Substance profile
Diethylamine
Diethylamine is a colorless liquid with a fishy, ammonia-like odor.
01 · Identification
What Diethylamine is
Diethylamine is a colorless liquid with a fishy, ammonia-like odor. Its molecular formula is C4H11N and its molecular weight is 73.14 g/mol. It boils at 55.5 °C, melts at -50 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Diethylamine identifiers and molecular data
Diethylamine CAS number and EC number
Diethylamine molecular formula and molecular weight
03 · GHS classification
Diethylamine hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Diethylamine pictograms and signal word
Diethylamine 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 4 | H302 | GHS07 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 4 | H312 | GHS07 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | 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.
Diethylamine hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
This page lists only the codes assigned to Diethylamine. 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 Diethylamine
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 Diethylamine 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
Diethylamine precautionary statements
CLP Annex VI assigns 17 precautionary statements to Diethylamine. 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
Diethylamine 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 | диетиламин |
| Spanish español | Dietilamina |
| Czech čeština | diethylamin |
| Danish dansk | diethylamin |
| German Deutsch | Diethylamin |
| Estonian eesti | dietüülamiin |
| Greek ελληνικά | διαιθυλαμίνη |
| English English | diethylamine |
| French français | diéthylamine |
| Croatian hrvatski | dietilamin |
| Italian italiano | dietilamina |
| Latvian latviešu | dietilamīns |
| Lithuanian lietuvių | dietilaminas |
| Hungarian magyar | dietilamin |
| Maltese Malti | karbonat tad-diċikloessilmetil (INNCN) |
| Dutch Nederlands | diëthylamine |
| Polish polski | dietyloamina |
| Portuguese português | dietilamina |
| Romanian română | dietilamină |
| Slovak slovenčina | dietylamín |
| Slovenian slovenščina | dietilamin |
| Finnish suomi | dietyyliamiini |
| Swedish svenska | dietylamin |
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
Diethylamine GHS label elements
Everything CLP Annex VI fixes for Diethylamine, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Diethylamine
- Highly flammable liquid and vapour.
- Harmful if inhaled.
- Harmful in contact with skin.
- Harmful if swallowed.
- Causes severe skin burns and 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:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Do NOT induce vomiting.
- 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 Diethylamine in the GHS label constructor →
07 · Health hazards
Diethylamine health hazards and exposure limits
Diethylamine hazard summary
Diethylamine can cause necrosis to the skin. Rabbits exposed to 100 ppm, 7 hours/day, 5 days/week for 6 weeks have bronchopneumonia; [ACGIH] If left on clothing, can cause reddening of skin; [CHRIS] Corrosive to skin; [Quick CPC] Causes liver damage in high-dose animal studies; [HSDB] A corrosive substance that can cause pulmonary edema; [ICSC]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Diethylamine carcinogenicity classification
Under the conditions of these 2-year inhalation studies, there was no evidence of carcinogenic activity of diethylamine in male or female F344/N rats exposed to 31, 62.5, or 125 ppm. There was no evidence of carcinogenic activity of diethylamine in male or female B6C3F1 mice exposed to 16, 31, or 62.5 ppm.
Source: US National Toxicology Program · TR-566: Toxicology and Carcinogenesis Studies of Diethylamine (CASRN 109-89-7) in F344/N Rats and B6C3F1 Mice (Inhalation studies) (2011 )
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Diethylamine occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 25.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 25 ppm (75 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 25 ppm (75 mg/m3) See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 10 ppm (30 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | 25 ppm (75 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 10 ppm (30 mg/m3) ST 25 ppm (75 mg/m3) | 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
Diethylamine 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.
Diethylamine boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 55.5 °C (131.9 °F) | HSDB | |
| 55.56 °C (132 °F) | NIOSH | ||
| 55.5 °C (131.9 °F) | at 760 mmHg | CAMEO |
Diethylamine melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -50 °C (-58 °F) | HSDB |
Diethylamine density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.246 g/cm³ | HSDB | |
| 0.71 g/cm³ | NIOSH | ||
| 0.7056 g/cm³ | at 20 °C | HSDB |
Diethylamine solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with water, alcohol | HSDB | |
| Soluble in ether and carbon tetrachloride | HSDB | ||
| In water, infinitely soluble /1X10+6 mg/L/ at 25 °C | at 25 °C | HSDB |
Diethylamine vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 192 mmHg | NIOSH | |
| 195 mmHg | at 20 °C | CAMEO | |
| 237 mmHg | at 25 °C | HSDB |
Diethylamine flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | -22.99 °C (-9.4 °F) | HSDB | |
| -15 °C (5 °F) | HSDB | ||
| 17.8 °C (64 °F) | HSDB |
Diethylamine autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 312.22 °C (594 °F) | HSDB | |
| 312 °C (593.6 °F) | ICSC |
Diethylamine lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.8 % by volume | HSDB |
Diethylamine upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 10.1 % by volume | HSDB |
Diethylamine vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 2.52 (air = 1) | HSDB | |
| 2.53 (air = 1) | CAMEO | ||
| 2.5 (air = 1) | ICSC |
Diethylamine odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor detection in air= 2.0X10-2 ppm (Purity not specified) | HSDB | |
| Odor recognition in air= 6.0X10-2 ppm (Purity not specified) | HSDB | ||
| Odor detection in water= 1.21X10+1 ppm (Chemically pure) | HSDB |
Diethylamine critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 226.35 °C (439.4 °F) | HSDB |
Diethylamine corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Liquid diethylamine 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
Diethylamine 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.
Diethylamine fire potential
A very dangerous fire hazard when exposed to heat, flame, or oxidizers.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Diethylamine storage and handling
Diethylamine safe storage
Fireproof. Separated from strong oxidizers, strong acids, organic compounds and food and feedstuffs. Cool. Well closed. Store only in original container. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Diethylamine 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)
Diethylamine incompatible materials
Incompatible materials: Aldehydes, alcohols, dicyanofurazan, ketones, phenols, acids, halogenated hydrocarbon, oxidizing agents, epoxides.
Source: Hazardous Substances Data Bank (HSDB)
Diethylamine reactivity
DIETHYLAMINE is strongly alkaline. Incompatible with strong oxidizing agents and with strong acids. Violent reactions occur with sulfuric acid. Causes ignition on contact with cellulose nitrate. Explodes on contact with dicyanofurazan or dicyanofuroxan. Attacks some forms of plastics, rubber and coatings. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Diethylamine in the storage compatibility matrix →
11 · Transport
Diethylamine 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.
Diethylamine under UN 1154 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| DIETHYLAMINE | 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) |
|---|---|---|---|
| Diethylamine | 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
Diethylamine — frequently asked questions
What is the CAS number of Diethylamine?
The CAS number of Diethylamine is 109-89-7. Its EC number is 203-716-3.
What is the chemical formula of Diethylamine?
The molecular formula of Diethylamine is C4H11N and its molecular weight is 73.14 g/mol.
What does a Diethylamine label have to show?
Under CLP Annex VI the label for Diethylamine carries the pictograms Flame, Corrosion and Exclamation mark and the signal word is Danger.
Is Diethylamine flammable?
Yes. CLP Annex VI assigns Diethylamine H225 — highly flammable liquid and vapour. The flash point reported for it is -22.99 °C (-9.4 °F) (HSDB).
Is Diethylamine a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Diethylamine. 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 Diethylamine?
The US occupational exposure limit reported for Diethylamine 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 Diethylamine?
The boiling point reported for Diethylamine is 55.5 °C (131.9 °F) (HSDB).
What is the melting point of Diethylamine?
The melting point reported for Diethylamine is -50 °C (-58 °F) (HSDB).
How should Diethylamine be stored?
CLP Annex VI assigns Diethylamine 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 Diethylamine
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