Substance profile
Cyclohexylamine
Cyclohexylamine is a colorless or yellow liquid with a strong, fishy, amine odor.
01 · Identification
What Cyclohexylamine is
Cyclohexylamine is a colorless or yellow liquid with a strong, fishy, amine odor. It boils at 135 °C, melts at -17.7 °C, is very soluble in water.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Cyclohexylamine identifiers and molecular data
Cyclohexylamine CAS number and EC number
Cyclohexylamine molecular formula and molecular weight
03 · GHS classification
Cyclohexylamine hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Cyclohexylamine pictograms and signal word
Cyclohexylamine hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 3 | H226 | GHS02 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 4 | H312 | 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.
Cyclohexylamine hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H361f | Suspected of damaging fertility. |
| 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 Cyclohexylamine. 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 Cyclohexylamine
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 Cyclohexylamine 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
Cyclohexylamine precautionary statements
CLP Annex VI assigns 15 precautionary statements to Cyclohexylamine. 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
Cyclohexylamine 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 | циклохексиламин |
| Spanish español | Ciclohexilamina |
| Czech čeština | cyklohexylamin |
| Danish dansk | cyclohexylamin |
| German Deutsch | Cyclohexylamin |
| Estonian eesti | tsükloheksüülamiin |
| Greek ελληνικά | κυκλοεξυλαμίνη |
| English English | cyclohexylamine |
| French français | cyclohexylamine |
| Croatian hrvatski | cikloheksilamin |
| Italian italiano | cicloesilammina |
| Latvian latviešu | cikloheksilamīns |
| Lithuanian lietuvių | cikloheksilaminas |
| Hungarian magyar | ciklohexilamin |
| Maltese Malti | ċikloessilammina |
| Dutch Nederlands | cyclohexylamine |
| Polish polski | cykloheksyloamina CHA |
| Portuguese português | ciclo-hexilamina |
| Romanian română | ciclohexilamină |
| Slovak slovenčina | cyklohexylamín cyklohexánamín |
| Slovenian slovenščina | cikloheksilamin |
| Finnish suomi | sykloheksyyliamiini |
| Swedish svenska | cyklohexylamin |
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
Cyclohexylamine GHS label elements
Everything CLP Annex VI fixes for Cyclohexylamine, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Cyclohexylamine
- Flammable liquid and vapour.
- Suspected of damaging fertility.
- 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.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- 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 Cyclohexylamine in the GHS label constructor →
07 · Health hazards
Cyclohexylamine health hazards and exposure limits
Cyclohexylamine hazard summary
Cyclohexylamine has moderate skin sensitizing potential and is a weak methemoglobin inducer. Listed in the table Examples of Industrial Chemicals for Which Methemoglobin Formation is NOT the Principal Cause of Toxicity; [ACGIH] Merck Index # 2729; Causes second and third degree burns after short skin exposure; [CHRIS] Corrosive to skin; [Quick CPC] Corrosive to the skin, eyes, and respiratory tract; Inhalation of high concentrations may cause CNS effects; [ICSC] No apparent effects in workers exposed to 4-10 ppm; Inhalation of high concentrations could cause pulmonary edema; A 25% solution produced severe irritation of the skin in humans; May cause permanent eye injury; Transient visual effects (blue haze or halo vision) occur at low concentrations; [CHEMINFO]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Cyclohexylamine occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 10 ppm (40 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 10 ppm (40 mg/m3) | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
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
Cyclohexylamine 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.
Cyclohexylamine boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 134.5 °C (274.1 °F) | at 760 mmHg | HSDB |
| 134.44 °C (274 °F) | NIOSH |
Cyclohexylamine melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -17.7 °C (0.1 °F) | HSDB | |
| -17.78 °C (0 °F) | NIOSH | ||
| -17.72 °C (0.1 °F) | CAMEO |
Cyclohexylamine density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.87 g/cm³ | NIOSH | |
| 0.8647 g/cm³ | at 25 °C | HSDB |
Cyclohexylamine solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Very soluble in ethanol, miscible in ether and acetone. | HSDB | |
| Miscible with common organic solvents: alcohol, ethers, ketones, esters, aliphatic hydrocarbons; completely miscible with aromatic hydrocarbons. | HSDB | ||
| SOL IN CHLORINATED HYDROCARBONS, MINERAL OIL, PEANUT OIL AND SOYA BEAN OIL | HSDB |
Cyclohexylamine vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 11 mmHg | NIOSH | |
| 10.1 mmHg | at 25 °C | HSDB |
Cyclohexylamine flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 31.11 °C (88 °F) | HSDB |
Cyclohexylamine autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 293.33 °C (560 °F) | HSDB | |
| 293 °C (559.4 °F) | ICSC |
Cyclohexylamine lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.5 % by volume | NIOSH |
Cyclohexylamine upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 9.4 % by volume | NIOSH |
Cyclohexylamine vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.42 (air = 1) | HSDB |
Cyclohexylamine odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor Threshold Low: 2.6 [ppm] | Haz-Map | |
| Odor Threshold High: 110.0 [ppm] | Haz-Map | ||
| Odor thresholds from CHEMINFO | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Cyclohexylamine 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.
Cyclohexylamine fire potential
FLAMMABLE LIQUID...
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Cyclohexylamine storage and handling
Cyclohexylamine safe storage
Fireproof. Separated from acids, oxidants, aluminium, copper, zinc and food and feedstuffs. Well closed.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Cyclohexylamine storage conditions
Outside or detached storage is preferred. Avoid oxidizing materials, acid, and sources of halogen. Store in a cool, dry well-ventilated location.
Source: Hazardous Substances Data Bank (HSDB)
Cyclohexylamine incompatible materials
Oxidizers, organic compounds, acid anhydrides, acid chlorides, acids, lead [Note: Corrosive to copper, aluminum, zinc & galvanized steel].
Source: Hazardous Substances Data Bank (HSDB)
Cyclohexylamine reactivity
CYCLOHEXYLAMINE 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 Cyclohexylamine in the storage compatibility matrix →
11 · Transport
Cyclohexylamine 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.
Cyclohexylamine under UN 2357 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| CYCLOHEXYLAMINE | 8 | CF1 | II | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 8 is “Corrosive substances” (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) |
|---|---|---|---|
| Cyclohexylamine | 8 | II | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 8 is “Corrosive material” (49 CFR 173.2).
12 · Questions
Cyclohexylamine — frequently asked questions
What is the CAS number of Cyclohexylamine?
The CAS number of Cyclohexylamine is 108-91-8. Its EC number is 203-629-0.
What does a Cyclohexylamine label have to show?
Under CLP Annex VI the label for Cyclohexylamine carries the pictograms Flame, Corrosion, Health hazard and Exclamation mark and the signal word is Danger.
Is Cyclohexylamine flammable?
Yes. CLP Annex VI assigns Cyclohexylamine H226 — flammable liquid and vapour. The flash point reported for it is 31.11 °C (88 °F) (HSDB).
Is Cyclohexylamine a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Cyclohexylamine. 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 Cyclohexylamine?
The US occupational exposure limit reported for Cyclohexylamine is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). 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 Cyclohexylamine?
The boiling point reported for Cyclohexylamine is 134.5 °C (274.1 °F), at 760 mmHg (HSDB).
What is the melting point of Cyclohexylamine?
The melting point reported for Cyclohexylamine is -17.7 °C (0.1 °F) (HSDB).
How should Cyclohexylamine be stored?
CLP Annex VI assigns Cyclohexylamine the storage statement P403. Outside or detached storage is preferred. Avoid oxidizing materials, acid, and sources of halogen. Store in a cool, dry well-ventilated location. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Cyclohexylamine
Keep going: substances starting with C, or search the whole database by name, CAS number, pictogram or signal word.