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Hydroxides and bases

Cobalt hydroxide

Also known as Cobaltous hydroxide, Cobalt(2+) hydroxide, cobalt(2+), dihydroxide

CAS 21041-93-0Formula H2CoO2Molar mass 92.95 g/molEC 235-763-0
37 suppliers listed
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Cobalt hydroxide chemical structure, H2CoO2, CAS 21041-93-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
21041-93-0
Formula
H2CoO2
Molar mass
92.95 g/mol
Physical form
Powder
HS code
282200
Category
Hydroxides and bases
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Cobalt hydroxide?

Plain description, key identifiers and synonyms

Cobalt hydroxide is a chemical substance with the molecular formula H2CoO2 and a molar mass of 92.95 g/mol. Its CAS registry number is 21041-93-0. The IUPAC name is cobalt(2+) dihydroxide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cobalt(2+) dihydroxide
CAS number
21041-93-0 CAS number cross-checkedOther or deprecated CAS: 12672-51-4
EC numbers
235-763-0, 244-166-4
Molecular formula
H2CoO2
UNII
51B9AYG60K
InChIKey
ASKVAEGIVYSGNY-UHFFFAOYSA-L
InChI
InChI=1S/Co.2H2O/h;2*1H2/q+2;;/p-2
SMILES (canonical and isomeric)
[OH-].[OH-].[Co+2]

Synonyms

  • Cobaltous hydroxide
  • Cobalt(2+) hydroxide
  • cobalt(2+), dihydroxide
  • cobaltous, dihydroxide
  • CoH2O2

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Powderexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
92.95 g/molcalc.
Exact mass
92.9387 Dacalc.
LogP (octanol/water)
-0.36calc.
Topological polar surface area
60 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Cobalt hydroxide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 37 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

37 suppliers in 12 countries

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Cobalt hydroxide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Conductive agent, Processing aids not otherwise specified, Catalyst, Intermediate, Surface modifier.

Consumer uses: Catalyst, Chemical reaction regulator.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Cobalt hydroxide is traded under.

HS 2822.00Indicative HS code

Commercial cobalt oxides

World exports in 2024
$200M
−43.1% vs 2023, imports $305M
2019 to 2024
Top exporters
  1. China43.6%
  2. Belgium36.1%
  3. United Kingdom8.0%
Top importers
  1. South Korea25.1%
  2. Belgium18.2%
  3. United States12.0%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Cobalt hydroxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Cobalt hydroxide, based on the data on this page

What is Cobalt hydroxide?

Cobalt hydroxide is a chemical substance with the molecular formula H2CoO2 and a molar mass of 92.95 g/mol. Its CAS registry number is 21041-93-0. The IUPAC name is cobalt(2+) dihydroxide.

What is the CAS number of Cobalt hydroxide?

The CAS registry number of Cobalt hydroxide is 21041-93-0. Other or deprecated CAS numbers: 12672-51-4.

What is the molecular formula and weight of Cobalt hydroxide?

The molecular formula of Cobalt hydroxide is H2CoO2 and its molar mass is 92.95 g/mol.

What is Cobalt hydroxide used for?

Industrial uses: Conductive agent, Processing aids not otherwise specified, Catalyst, Intermediate, Surface modifier. Consumer uses: Catalyst, Chemical reaction regulator.

Is Cobalt hydroxide hazardous?

No GHS hazard classification for Cobalt hydroxide is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Cobalt hydroxide?

Cobalt hydroxide is usually classified under HS code 282200 (Cobalt oxides and hydroxides, commercial cobalt oxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cobalt hydroxide?

CompoundList lists 37 suppliers of Cobalt hydroxide in United States, China, United Kingdom, Germany and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cobalt hydroxide in India?

2 suppliers in India list Cobalt hydroxide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cobalt hydroxide?

Suppliers quote Cobalt hydroxide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Cobalt hydroxide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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