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Acid and mordant dyes

Azorubine

Also known as Carmoisine, Azo Rubine, Chromotrope FB

CAS 3567-69-9Formula C20H12N2Na2O7S2Molar mass 502.44 g/molEC 222-657-4
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Azorubine chemical structure, C20H12N2Na2O7S2, CAS 3567-69-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3567-69-9
Formula
C20H12N2Na2O7S2
Molar mass
502.44 g/mol
EC number
222-657-4
HS code
320412
Category
Acid and mordant dyes

What is Azorubine?

Plain description, key identifiers and synonyms

Carmoisine is an organic molecular entity.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate
CAS number
3567-69-9 CAS number cross-checked
EC number
222-657-4
Molecular formula
C20H12N2Na2O7S2
UNII
DR4641L47F
MDL number
MFCD00003978
INCI name
ACID RED 14, CI 14720
InChIKey
YSVBPNGJESBVRM-UHFFFAOYSA-L
InChI
InChI=1S/C20H14N2O7S2.2Na/c23-20-15-8-4-3-7-14(15)19(31(27,28)29)11-17(20)22-21-16-9-10-18(30(24,25)26)13-6-2-1-5-12(13)16;;/h1-11,23H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C4=CC=CC=C4C(=C3)S(=O)(=O)[O-])O.[Na+].[Na+]

Synonyms

  • Carmoisine
  • Azo Rubine
  • Chromotrope FB
  • Acid red 14
  • C.I. Acid Red 14
  • Azorubin
  • Acid Rubine
  • C.I. Food Red 3
  • C.I. 14720
  • Karmesin
  • Nacarat
  • Brilliant Crimson Red
  • Food Red 3
  • Carmoisine bss
  • Carmoisine ba
  • Carmoisine fu
  • Carmoisine ws
  • Carmoisine S
  • Carmoisine supra
  • Carmoisine W
  • Solar Rubine
  • Chromotrop FB
  • HD Carmoisine
  • Azo rubine af
  • Azorubin (E122)
Show all 38 synonyms
  • Carmoisine GRN
  • Carmoisine LAS
  • Azo Rubin Extra
  • Cilefa Rubine R
  • Acetacid Red B
  • Kiton Rubine R
  • Crimson EMBL
  • Erio Rubine B
  • Java Rubine N
  • Nacarat A Export
  • Azo rubin XX
  • Eurocert Azorubine
  • Fenazo Red C

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
502.44 g/molcalc.
Exact mass
501.9881 Dacalc.
LogP (octanol/water)
-2.07calc.
Topological polar surface area
159.4 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
9calc.
Rotatable bonds
4calc.
Heavy atoms
33calc.
Rings
4calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Passes (1 violation)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, c1ccc2cc(N=Nc3cccc4ccccc34)ccc2c1

c1ccc2cc(N=Nc3cccc4ccccc34)ccc2c1

4 rings, 22 atoms, the Diazene, 1-naphthalenyl-2-naphthalenyl- ring system.

119 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.

Azorubine suppliers

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

All 83 suppliers
30 of 30 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

83 suppliers in 13 countries

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Azorubine 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.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Cosmetics.

Cosmetic ingredient, INCI name ACID RED 14(colorant)

Functional uses

  • Dye
  • Fragrance

Cosmetic functions

  • Colorant

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex IV, allowed colourant
    Name: CI 14720, Ref no: 19, Annex ref: IV/19

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 Azorubine is traded under.

HS 3204.12Indicative HS code

Acid dyes, whether or not premetallised, and preparations based thereon, mordant dyes…

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 Azorubine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Azorubine, based on the data on this page

What is Azorubine?

Carmoisine is an organic molecular entity.

What is the CAS number of Azorubine?

The CAS registry number of Azorubine is 3567-69-9.

What is the molecular formula and weight of Azorubine?

The molecular formula of Azorubine is C20H12N2Na2O7S2 and its molar mass is 502.44 g/mol.

What is Azorubine used for?

Use classes: Cosmetics.

Is Azorubine hazardous?

No GHS hazard classification for Azorubine 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 Azorubine?

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

Where can I buy Azorubine?

CompoundList lists 83 suppliers of Azorubine in India, China, Thailand, Turkey and 9 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Azorubine in India?

49 suppliers in India list Azorubine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Azorubine?

Suppliers quote Azorubine 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 Azorubine

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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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