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Dye intermediates

Cleve's acid

Also known as 8-Aminonaphthalene-2-sulfonic acid, 8-Amino-2-naphthalenesulfonic acid, 1-Naphthylamine-7-sulfonic acid

CAS 119-28-8Formula C10H9NO3SMolar mass 223.25 g/molEC 204-311-4
GHS signal word: Danger. Pictograms: Corrosive 12 suppliers listed
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Cleve's acid chemical structure, C10H9NO3S, CAS 119-28-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
119-28-8
Formula
C10H9NO3S
Molar mass
223.25 g/mol
EC number
204-311-4
HS code
292145
Category
Dye intermediates

What is Cleve's acid?

Plain description, key identifiers and synonyms

Cleve's acid is a chemical substance with the molecular formula C10H9NO3S and a molar mass of 223.25 g/mol. Its CAS registry number is 119-28-8. The IUPAC name is 8-aminonaphthalene-2-sulfonic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
8-aminonaphthalene-2-sulfonic acid
CAS number
119-28-8 CAS number cross-checked
EC number
204-311-4
Molecular formula
C10H9NO3S
UNII
21QEG50798
MDL number
MFCD00004032
InChIKey
QEZZCWMQXHXAFG-UHFFFAOYSA-N
InChI
InChI=1S/C10H9NO3S/c11-10-3-1-2-7-4-5-8(6-9(7)10)15(12,13)14/h1-6H,11H2,(H,12,13,14)
SMILES (canonical and isomeric)
C1=CC2=C(C=C(C=C2)S(=O)(=O)O)C(=C1)N

Synonyms

  • 8-Aminonaphthalene-2-sulfonic acid
  • 8-Amino-2-naphthalenesulfonic acid
  • 1-Naphthylamine-7-sulfonic acid
  • 1,7-Cleve's acid
  • 2-Naphthalenesulfonic acid, 8-amino-
  • 1-Amino-7-sulfonaphthalene
  • 1-Amino-7-naphthalenesulfonic acid
  • 1-Aminonaphthalene-7-sulfonic acid
  • 8-Naphthylamine-2-sulfonic acid
  • Cleve's theta-acid
  • C.I. 26135
  • 1-amino-naphthalene-7-sulphonic acid
  • 1-aminonaphthalene-7-sulphonic acid
  • 1-naphthylamine-7-sulfonic
  • 1-Naphthylamino-7-sulfonic acid
  • 8-amino-2-naphthalenesulphonic acid
  • 8-Amino-2-naphthalenesulfonic Acid, 1-Naphthylamine-7-sulfonic Acid, 1-Amino-7-sulfonaphthalene, 1,7-Cleve's Acid,
  • 8-Aminonaphthalene-2-sulphonic acid
  • 1-Amino-7-
  • 8-Amino-2-naphthalenesulfonicacid
  • alpha-Naphthylamine 7-sulfonic acid
  • 8-Amino-2-naphthalene-sulfonic acid
  • 8-Amino-2-naphthalenesulfonic acid, >=97%

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
223.25 g/molcalc.
Exact mass
223.0303 Dacalc.
LogP (octanol/water)
1.67calc.
Topological polar surface area
80.39 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
15calc.
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
Danger
GHS05: Corrosive
Corrosive

Hazard statements

  • H314Causes severe skin burns and eye damage.
Precautionary statements (12)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Cleve's acid suppliers

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All 12 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

12 suppliers in 3 countries

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Cleve's acid price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Cleve's acid is traded under.

HS 2921.45Indicative 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 Cleve's acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Cleve's acid, based on the data on this page

What is Cleve's acid?

Cleve's acid is a chemical substance with the molecular formula C10H9NO3S and a molar mass of 223.25 g/mol. Its CAS registry number is 119-28-8. The IUPAC name is 8-aminonaphthalene-2-sulfonic acid.

What is the CAS number of Cleve's acid?

The CAS registry number of Cleve's acid is 119-28-8.

What is the molecular formula and weight of Cleve's acid?

The molecular formula of Cleve's acid is C10H9NO3S and its molar mass is 223.25 g/mol.

Is Cleve's acid hazardous?

Cleve's acid carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Cleve's acid?

Cleve's acid 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 Cleve's acid?

CompoundList lists 12 suppliers of Cleve's acid in India, China and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cleve's acid in India?

10 suppliers in India list Cleve's acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cleve's acid?

Suppliers quote Cleve's acid 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 Cleve's acid

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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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