Substance profile
1-Naphthylamine
1-Naphthylamine is needles from ethanol (aq) or ether with an ammonia-like odor.
01 · Identification
What 1-Naphthylamine is
1-Naphthylamine is needles from ethanol (aq) or ether with an ammonia-like odor. Its molecular formula is C10H9N and its molecular weight is 143.18 g/mol. It boils at 301 °C, melts at 49.2 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
1-Naphthylamine identifiers and molecular data
1-Naphthylamine CAS number and EC number
1-Naphthylamine molecular formula and molecular weight
03 · GHS classification
1-Naphthylamine hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
1-Naphthylamine pictograms and signal word
1-Naphthylamine hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | GHS09 |
1-Naphthylamine hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to 1-Naphthylamine. 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 1-Naphthylamine
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 1-Naphthylamine 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
1-Naphthylamine precautionary statements
CLP Annex VI assigns 7 precautionary statements to 1-Naphthylamine. 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.
Disposal
What has to happen to the contents and the empty container.
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
1-Naphthylamine 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 | 1-нафтиламин |
| Spanish español | 1-Naftilamina |
| Czech čeština | 1-naftylamin |
| Danish dansk | 1-naphthylamin |
| German Deutsch | 1-Naphthylamin α-Naphthylamin |
| Estonian eesti | 1-naftüülamiin |
| Greek ελληνικά | 1-ναφθυλαμίνη |
| English English | 1-naphthylamine |
| French français | 1-naphtylamine |
| Croatian hrvatski | 1-naftilamin |
| Italian italiano | 1-naftilamina |
| Latvian latviešu | 1-naftilamīns |
| Lithuanian lietuvių | 1-naftilaminas |
| Hungarian magyar | 1-naftilamin |
| Maltese Malti | 1-naftilammina |
| Dutch Nederlands | 1-naftylamine |
| Polish polski | 1-naftyloamina |
| Portuguese português | 1-naftilamina |
| Romanian română | 1-naftilamină |
| Slovak slovenčina | 1-naftylamín |
| Slovenian slovenščina | 1-naftilamin |
| Finnish suomi | 1-naftyyliamiini |
| Swedish svenska | 1-naftylamin |
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
1-Naphthylamine GHS label elements
Everything CLP Annex VI fixes for 1-Naphthylamine, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
1-Naphthylamine
- Harmful if swallowed.
- Toxic to aquatic life with long lasting effects.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- IF SWALLOWED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 1-Naphthylamine in the GHS label constructor →
07 · Health hazards
1-Naphthylamine health hazards and exposure limits
1-Naphthylamine hazard summary
It is an OSHA regulated carcinogen. It can induce methemoglobinemia in feeding studies in dogs. [HSDB] beta-Naphthylamine is a Group 1 bladder carcinogen. [IARC] See beta-Naphthylamine.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
1-Naphthylamine carcinogenicity classification
Inadequate evidence of carcinogenicity in humans. Inadequate evidence of carcinogenicity in animals. OVERALL EVALUATION: Group 3: The agent is not classifiable as to its carcinogenicity to humans.
Source: Hazardous Substances Data Bank (HSDB)
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.
1-Naphthylamine occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | Ca | Occupational Safety and Health Administration (OSHA) |
| PEL | [1910.1004] See Appendix B | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | Ca See Appendix A | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | A potential occupational carcinogen. (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | NIOSH considers alpha-naphthylamine to be a potential occupational carcinogen. | Hazardous Substances Data Bank (HSDB) |
| IDLH | Ca [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
1-Naphthylamine 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.
1-Naphthylamine boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 300.7 °C (573.3 °F) | HSDB | |
| 300.56 °C (573 °F) | NIOSH | ||
| 301.11 °C (574 °F) | at 760 mmHg | CAMEO |
1-Naphthylamine melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 49.2 °C (120.6 °F) | HSDB | |
| 50 °C (122 °F) | NIOSH |
1-Naphthylamine density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.114 g/cm³ | HSDB | |
| 1.12 g/cm³ | NIOSH | ||
| 1.12 g/cm³ | at 25 °C | CAMEO |
1-Naphthylamine solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Crystal powder; becomes bluish on exposure to air and light. Sol in about 27 parts water; sol in alcohol and ether | Hydrochloride | HSDB |
| Sol in chloroform | HSDB | ||
| Freely sol in alcohol and ether | HSDB |
1-Naphthylamine vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.004 mmHg | at 20 °C | ICSC |
| 0.0042 mmHg | at 25 °C | HSDB | |
| 1 mmHg | at 104.44 °C | NIOSH |
1-Naphthylamine flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 157 °C (314.6 °F) | closed cup | HSDB |
| 157.22 °C (315 °F) | NIOSH |
1-Naphthylamine autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 460 °C (860 °F) | HSDB | |
| 485 °C (905 °F) | CAMEO |
1-Naphthylamine lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible Solid | NIOSH |
1-Naphthylamine vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.93 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
1-Naphthylamine storage and handling
1-Naphthylamine safe storage
Dry. Keep in the dark. Well closed.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
1-Naphthylamine storage conditions
Keep well closed and protected from light.
Source: Hazardous Substances Data Bank (HSDB)
1-Naphthylamine incompatible materials
Oxidizes in air.
Source: Hazardous Substances Data Bank (HSDB)
1-Naphthylamine reactivity
ALPHA-NAPHTHYLAMINE is incompatible with oxidizing agents. It is also incompatible with nitrous acid. It reduces warm ammoniacal silver nitrate. (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1-Naphthylamine in the storage compatibility matrix →
10 · Questions
1-Naphthylamine — frequently asked questions
What is the CAS number of 1-Naphthylamine?
The CAS number of 1-Naphthylamine is 134-32-7. Its EC number is 205-138-7.
What is the chemical formula of 1-Naphthylamine?
The molecular formula of 1-Naphthylamine is C10H9N and its molecular weight is 143.18 g/mol.
What does a 1-Naphthylamine label have to show?
Under CLP Annex VI the label for 1-Naphthylamine carries the pictograms Exclamation mark and Environment and the signal word is Warning.
Is 1-Naphthylamine flammable?
CLP Annex VI assigns 1-Naphthylamine no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it. The flash point reported for it is 157 °C (314.6 °F), closed cup (HSDB).
Is 1-Naphthylamine a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 1-Naphthylamine. 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. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the exposure limit for 1-Naphthylamine?
The US occupational exposure limit reported for 1-Naphthylamine is Ca (Occupational Safety and Health Administration (OSHA)). 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 1-Naphthylamine?
The boiling point reported for 1-Naphthylamine is 300.7 °C (573.3 °F) (HSDB).
What is the melting point of 1-Naphthylamine?
The melting point reported for 1-Naphthylamine is 49.2 °C (120.6 °F) (HSDB).
How should 1-Naphthylamine be stored?
Keep well closed and protected from light. (Hazardous Substances Data Bank (HSDB))
Nearby
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