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Pharmaceutical intermediates

1-Naphthylamine

Also known as 1-Aminonaphthalene, naphthalen-1-amine, 1-Naphthalenamine

CAS 134-32-7Formula C10H9NMolar mass 143.19 g/molEC 205-138-7
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 81 suppliers listed
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1-Naphthylamine chemical structure, C10H9N, CAS 134-32-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Needles from ethanol (aq) or ether
Melting point
49.2 °C
Boiling point
300.7 °C
Density
1.114 g/cm³
Flash point
157 °C
HS code
292145
Category
Pharmaceutical intermediates
UN number
UN 2077
Illustrative photo, closed blue fibre drums on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 1-Naphthylamine?

Plain description, key identifiers and synonyms

1-naphthylamine is a naphthylamine that is naphthalene substituted by an amino group at position 1. It has a role as a human xenobiotic metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
naphthalen-1-amine
CAS number
134-32-7 CAS number cross-checkedOther or deprecated CAS: 25168-10-9, 53162-00-8
EC number
205-138-7
Molecular formula
C10H9N
UNII
9753I242R5
MDL number
MFCD00004016
InChIKey
RUFPHBVGCFYCNW-UHFFFAOYSA-N
InChI
InChI=1S/C10H9N/c11-10-7-3-5-8-4-1-2-6-9(8)10/h1-7H,11H2
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C=CC=C2N

Synonyms

  • 1-Aminonaphthalene
  • naphthalen-1-amine
  • 1-Naphthalenamine
  • alpha-Naphthylamine
  • Naphthalidine
  • Naphthalen-1-ylamine
  • Fast Garnet Base B
  • Naphthalidam
  • 1-Naphthalamine
  • 1-Naphthylamin
  • 1-Naftilamina
  • alpha-Aminonaphthalene
  • Alfanaftilamina
  • Fast Garnet B Base
  • 1-Aminonaftalen
  • 1-Naftylamine
  • 1-Naftylamin
  • Alfa-naftyloamina
  • RCRA waste number U167
  • alpha-Naftalamin
  • alpha-Naftylamin
  • C.I. Azoic Diazo Component 114
  • CI Azoic Diazo Component 114
  • CI 37265
  • C.I. 37265
Show all 34 synonyms
  • alpha Naphthylamine
  • 1 Naphthylamine
  • 1 Aminonaphthalene
  • 8 Aminonaphthalene
  • 8-Aminonaphthalene
  • Naphthalenamine
  • Naphthalene, 1-amino-
  • Naphthaleneamine
  • 1-Naphthylamine, analytical standard

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
Needles from ethanol (aq) or etherexp.
Odour
Ammonia-like odor.exp.
Melting point
49.2 °Cexp.
Boiling point
300.7 °Cexp.
Density
1.114 g/cm³exp.
Flash point
157 °Cexp.
Autoignition temperature
460 °Cexp.
Solubility
Crystal powder, becomes bluish on exposure to air and light. Sol in about 27 parts water, sol in alcohol and ether /Hydrochloride/exp.
Vapour pressure
4.18 × 10⁻³ mm Hg @ 25 °C /Extrapolated/exp.

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
143.19 g/molcalc.
Exact mass
143.0735 Dacalc.
LogP (octanol/water)
2.42calc.
Topological polar surface area
26.02 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc2ccccc2c1

c1ccc2ccccc2c1

2 rings, 10 atoms, the Naphthalene ring system.

17,920 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment
120NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2077
Transport hazard class
6.1
Packing group
III

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

1-Naphthylamine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 81 suppliers
30 of 30 offers

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Where suppliers are based

81 suppliers in 18 countries

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1-Naphthylamine 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

Toning prints made with cerium salts.

Chemical intermediate for dyes, eg, azoic diazo component, chemical intermediate for azo dye coupling agents, for n-1-naphthylphthalmic acid herbicide, for n-phenyl-1-naphthylamine rubber antioxidant, for an imidazoline adrenergic agent, chemical intermediate for 1-naphthylthiourea rodenticide and for a fluoroacetamide miticide. (SRP60: Former).

1-Naphthylamine is used as an intermediate in the synthesis of dyes, antioxidants, herbicides, some drugs, and other chemicals. (SRP60: Former).

In agricultural chemicals.

Pharmacological actions

  • Carcinogens

Roles

  • animal metabolite
  • eukaryotic metabolite
  • human metabolite
  • human xenobiotic metabolite
  • mammalian metabolite
  • metabolite
  • xenobiotic metabolite

How it is made

Reduction of 1-nitronaphthalene by catalytic hydrogenation with a nickel catalyst...

Prepared by reducing alpha-nitronaphthalene with iron and hydrochloric acid.

Naphthalene is nitrated with H2SO4-HNO3 at 50-60 °C. The crude product (mp 52 °C) is separated, washed with hot water, and further purified by crystallization or sweating (draining of the lower melting point isomer) to remove 2-nitronaphthalene (3%) and traces of 2,4-dinitronaphthalene. purified 1-nitronaphthalene was traditionally reduced with iron in boiling dilute hydrochloric acid, but modern plants use hydrogenation with nickel catalyst. The 1-naphthylamine produced is further purified by distillation under vacuum. The content of 2-naphthylamine in the commercial product is specified at less than 10 ppm.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-020-00-2

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 1-Naphthylamine is traded under.

HS 2921.45Exact HS code

1-Naphthylamine (α-naphthylamine), 2-naphthylamine (β-naphthylamine) and their…

World exports in 2024
$58.2M
+12.9% vs 2023, imports $75.3M
2019 to 2024
Top exporters
  1. China61.3%
  2. India * partner reported25.6%
  3. United States5.8%
Top importers
  1. India * partner reported31.1%
  2. Japan15.8%
  3. South Korea13.5%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 1-Naphthylamine 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 1-Naphthylamine, based on the data on this page

What is 1-Naphthylamine?

1-naphthylamine is a naphthylamine that is naphthalene substituted by an amino group at position 1. It has a role as a human xenobiotic metabolite.

What is the CAS number of 1-Naphthylamine?

The CAS registry number of 1-Naphthylamine is 134-32-7. Other or deprecated CAS numbers: 25168-10-9, 53162-00-8.

What is the molecular formula and weight of 1-Naphthylamine?

The molecular formula of 1-Naphthylamine is C10H9N and its molar mass is 143.19 g/mol.

What is 1-Naphthylamine used for?

Toning prints made with cerium salts. Chemical intermediate for dyes, eg, azoic diazo component, chemical intermediate for azo dye coupling agents, for n-1-naphthylphthalmic acid herbicide, for n-phenyl-1-naphthylamine rubber antioxidant, for an imidazoline adrenergic agent, chemical intermediate for 1-naphthylthioure…

Is 1-Naphthylamine hazardous?

1-Naphthylamine carries the GHS signal word "Warning". Main hazards: harmful if swallowed, toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1-Naphthylamine?

1-Naphthylamine is usually classified under HS code 292145 (1-Naphthylamine (α-naphthylamine), 2-naphthylamine (β-naphthylamine) and their…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 1-Naphthylamine?

CompoundList lists 81 suppliers of 1-Naphthylamine in China, United States, India, United Kingdom and 14 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 1-Naphthylamine in India?

9 suppliers in India list 1-Naphthylamine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 1-Naphthylamine?

Suppliers quote 1-Naphthylamine 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 1-Naphthylamine

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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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