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Dye intermediates

Trimethylamine

Also known as N,N-dimethylmethanamine, Methanamine, N,N-dimethyl-, N-Trimethylamine

CAS 75-50-3Formula C3H9NMolar mass 59.11 g/molEC 200-875-0
GHS signal word: Danger. Pictograms: Flammable, Gas under pressure, Corrosive, Harmful or irritant 74 suppliers listed
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Trimethylamine chemical structure, C3H9N, CAS 75-50-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless gas at room temperature
Melting point
-117.1 °C
Boiling point
2.9 °C
Density
Relative density (water = 1): 0.6 (liquid)
Flash point
-7 °C
HS code
292111
Category
Dye intermediates
UN number
UN 1083
Illustrative photo, industrial gas cylinders secured with a safety chain in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Trimethylamine?

Plain description, key identifiers and synonyms

Trimethylamine is a tertiary amine that is ammonia in which each hydrogen atom is substituted by an methyl group. It has a role as a human xenobiotic metabolite and an Escherichia coli metabolite. It is a member of methylamines and a tertiary amine. It is a conjugate base of a trimethylammonium.

Trimethylamine is a chemical compound responsible of the rotten fish odor.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
N,N-dimethylmethanamine
CAS number
75-50-3 CAS number cross-checked
EC number
200-875-0
Molecular formula
C3H9N
UNII
LHH7G8O305
MDL number
MFCD00008327
InChIKey
GETQZCLCWQTVFV-UHFFFAOYSA-N
InChI
InChI=1S/C3H9N/c1-4(2)3/h1-3H3
SMILES (canonical and isomeric)
CN(C)C

Synonyms

  • N,N-dimethylmethanamine
  • Methanamine, N,N-dimethyl-
  • N-Trimethylamine
  • Dimethylmethaneamine
  • (CH3)3N
  • Trimethylamine, anhydrous
  • N,N,N-trimethylamine
  • Trimethylamine anhydrous
  • NMe3
  • Methylamine, N,N-dimethyl-
  • Trimethylamine (~25 wt. % solution in methanol)
  • methane, dimethylamino-
  • Trimethylamine 2.0M in THF
  • Trimethylamine, anhydrous [UN1083] [Flammable gas]
  • Trimethyl amine
  • Trimethylamin
  • Trimethylamine (~30 wt. % Solution in Ethanol)
  • tri-methylamine
  • trimethyl-amine
  • KEN
  • Trimethylamine (8CI), N,N-Dimethylmethanamine, N,N,N-Trimethylamine, N-Trimethylamine, Methanamine, N,N-dimethyl-
  • dimethylamino methane
  • trimethylamine (tma)
  • Trimethylaminum
  • tridimethylaminomethane
Show all 33 synonyms
  • N,N-dimethyl-Methanamine
  • N,N-Dimethylmethanamine #
  • Trimethylamine, >=99.0%
  • Trimethylamine, >=99.5%
  • 75-50-3(Tetrahydrofuran)
  • 75-50-3(Water)
  • Trimethylamine 2M in Isopropanol
  • N(CH3)3

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
Colorless gas at room temperatureexp.
Odour
Pungent, fishy, ammoniacalexp.
Taste
Old fishexp.
Melting point
-117.1 °Cexp.
Boiling point
2.9 °Cexp.
Density
Relative density (water = 1): 0.6 (liquid)exp.
Flash point
-7 °Cexp.
Autoignition temperature
190 °Cexp.
Solubility
In water, 8.9 × 10⁺⁵ mg/L at 30 °Cexp.
Vapour pressure
1610 mm Hg at 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
59.11 g/molcalc.
Exact mass
59.0735 Dacalc.
LogP (octanol/water)
0.18calc.
Topological polar surface area
3.24 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
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 signal word
Danger
GHS02: Flammable
Flammable
GHS04: Gas under pressure
Gas under pressure
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant
430NFPA 704 rating

Hazard statements

  • H220Extremely flammable gas.
  • H315Causes skin irritation.
  • H318Causes serious eye damage.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (22)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • 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.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P377Leaking gas fire: do not extinguish, unless leak can be stopped safely.
  • P381In case of leakage, eliminate all ignition sources.
  • P403Store in a well-ventilated place.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1083
Transport hazard class
2.1
Packing group
I

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

Trimethylamine suppliers

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All 74 suppliers
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Where suppliers are based

74 suppliers in 17 countries

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Trimethylamine 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

Organic synthesis, especially of choline salts, warning agent for natural gas, manufacture of disinfectants, flotation agent, insect attractant, quaternary ammonium compounds, plastics.

Reported uses (ppm):

Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#2173].

Manufacture of pesticides, textile dyes, and photochemicals.

Industrial uses: pH regulating agent, Binder, Intermediate.

Roles

  • Escherichia coli metabolite
  • animal metabolite
  • bacterial metabolite
  • eukaryotic metabolite
  • human metabolite
  • human xenobiotic metabolite
  • mammalian metabolite
  • metabolite
  • prokaryotic metabolite
  • xenobiotic metabolite

Functional uses

  • Flavouring and nutrient

How it is made

Preparation from paraformaldehyde and ammonium chloride, ... by the action of formaldehyde and formic acid on ammonia...

Interaction of methanol and ammonia over a catalyst at high temperature. The mono-, di-, and trimethylamines are produced, and yields are regulated by conditions. Method of purification: Azeotropic or extractive distillation.

Although methylamines can be prepared by a variety of methods including alkylation of ammonia with methyl halides, alkylation of ammonium chloride with methanol, hydrogenation of hydrogen cyanide, reductive amination of carbon monoxide or carbon dioxide

Read more

, and addition of ammonia to dimethylether, commercial processes involve reaction of methanol with ammonia. Reactions occur in the vapor phase over one or more fixed bed reactors to form the corresponding mono-, di-, and tri-methylamines. The technology to manufacture methylamines ... involves use of a solid acid catalyst for the methanol amination reaction. An equilibrium distribution of MMA, DMA, and TMA is produced that favors TMA at low ammonia:methanol molar ratios. For example, at an ammonia:methanol molar ratio of 1, the equilibrium product composition is 17 mol% MMA, 21 mol% DMA, and 62 mol% TMA.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-001-00-9[3]

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 Trimethylamine is traded under.

HS 2921.11Exact HS code

Methylamine, di- or trimethylamine and their salts

World exports in 2024
$177M
+16.2% vs 2023, imports $207M
2019 to 2024
Top exporters
  1. Belgium33.3%
  2. South Korea15.1%
  3. United States13.7%
Top importers
  1. Spain7.9%
  2. Brazil6.4%
  3. Philippines6.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Trimethylamine is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Trimethylamine, based on the data on this page

What is Trimethylamine?

Trimethylamine is a tertiary amine that is ammonia in which each hydrogen atom is substituted by an methyl group. It has a role as a human xenobiotic metabolite and an Escherichia coli metabolite. It is a member of methylamines and a tertiary amine. It is a conjugate base of a trimethylammonium.

What is the CAS number of Trimethylamine?

The CAS registry number of Trimethylamine is 75-50-3.

What is the molecular formula and weight of Trimethylamine?

The molecular formula of Trimethylamine is C3H9N and its molar mass is 59.11 g/mol.

What is Trimethylamine used for?

Organic synthesis, especially of choline salts, warning agent for natural gas, manufacture of disinfectants, flotation agent, insect attractant, quaternary ammonium compounds, plastics. Reported uses (ppm): Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#2173].

Is Trimethylamine hazardous?

Trimethylamine carries the GHS signal word "Danger". Main hazards: extremely flammable gas, causes skin irritation, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Trimethylamine?

Trimethylamine is usually classified under HS code 292111 (Methylamine, di- or trimethylamine and their salts). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Trimethylamine?

CompoundList lists 74 suppliers of Trimethylamine in United States, China, India, Japan and 13 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Trimethylamine in India?

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

What is the price of Trimethylamine?

Suppliers quote Trimethylamine 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 Trimethylamine

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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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