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Sodium monoxide

Also known as Sodium oxide (NaO), Sodium monoxide, (solid), Monoxido de sodio

CAS 12401-86-4Formula HNa2O+Molar mass 62.99 g/molEC 235-641-7
Sodium monoxide chemical structure, HNa2O+, CAS 12401-86-4
2D chemical structure

Key facts

What buyers check first

Physical form
Granules
Density
2.27 @25 °C
HS code
281511
Category
Hydroxides and bases
UN number
UN 1825
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Sodium monoxide?

Plain description, key identifiers and synonyms

Sodium monoxide appears as a white granular material. It reacts with water to give sodium hydroxide with the evolution of heat. It is corrosive to metals and tissue. It is used in chemical manufacture.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, hydroxide
CAS number
12401-86-4 CAS number cross-checked
EC number
235-641-7
Molecular formula
HNa2O+
InChIKey
NTGONJLAOZZDJO-UHFFFAOYSA-M
InChI
InChI=1S/2Na.H2O/h;;1H2/q2*+1;/p-1
SMILES (canonical and isomeric)
[OH-].[Na+].[Na+]

Synonyms

  • Sodium oxide (NaO)
  • Sodium monoxide, (solid)
  • Monoxido de sodio
  • Monoxyde de sodium
  • Monoxido de sodio (Spanish DOT)
  • Monoxyde de sodium (French DOT)
  • disodium, hydroxide
  • Sodium Hydroxide (1mol/L in Water)
  • Sodium monoxide [UN1825] [Corrosive]

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
Granulesexp.
Density
2.27 @25 °Cexp.

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
62.99 g/molcalc.
Exact mass
62.9817 Dacalc.
LogP (octanol/water)
-6.17calc.
Topological polar surface area
30 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
1calc.
Stereocentres
0calc.
Components
3calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms
UN number
UN 1825
Transport hazard class
8

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

Sodium monoxide suppliers

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Sodium monoxide price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Sodium monoxide is traded under.

HS 2815.11Indicative HS code

Sodium hydroxide (caustic soda), solid

World exports in 2024
$531M
−18.1% vs 2023, imports $637M
2019 to 2024
Top exporters
  1. China43.5%
  2. India * partner reported7.7%
  3. Thailand6.0%
Top importers
  1. Indonesia8.6%
  2. United States5.8%
  3. Turkey3.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Sodium monoxide, based on the data on this page

What is Sodium monoxide?

Sodium monoxide appears as a white granular material. It reacts with water to give sodium hydroxide with the evolution of heat. It is corrosive to metals and tissue. It is used in chemical manufacture.

What is the CAS number of Sodium monoxide?

The CAS registry number of Sodium monoxide is 12401-86-4.

What is the molecular formula and weight of Sodium monoxide?

The molecular formula of Sodium monoxide is HNa2O+ and its molar mass is 62.99 g/mol.

What is Sodium monoxide used for?

Known uses and roles of Sodium monoxide include acids and alkalis in home care and cleaning.

Is Sodium monoxide hazardous?

No GHS hazard classification for Sodium monoxide 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 Sodium monoxide?

Sodium monoxide is usually classified under HS code 281511 (Sodium hydroxide (caustic soda), solid). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Sodium monoxide?

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What is the price of Sodium monoxide?

Suppliers quote Sodium monoxide 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 Sodium monoxide

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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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