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Dyes and pigments

Rufianic acid

Also known as 1,4-Dihydroxyanthraquinone-2-sulfonic acid, Helio Fast Rubine 4BLA, 2-Quinizarinsulfonic acid

CAS 145-48-2Formula C14H8O7SMolar mass 320.28 g/molEC 205-654-2
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Rufianic acid chemical structure, C14H8O7S, CAS 145-48-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
145-48-2
Formula
C14H8O7S
Molar mass
320.28 g/mol
EC number
205-654-2
HS code
291479
Category
Dyes and pigments

What is Rufianic acid?

Plain description, key identifiers and synonyms

Rufianic acid is a chemical substance with the molecular formula C14H8O7S and a molar mass of 320.28 g/mol. Its CAS registry number is 145-48-2. The IUPAC name is 1,4-dihydroxy-9,10-dioxoanthracene-2-sulfonic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,4-dihydroxy-9,10-dioxoanthracene-2-sulfonic acid
CAS number
145-48-2 CAS number cross-checked
EC number
205-654-2
Molecular formula
C14H8O7S
UNII
3SF26I984L
InChIKey
CCQSBGJULPBARL-UHFFFAOYSA-N
InChI
InChI=1S/C14H8O7S/c15-8-5-9(22(19,20)21)14(18)11-10(8)12(16)6-3-1-2-4-7(6)13(11)17/h1-5,15,18H,(H,19,20,21)
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)C3=C(C2=O)C(=C(C=C3O)S(=O)(=O)O)O

Synonyms

  • 1,4-Dihydroxyanthraquinone-2-sulfonic acid
  • Helio Fast Rubine 4BLA
  • 2-Quinizarinsulfonic acid
  • Quinizarinsulfonic acid
  • Morocco Maroon X-1550
  • Quinizarin-3-sulfonic acid
  • Quinizarin-3-sulphonic acid
  • 2-Anthracenesulfonic acid, 9,10-dihydro-1,4-dihydroxy-9,10-dioxo-
  • C.I. 58055
  • Anthracenesulfonic acid, 9,10-dihydro-1,4-dihydroxy-9,10-dioxo-
  • 1,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid
  • 1,4-dihydroxy-9,10-dioxoanthracene-2-sulfonic acid
  • Rufiansaure
  • 9,10-Dihydro-1,4-dihydroxy-9,10-dioxoanthracene-2-sulphonic acid
  • Quinizarin-2-sulfonic acid
  • 1,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonicacid
  • 2-Anthracenesulfonic acid,10-dihydro-1,4-dihydroxy-9,10-dioxo-

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
320.28 g/molcalc.
Exact mass
319.9991 Dacalc.
LogP (octanol/water)
1.12calc.
Topological polar surface area
129 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
1calc.
Heavy atoms
22calc.
Rings
3calc.
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, O=C1c2ccccc2C(=O)c2ccccc21

O=C1c2ccccc2C(=O)c2ccccc21

3 rings, 16 atoms, the Anthraquinone ring system.

2,059 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.

Rufianic acid suppliers

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Rufianic 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

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 Rufianic acid is traded under.

HS 2914.79Indicative HS code

Halogenated, sulphonated, nitrated or nitrosated derivatives, other

World exports in 2024
$558M
−12.1% vs 2023, imports $608M
2019 to 2024
Top exporters
  1. China41.2%
  2. India * partner reported28.7%
  3. Germany16.7%
Top importers
  1. United States29.1%
  2. Italy9.9%
  3. Switzerland * partner reported8.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Rufianic acid?

Rufianic acid is a chemical substance with the molecular formula C14H8O7S and a molar mass of 320.28 g/mol. Its CAS registry number is 145-48-2. The IUPAC name is 1,4-dihydroxy-9,10-dioxoanthracene-2-sulfonic acid.

What is the CAS number of Rufianic acid?

The CAS registry number of Rufianic acid is 145-48-2.

What is the molecular formula and weight of Rufianic acid?

The molecular formula of Rufianic acid is C14H8O7S and its molar mass is 320.28 g/mol.

Is Rufianic acid hazardous?

No GHS hazard classification for Rufianic 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 Rufianic acid?

Rufianic acid is usually classified under HS code 291479 (Halogenated, sulphonated, nitrated or nitrosated derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Rufianic acid?

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

What is the price of Rufianic acid?

Suppliers quote Rufianic 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 Rufianic 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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