CompoundList
Sign in
Dye intermediates

Croceic acid

Also known as Bayer's Acid, 1-Naphthalenesulfonic acid, 7-hydroxy-, 7-hydroxy-1-naphthalenesulfonic acid

CAS 132-57-0Formula C10H8O4SMolar mass 224.24 g/molEC 205-066-6
GHS signal word: Warning. Pictograms: Harmful or irritant
Get quotes Safety data
Croceic acid chemical structure, C10H8O4S, CAS 132-57-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
132-57-0
Formula
C10H8O4S
Molar mass
224.24 g/mol
EC number
205-066-6
HS code
290899
Category
Dye intermediates

What is Croceic acid?

Plain description, key identifiers and synonyms

Croceic acid is a chemical substance with the molecular formula C10H8O4S and a molar mass of 224.24 g/mol. Its CAS registry number is 132-57-0. The IUPAC name is 7-hydroxynaphthalene-1-sulfonic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
7-hydroxynaphthalene-1-sulfonic acid
CAS number
132-57-0 CAS number cross-checked
EC number
205-066-6
Molecular formula
C10H8O4S
UNII
M1490B3Z3G
InChIKey
HUYJTJXLNBOVFO-UHFFFAOYSA-N
InChI
InChI=1S/C10H8O4S/c11-8-5-4-7-2-1-3-10(9(7)6-8)15(12,13)14/h1-6,11H,(H,12,13,14)
SMILES (canonical and isomeric)
C1=CC2=C(C=C(C=C2)O)C(=C1)S(=O)(=O)O

Synonyms

  • Bayer's Acid
  • 1-Naphthalenesulfonic acid, 7-hydroxy-
  • 7-hydroxy-1-naphthalenesulfonic acid
  • 7-hydroxy-1-naphthalenesulphonic acid
  • 7-HNS acid
  • 7-hydroxynaphthalene-1-sulfonic acid
  • 7-Hydroxynaphthalene-1-sulphonic acid
  • 2-naphthol-8-sulfonic acid
  • Croceine acid
  • Crocein acid
  • 2-Naphthol-8-sulfosaure
  • 2-Hydroxy-8-naphthalenesulfonic acid

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
224.24 g/molcalc.
Exact mass
224.0143 Dacalc.
LogP (octanol/water)
1.79calc.
Topological polar surface area
74.6 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
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.

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

Croceic acid suppliers

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

No supplier listings yet

Post one free request and suppliers who make or trade Croceic acid can send you quotes. Your contact details stay private until you accept a quote.

Request quotesSell this chemical

Croceic acid price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

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: Inactive 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 Croceic acid is traded under.

HS 2908.99Indicative HS code

Halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or…

World exports in 2024
$77.7M
+4.6% vs 2023, imports $83.7M
2019 to 2024
Top exporters
  1. China32.2%
  2. India * partner reported22.2%
  3. Spain8.5%
Top importers
  1. United States13.9%
  2. Spain10.6%
  3. Turkey8.3%

* Partner reported figures, a lower bound.

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

The HS code shown for Croceic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Croceic acid, based on the data on this page

What is Croceic acid?

Croceic acid is a chemical substance with the molecular formula C10H8O4S and a molar mass of 224.24 g/mol. Its CAS registry number is 132-57-0. The IUPAC name is 7-hydroxynaphthalene-1-sulfonic acid.

What is the CAS number of Croceic acid?

The CAS registry number of Croceic acid is 132-57-0.

What is the molecular formula and weight of Croceic acid?

The molecular formula of Croceic acid is C10H8O4S and its molar mass is 224.24 g/mol.

Is Croceic acid hazardous?

Croceic acid carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Croceic acid?

Croceic acid is usually classified under HS code 290899 (Halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Croceic acid?

Post a free request on CompoundList and suppliers of Croceic acid will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Croceic acid?

Suppliers quote Croceic 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 Croceic acid

Get quotes for Croceic acid

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Croceic acid
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Croceic acid with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/croceic-acid-132-57-0" title="Croceic acid structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Dye intermediates or HS code 290899

Price on request
Free quotes, contact stays private
Get quotes