Substance profile
Triethylamine
Triethylamine is a colorless liquid with a strong, ammoniacal ordor odor.
01 · Identification
What Triethylamine is
Triethylamine is a colorless liquid with a strong, ammoniacal ordor odor. Its molecular formula is C6H15N and its molecular weight is 101.19 g/mol. It boils at 88.8 °C, melts at -115 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
02 · Identifiers
Triethylamine identifiers and molecular data
Triethylamine CAS number and EC number
Triethylamine molecular formula and molecular weight
03 · GHS classification
Triethylamine hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Triethylamine pictograms and signal word
Triethylamine hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 2 | H225 | GHS02 |
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 3 | H311 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 3 | H331 | GHS06 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | GHS05 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Triethylamine hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H331 | Toxic if inhaled. |
| H311 | Toxic in contact with skin. |
| H301 | Toxic if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
| H318 | Causes serious eye damage. |
This page lists only the codes assigned to Triethylamine. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Triethylamine
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Triethylamine issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Triethylamine precautionary statements
CLP Annex VI assigns 18 precautionary statements to Triethylamine. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Triethylamine name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | триетиламин |
| Spanish español | Trietilamina |
| Czech čeština | triethylamin |
| Danish dansk | triethylamin |
| German Deutsch | Triethylamin |
| Estonian eesti | trietüülamiin |
| Greek ελληνικά | τριαιθυλαμίνη |
| English English | triethylamine |
| French français | triéthylamine |
| Croatian hrvatski | trietilamin |
| Italian italiano | trietilammina |
| Latvian latviešu | trietilamīns |
| Lithuanian lietuvių | trietilaminas |
| Hungarian magyar | trietilamin |
| Maltese Malti | trietilammina |
| Dutch Nederlands | triëthylamine |
| Polish polski | trietyloamina |
| Portuguese português | trietilamina |
| Romanian română | trietilamină |
| Slovak slovenčina | trietylamín |
| Slovenian slovenščina | trietilamin |
| Finnish suomi | trietyyliamiini |
| Swedish svenska | trietylamin |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Triethylamine GHS label elements
Everything CLP Annex VI fixes for Triethylamine, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Triethylamine
- Highly flammable liquid and vapour.
- Toxic if inhaled.
- Toxic in contact with skin.
- Toxic if swallowed.
- Causes severe skin burns and eye damage.
- Causes serious eye damage.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF INHALED:
- IF IN EYES:
- Immediately call a POISON CENTER/doctor/…
- Rinse mouth.
- Do NOT induce vomiting.
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Triethylamine in the GHS label constructor →
07 · Health hazards
Triethylamine health hazards and exposure limits
Triethylamine hazard summary
Acute (short-term) exposure of humans to triethylamine vapor causes eye irritation, corneal swelling, and halo vision. People have complained of seeing "blue haze" or having "smoky vision." These effects have been reversible upon cessation of exposure. Acute exposure can irritate the skin and mucous membranes in humans. Chronic (long-term) exposure of workers to triethylamine vapor has been observed to cause reversible corneal edema. Chronic inhalation exposure has resulted in respiratory and hematological effects and eye lesions in rats and rabbits. No information is available on the reproductive, developmental, or carcinogenic effects of triethylamine in humans. EPA has not classified triethylamine with respect to potential carcinogenicity.
Source: EPA Hazardous Air Pollutants
Triethylamine occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 25.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 25 ppm (100 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 25 ppm (100 mg/m3) See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 200 ppm (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 200.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 200 ppm | Hazardous Substances Data Bank (HSDB) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Triethylamine properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Triethylamine boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 88.8 °C (191.8 °F) | HSDB | |
| 89.44 °C (193 °F) | NIOSH | ||
| 89.28 °C (192.7 °F) | at 760 mmHg | CAMEO |
Triethylamine melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -114.7 °C (-174.5 °F) | HSDB | |
| -115 °C (-175 °F) | NIOSH | ||
| -114.72 °C (-174.5 °F) | CAMEO |
Triethylamine density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.7309 g/cm³ | HSDB | |
| 0.73 g/cm³ | NIOSH | ||
| 0.7275 g/cm³ | at 20 °C | HSDB |
Triethylamine solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with water below 18.7 °C | HSDB | |
| Soluble in ethanol, carbon tetrachloride, ethyl ether; very soluble in acetone, benzene, chloroform | HSDB | ||
| In water, 6.86X10+4 mg/L at 25 °C | at 25 °C | HSDB |
Triethylamine vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 54 mmHg | NIOSH | |
| 53.5 mmHg | CAMEO | ||
| 57.07 mmHg | at 25 °C | HSDB |
Triethylamine flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | -15 °C (5 °F) | HSDB | |
| -8.89 °C (16 °F) | HSDB | ||
| -6.67 °C (20 °F) | NIOSH |
Triethylamine autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 248.89 °C (480 °F) | HSDB | |
| 450 °C (842 °F) | CAMEO | ||
| 230 °C (446 °F) | ICSC |
Triethylamine lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.2 % by volume | HSDB |
Triethylamine upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 8 % by volume | HSDB |
Triethylamine vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.49 (air = 1) | HSDB | |
| 3.48 (air = 1) | CAMEO | ||
| 3.5 (air = 1) | ICSC |
Triethylamine odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor detection in air= 9.00X10-2 ppm (purity not specified) | HSDB | |
| Odor recognition in air= 2.80X10-1 ppm (purity not specified) | HSDB | ||
| Odor low: 0.36 mg/cu m; Odor high: 1.12 mg/cu m | HSDB |
Triethylamine critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 262.45 °C (504.4 °F) | HSDB |
Triethylamine corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Liquid triethylamine will attack some forms of plastics, rubber, and coatings | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Triethylamine fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Triethylamine fire potential
A very dangerous fire hazard when exposed to heat, flame, or oxidizers.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Triethylamine storage and handling
Triethylamine safe storage
Fireproof. Separated from incompatible materials and food and feedstuffs. See Chemical Dangers.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Triethylamine storage conditions
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Storage class (TRGS 510): Flammable liquids.
Source: Hazardous Substances Data Bank (HSDB)
Triethylamine incompatible materials
Incompatible materials: Strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
Triethylamine reactivity
TRIETHYLAMINE reacts violently with oxidizing agents. Reacts with Al and Zn. Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Triethylamine in the storage compatibility matrix →
11 · Transport
Triethylamine UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Triethylamine under UN 1296 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| TRIETHYLAMINE | 3 | FC | II | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 3 is “Flammable liquids” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Triethylamine | 3 | II | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 3 is “Flammable and combustible liquid” (49 CFR 173.2).
12 · Questions
Triethylamine — frequently asked questions
What is the CAS number of Triethylamine?
The CAS number of Triethylamine is 121-44-8. Its EC number is 204-469-4.
What is the chemical formula of Triethylamine?
The molecular formula of Triethylamine is C6H15N and its molecular weight is 101.19 g/mol.
What does a Triethylamine label have to show?
Under CLP Annex VI the label for Triethylamine carries the pictograms Flame, Skull and crossbones and Corrosion and the signal word is Danger.
Is Triethylamine flammable?
Yes. CLP Annex VI assigns Triethylamine H225 — highly flammable liquid and vapour. The flash point reported for it is -15 °C (5 °F) (HSDB).
Is Triethylamine a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Triethylamine. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for Triethylamine?
The US occupational exposure limit reported for Triethylamine is 25.0 [ppm] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Triethylamine?
The boiling point reported for Triethylamine is 88.8 °C (191.8 °F) (HSDB).
What is the melting point of Triethylamine?
The melting point reported for Triethylamine is -114.7 °C (-174.5 °F) (HSDB).
How should Triethylamine be stored?
CLP Annex VI assigns Triethylamine the storage statement P403. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Storage class (TRGS 510): Flammable liquids. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Triethylamine
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