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Alcohols and polyols

Potassium methoxide

Also known as Potassium methanolate, Potassium methylate, Methanol, potassium salt

CAS 865-33-8Formula CH3KOMolar mass 70.13 g/molEC 212-736-1
GHS signal word: Danger. Pictograms: Flammable, Corrosive 19 suppliers listed
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Potassium methoxide chemical structure, CH3KO, CAS 865-33-8
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Powder
Melting point
>50
Density
1.7 g/cm³
Flash point
11 °C
Solubility
Solubility in water: reaction
HS code
290511
Category
Alcohols and polyols
UN number
UN 3206
Illustrative photo, closed jumbo bulk bags in a warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Potassium methoxide?

Plain description, key identifiers and synonyms

Potassium methoxide is a chemical substance with the molecular formula CH3KO and a molar mass of 70.13 g/mol. Its CAS registry number is 865-33-8. The IUPAC name is potassium methanolate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
potassium methanolate
CAS number
865-33-8 CAS number cross-checked
EC number
212-736-1
Molecular formula
CH3KO
UNII
45MYQ0GWGB
MDL number
MFCD00012416
InChIKey
BDAWXSQJJCIFIK-UHFFFAOYSA-N
InChI
InChI=1S/CH3O.K/c1-2;/h1H3;/q-1;+1
SMILES (canonical and isomeric)
C[O-].[K+]

Synonyms

  • Potassium methanolate
  • Potassium methylate
  • Methanol, potassium salt
  • Methanol, potassium salt (1:1)
  • Methoxy potassium
  • potassium, methanolate
  • Methoxypotassium
  • KOMe
  • MeOK
  • Feldalat km
  • KOCH3
  • Potassium methoxide, 90%
  • PotassiummethoxideClotrimazole
  • Potassium methoxide 25% in methanol
  • Potassium methoxide, 25% w/w in methanol
  • Potassium methoxide solution ~25% in methanol
  • Potassium methoxide (25% w/w solution in methanol)
  • sodium 2-[[(1S,2S,3aR,9aR)-2-hydroxy-1-[(3R)-3-hydroxyoctyl]-2,3,3a,4,9,9a-hexahydro-1H-cyclopenta[g]naphthalen-5-yl]oxy]acetate
  • sodium 2-[[(1S,2S,3aR,9aR)-2-oxidanyl-1-[(3R)-3-oxidanyloctyl]-2,3,3a,4,9,9a-hexahydro-1H-cyclopenta[g]naphthalen-5-yl]oxy]ethanoate

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.
Melting point
>50exp.
Density
1.7 g/cm³exp.
Flash point
11 °Cexp.
Autoignition temperature
>50exp.
Solubility
Solubility in water: reactionexp.
Vapour pressure
Vapor pressure, Pa at 25 °C: (negligible)exp.

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
70.13 g/molcalc.
Exact mass
69.9821 Dacalc.
LogP (octanol/water)
-4.02calc.
Topological polar surface area
23.06 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive

Hazard statements

  • H251Self-heating, may catch fire.
  • H314Causes severe skin burns and eye damage.
Precautionary statements (17)
  • P235Keep cool.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P407Maintain air gap between stacks or pallets.
  • P410Protect from sunlight.
  • P413Store bulk masses at temperatures not exceeding the specified limit.
  • P420Store separately.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3206
Transport hazard class
4.2

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

Full safety data and first aid

Potassium methoxide suppliers

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

All 19 suppliers
19 of 19 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

19 suppliers in 6 countries

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Potassium methoxide 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: Intermediate.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 603-040-00-2[2]

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 Potassium methoxide is traded under.

HS 2905.11Indicative HS code

Methanol (methyl alcohol)

World exports in 2024
$10.6B
+16.6% vs 2023, imports $11.6B
2019 to 2024
Top exporters
  1. Trinidad and Tobago * partner reported16.0%
  2. Oman * partner reported14.1%
  3. Saudi Arabia12.1%
Top importers
  1. China34.3%
  2. Netherlands9.1%
  3. Brazil6.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Potassium methoxide, based on the data on this page

What is Potassium methoxide?

Potassium methoxide is a chemical substance with the molecular formula CH3KO and a molar mass of 70.13 g/mol. Its CAS registry number is 865-33-8. The IUPAC name is potassium methanolate.

What is the CAS number of Potassium methoxide?

The CAS registry number of Potassium methoxide is 865-33-8.

What is the molecular formula and weight of Potassium methoxide?

The molecular formula of Potassium methoxide is CH3KO and its molar mass is 70.13 g/mol.

What is Potassium methoxide used for?

Industrial uses: Intermediate.

Is Potassium methoxide hazardous?

Potassium methoxide carries the GHS signal word "Danger". Main hazards: self-heating, may catch fire, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Potassium methoxide?

Potassium methoxide is usually classified under HS code 290511 (Methanol (methyl alcohol)). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Potassium methoxide?

CompoundList lists 19 suppliers of Potassium methoxide in China, India, United Arab Emirates, Germany and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Potassium methoxide in India?

4 suppliers in India list Potassium methoxide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Potassium methoxide?

Suppliers quote Potassium methoxide 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 Potassium methoxide

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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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