDL number:
MFCD00016015
UNSPSC Code:
12352302
PubChem Substance ID:
24861066
NACRES:
NA.23

grade

technical grade

Assay

95%

form

powder

density

3.597 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

SMILES string

O[Co]O

InChI

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

InChI key

ASKVAEGIVYSGNY-UHFFFAOYSA-L

Related Categories

General description

Cobalt(II) hydroxide is a versatile compound with various applications in battery manufacturing, sensors, supercapacitor, and magnetic materials. It is also used as a key component in the production of rechargeable lithium-ion batteries. Additionally, it is also used in electrochemical reactions, including the oxidation of glucose and the oxygen evolution reaction (OER).

Application

Cobalt(II) hydroxide can be used in the research and development :
  • As an additive in Ni-based rechargeable alkaline batteries, including Ni-Cd and Ni-MH batteries, to improve their electrochemical performance.   
  • To synthesize reduced graphene oxide/cobalt hydroxide (rGO/Co(OH)2) composite material, which exhibits enhanced electrochemical performance for supercapacitor applications.     
  • As a electrode material for high-performance supercapacitors. It exhibits high specific capacitance and long cycling stability, making it a promising electrode material for supercapacitors.

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 2 - Carc. 1B - Eye Irrit. 2 - Repr. 1B - Resp. Sens. 1B - Skin Sens. 1

Storage Class Code

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PRTR

Class I Designated Chemical Substances

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

342440-50G:
342440-VAR:
342440-250G:4548173313962
342440-BULK:

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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