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Chemical substance

Methyl nitrite

Also known as Nitrous acid, methyl ester, Methylester kyseliny dusite, Methyl nitrite [Forbidden]

CAS 624-91-9Formula CH3NO2Molar mass 61.04 g/molEC 210-870-5
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Methyl nitrite chemical structure, CH3NO2, CAS 624-91-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Gas
Melting point
-16 °C
Boiling point
64.6 °C
Density
0.991
Solubility
In water, 2.4 × 10⁻⁴ mg/L @ 25 °C /Estimated/
HS code
294200
UN number
UN 2455
Illustrative photo, a gas cylinder on a trolley on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Methyl nitrite?

Plain description, key identifiers and synonyms

Methyl nitrite appears as a liquid or gas Boils at 10.4 °F. Moderately toxic by inhalation. Narcotic in high concentrations. Used as a rocket propellant. Differs from nitromethane (H3CNO2).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl nitrite
CAS number
624-91-9 CAS number cross-checked
EC number
210-870-5
Molecular formula
CH3NO2
UNII
96TLP8RN37
InChIKey
BLLFVUPNHCTMSV-UHFFFAOYSA-N
InChI
InChI=1S/CH3NO2/c1-4-2-3/h1H3
SMILES (canonical and isomeric)
CON=O

Synonyms

  • Nitrous acid, methyl ester
  • Methylester kyseliny dusite
  • Methyl nitrite [Forbidden]
  • Methylnitrite
  • Methyl ester of nitrous acid

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

Appearance
Gasexp.
Melting point
-16 °Cexp.
Boiling point
64.6 °Cexp.
Density
0.991exp.
Solubility
In water, 2.4 × 10⁻⁴ mg/L @ 25 °C /Estimated/exp.
Vapour pressure
1,650 mm Hg @ 25 °C /Estimated/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
61.04 g/molcalc.
Exact mass
61.0164 Dacalc.
LogP (octanol/water)
0.31calc.
Topological polar surface area
38.66 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
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 classification
Hazard pictograms
UN number
UN 2455

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

Methyl nitrite suppliers

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Methyl nitrite 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

It has uses in the synthesis of nitrite and nitroso esters.

Rocket propellant (Former).

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 Methyl nitrite is traded under.

HS 2942.00Indicative HS code

Organic compounds not elsewhere classified in chapter 29

World exports in 2024
$589M
−43.5% vs 2023, imports $614M
2019 to 2024
Top exporters
  1. India * partner reported20.7%
  2. United States18.6%
  3. Italy10.4%
Top importers
  1. United States15.1%
  2. Italy6.7%
  3. Japan5.3%

* Partner reported figures, a lower bound.

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

The HS code shown for Methyl nitrite is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Methyl nitrite, based on the data on this page

What is Methyl nitrite?

Methyl nitrite appears as a liquid or gas Boils at 10.4 °F. Moderately toxic by inhalation. Narcotic in high concentrations. Used as a rocket propellant. Differs from nitromethane (H3CNO2).

What is the CAS number of Methyl nitrite?

The CAS registry number of Methyl nitrite is 624-91-9.

What is the molecular formula and weight of Methyl nitrite?

The molecular formula of Methyl nitrite is CH3NO2 and its molar mass is 61.04 g/mol.

What is Methyl nitrite used for?

It has uses in the synthesis of nitrite and nitroso esters. Rocket propellant (Former).

Is Methyl nitrite hazardous?

No GHS hazard classification for Methyl nitrite 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 Methyl nitrite?

Methyl nitrite is usually classified under HS code 294200 (XIII. OTHER ORGANIC COMPOUNDS, other organic compounds). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Methyl nitrite?

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What is the price of Methyl nitrite?

Suppliers quote Methyl nitrite 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 Methyl nitrite

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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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