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Dyes and pigments

FD&C Red 4

Also known as Ponceau SX, C.I. Food Red 1, Food red 1

CAS 4548-53-2Formula C18H14N2Na2O7S2Molar mass 480.43 g/molEC 224-909-9
3 suppliers listed
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FD&C Red 4 chemical structure, C18H14N2Na2O7S2, CAS 4548-53-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
4548-53-2
Formula
C18H14N2Na2O7S2
Molar mass
480.43 g/mol
EC number
224-909-9
HS code
292700
Category
Dyes and pigments

What is FD&C Red 4?

Plain description, key identifiers and synonyms

FD&C Red 4 is a chemical substance with the molecular formula C18H14N2Na2O7S2 and a molar mass of 480.43 g/mol. Its CAS registry number is 4548-53-2. The IUPAC name is disodium, 3-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-4-hydroxynaphthalene-1-sulfonate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 3-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-4-hydroxynaphthalene-1-sulfonate
CAS number
4548-53-2 CAS number cross-checked
EC number
224-909-9
Molecular formula
C18H14N2Na2O7S2
UNII
X3W0AM1JLX
MDL number
MFCD00046402
INCI name
CI 14700, PONCEAU SX
InChIKey
ONTQJDKFANPPKK-UHFFFAOYSA-L
InChI
InChI=1S/C18H16N2O7S2.2Na/c1-10-7-11(2)16(28(22,23)24)8-14(10)19-20-15-9-17(29(25,26)27)12-5-3-4-6-13(12)18(15)21;;/h3-9,21H,1-2H3,(H,22,23,24)(H,25,26,27);;/q;2*+1/p-2
SMILES (canonical and isomeric)
CC1=CC(=C(C=C1N=NC2=C(C3=CC=CC=C3C(=C2)S(=O)(=O)[O-])O)S(=O)(=O)[O-])C.[Na+].[Na+]

Synonyms

  • Ponceau SX
  • C.I. Food Red 1
  • Food red 1
  • Crimson 4R
  • FD&C Red No. 4
  • FD & C Red no. 4
  • C.I. Food Red 1, disodium salt
  • CI 14700
  • FD and C Red No. 4
  • C.I. 14700
  • 1-Naphthalenesulfonic acid, 3-((2,4-dimethyl-5-sulfophenyl)azo)-4-hydroxy-, disodium salt
  • 3-((2,4-Dimethyl-5-sulfophenyl)azo)-4-hydroxy-1-naphthalenesulfonic acid, disodium salt
  • disodium, 3-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-4-hydroxynaphthalene-1-sulfonate
  • Red 4
  • Ponceau SX Lake
  • 4R purple
  • Maple Ponceau SX
  • 1-Naphthalenesulfonic acid, 4-hydroxy-3-((6-sulfo-2,4-xylyl)azo)-, disodium salt
  • Disodium 3-((2,4-dimethyl-5-sulphonatophenyl)azo)-4-hydroxynaphthalene-1-sulphonate
  • Purple 4R
  • Hexacol Ponceau SX
  • Red shade #24
  • Certicol Ponceau SXS
  • Usacert Red No. 4
  • Dye FD & C Red No. 4
Show all 37 synonyms
  • Red No. 1
  • Red No. 4
  • Edicol Supra Ponceau SX
  • Red Lake 89865N
  • 1-Naphthalenesulfonic acid, 3-(2-(2,4-dimethyl-5-sulfophenyl)diazenyl)-4-hydroxy-, sodium salt (1:2)
  • Dye FD and C Red No. 4
  • 1306 Red
  • D&C RED NO. 4
  • 12101 Red
  • Cerven potravinarska 1
  • Usacert FD & C Red No. 4
  • FD&C Red No. 4 - Aluminium Lake

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
480.43 g/molcalc.
Exact mass
480.0038 Dacalc.
LogP (octanol/water)
-2.61calc.
Topological polar surface area
159.4 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
9calc.
Rotatable bonds
4calc.
Heavy atoms
31calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.11calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
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, c1ccc(N=Nc2ccc3ccccc3c2)cc1

c1ccc(N=Nc2ccc3ccccc3c2)cc1

3 rings, 18 atoms, the Diazene, 2-naphthalenylphenyl- ring system.

600 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.

FD&C Red 4 suppliers

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

All 3 suppliers
  • AmXpress
    Hong KongUnclaimed profile
    Ponceau SXGrade, purity and minimum order on request
    Price on request
    View
  • Polaris Organics
    India ManufacturerUnclaimed profile
    FD&C Red 4Grade, purity and minimum order on request
    Price on request
    View
  • Shanghai Zzbio
    China, ShanghaiUnclaimed profile
    FD&C Red 4Grade, purity and minimum order on request
    Price on request
    View

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

3 suppliers in 3 countries

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FD&C Red 4 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

Use classes: Cosmetics.

Cosmetic ingredient, INCI name CI 14700(colorant)

Functional uses

  • Dye
  • Fragrance

Cosmetic functions

  • Colorant
  • Hair dyeing

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Disodium 3-[(2,4-dimethyl-5-sulphonatophenyl)azo]-4-hydroxynaphthalene-1-sulphonate (Ponceaux SX, CI 14700) when used as a substance in hair dye products…
  • EU Cosmetics Regulation Annex IV, allowed colourant
    Name: PONCEAUX SX (CI 14700), Ref no: 18, Annex ref: IV/18

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 FD&C Red 4 is traded under.

HS 2927.00Indicative HS code

Diazo-, azo- or azoxy compounds

World exports in 2024
$571M
+6.1% vs 2023, imports $525M
2019 to 2024
Top exporters
  1. China47.0%
  2. Indonesia13.1%
  3. Japan9.3%
Top importers
  1. United States10.2%
  2. India * partner reported9.1%
  3. South Korea9.1%

* Partner reported figures, a lower bound.

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

The HS code shown for FD&C Red 4 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about FD&C Red 4, based on the data on this page

What is FD&C Red 4?

FD&C Red 4 is a chemical substance with the molecular formula C18H14N2Na2O7S2 and a molar mass of 480.43 g/mol. Its CAS registry number is 4548-53-2. The IUPAC name is disodium, 3-[(2,4-dimethyl-5-sulfonatophenyl)diazenyl]-4-hydroxynaphthalene-1-sulfonate.

What is the CAS number of FD&C Red 4?

The CAS registry number of FD&C Red 4 is 4548-53-2.

What is the molecular formula and weight of FD&C Red 4?

The molecular formula of FD&C Red 4 is C18H14N2Na2O7S2 and its molar mass is 480.43 g/mol.

What is FD&C Red 4 used for?

Use classes: Cosmetics.

Is FD&C Red 4 hazardous?

No GHS hazard classification for FD&C Red 4 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 FD&C Red 4?

FD&C Red 4 is usually classified under HS code 292700 (Diazo-, azo- or azoxy-compounds). This is indicative, confirm it with your customs broker before shipping.

Where can I buy FD&C Red 4?

CompoundList lists 3 suppliers of FD&C Red 4 in China, Hong Kong and India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy FD&C Red 4 in India?

1 supplier in India list FD&C Red 4 on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of FD&C Red 4?

Suppliers quote FD&C Red 4 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 FD&C Red 4

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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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