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Acid and mordant dyes

Fuchsine acid

Also known as Acid fuchsin, Acidal fuchsine, Acidal magenta

CAS 3244-88-0Formula C20H17N3Na2O9S3Molar mass 585.55 g/molEC 221-816-5
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Fuchsine acid chemical structure, C20H17N3Na2O9S3, CAS 3244-88-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3244-88-0
Formula
C20H17N3Na2O9S3
Molar mass
585.55 g/mol
EC number
221-816-5
HS code
320412
Category
Acid and mordant dyes

What is Fuchsine acid?

Plain description, key identifiers and synonyms

Fuchsine acid is a chemical substance with the molecular formula C20H17N3Na2O9S3 and a molar mass of 585.55 g/mol. Its CAS registry number is 3244-88-0. The IUPAC name is disodium, (3Z)-3-[(4-amino-3-sulfonatophenyl)-(4-amino-3-sulfophenyl)methylidene]-6-imino-5-methylcyclohexa-1,4-diene-1-sulfonate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, (3Z)-3-[(4-amino-3-sulfonatophenyl)-(4-amino-3-sulfophenyl)methylidene]-6-imino-5-methylcyclohexa-1,4-diene-1-sulfonate
CAS number
3244-88-0
EC number
221-816-5
Molecular formula
C20H17N3Na2O9S3
UNII
8RA6L21QTM
InChIKey
WZRZTHMJPHPAMU-UHFFFAOYSA-L
InChI
InChI=1S/C20H19N3O9S3.2Na/c1-10-6-13(9-18(20(10)23)35(30,31)32)19(11-2-4-14(21)16(7-11)33(24,25)26)12-3-5-15(22)17(8-12)34(27,28)29;;/h2-9,23H,21-22H2,1H3,(H,24,25,26)(H,27,28,29)(H,30,31,32);;/q;2*+1/p-2
Canonical SMILES
CC1=CC(=C(c2ccc(N)c(S(=O)(=O)[O-])c2)c2ccc(N)c(S(=O)(=O)O)c2)C=C(S(=O)(=O)[O-])C1=N.[Na+].[Na+]
Isomeric SMILES
CC1=C/C(=C(/C2=CC(=C(C=C2)N)S(=O)(=O)O)\C3=CC(=C(C=C3)N)S(=O)(=O)[O-])/C=C(C1=N)S(=O)(=O)[O-].[Na+].[Na+]

Synonyms

  • Acid fuchsin
  • Acidal fuchsine
  • Acidal magenta
  • Acid fuchsine
  • Acid magenta
  • Fuchsin acid
  • Acid rubin
  • p-Fuchsine acid
  • Acid fuchsine N
  • Acid fuchsine O
  • Acid fuchsine S
  • Kiton magenta A
  • Acid magenta O
  • Acid magenta 0
  • Acid leather magenta A
  • C.I. Acid Violet 19
  • Rubine S
  • C.I. Acid Violet 19, disodium salt
  • Acid rosein
  • Acid violet 19
  • Fuchsin(E) acid
  • Benzenesulfonic acid, 2-amino-5-((4-amino-3-sulfophenyl)(4-imino-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl)-3-methyl-, sodium salt (1:2)
  • Benzenesulfonic acid,2-amino-5-[(4-amino-3-sulfophenyl)(4-imino-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl]-3-methyl-, disodium salt
  • 3-(1-(4-Amino-3-methyl-5-sulphonatophenyl)-1-(4-amino-3-sulphonatophenyl)methylene)cyclohexa-1,4-dienesulphonic acid
  • Benzenesulfonic acid, 2-amino-5-((4-amino-3-sulfophenyl)(4-imino-3-sulfo-2,5-cyclohexadien-1-ylidene)methyl)-3-methyl-, disodium salt
Show all 26 synonyms
  • disodium, (3Z)-3-[(4-amino-3-sulfonatophenyl)-(4-amino-3-sulfophenyl)methylidene]-6-imino-5-methylcyclohexa-1,4-diene-1-sulfonate

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
585.55 g/molcalc.
Exact mass
584.9922 Dacalc.
LogP (octanol/water)
-4.78calc.
Topological polar surface area
244.7 ร…ยฒcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
11calc.
Rotatable bonds
5calc.
Heavy atoms
37calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.05calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Fails (2 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, N=C1C=CC(=C(c2ccccc2)c2ccccc2)C=C1

N=C1C=CC(=C(c2ccccc2)c2ccccc2)C=C1

3 rings, 20 atoms.

94 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Fuchsine acid suppliers

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All 14 suppliers
14 of 14 offers

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

14 suppliers in 3 countries

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Fuchsine acid 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

Industries and functions

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 Fuchsine acid is traded under.

HS 3204.12Indicative HS code

Acid dyes, whether or not premetallised, and preparations based thereon, mordant dyesโ€ฆ

World exports in 2024
$792M
+6.2% vs 2023, imports $791M
2019 to 2024
Top exporters
  1. India * partner reported34.9%
  2. China9.3%
  3. Germany7.4%
Top importers
  1. China15.3%
  2. Italy8.2%
  3. United States7.3%

* Partner reported figures, a lower bound.

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

The HS code shown for Fuchsine acid is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Fuchsine acid?

Fuchsine acid is a chemical substance with the molecular formula C20H17N3Na2O9S3 and a molar mass of 585.55 g/mol. Its CAS registry number is 3244-88-0. The IUPAC name is disodium, (3Z)-3-[(4-amino-3-sulfonatophenyl)-(4-amino-3-sulfophenyl)methylidene]-6-imino-5-methylcyclohexa-1,4-diene-1-sulfonate.

What is the CAS number of Fuchsine acid?

The CAS registry number of Fuchsine acid is 3244-88-0.

What is the molecular formula and weight of Fuchsine acid?

The molecular formula of Fuchsine acid is C20H17N3Na2O9S3 and its molar mass is 585.55 g/mol.

What is Fuchsine acid used for?

Known uses and roles of Fuchsine acid include textile dyes in textiles and leather.

Is Fuchsine acid hazardous?

No GHS hazard classification for Fuchsine acid is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Fuchsine acid?

Fuchsine acid is usually classified under HS code 320412 (Acid dyes, whether or not premetallised, and preparations based thereon, mordant dyesโ€ฆ). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fuchsine acid?

CompoundList lists 14 suppliers of Fuchsine acid in India, Egypt 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 Fuchsine acid in India?

8 suppliers in India list Fuchsine 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 Fuchsine acid?

Suppliers quote Fuchsine 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

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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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