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Acid and mordant dyes

Phloxine

Also known as Acid red 98, C.I. ACID RED 98, CI acid red 98

CAS 6441-77-6Formula C20H4Br4Cl2K2O5Molar mass 792.97 g/molEC 229-225-4
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Phloxine chemical structure, C20H4Br4Cl2K2O5, CAS 6441-77-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
6441-77-6
Formula
C20H4Br4Cl2K2O5
Molar mass
792.97 g/mol
EC number
229-225-4
HS code
320412
Category
Acid and mordant dyes

What is Phloxine?

Plain description, key identifiers and synonyms

Phloxine is a chemical substance with the molecular formula C20H4Br4Cl2K2O5 and a molar mass of 792.97 g/mol. Its CAS registry number is 6441-77-6. The IUPAC name is dipotassium, 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dipotassium, 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate
CAS number
6441-77-6 CAS number cross-checked
EC number
229-225-4
Molecular formula
C20H4Br4Cl2K2O5
UNII
QDW0T759T6
INCI name
CI 45405
InChIKey
JBBPTUVOZCXCSU-UHFFFAOYSA-L
InChI
InChI=1S/C20H6Br4Cl2O5.2K/c21-7-3-5-17(13(23)15(7)27)30-18-6(4-8(22)16(28)14(18)24)20(5)12-10(26)2-1-9(25)11(12)19(29)31-20;;/h1-4,27-28H;;/q;2*+1/p-2
SMILES (canonical and isomeric)
C1=CC(=C2C(=C1Cl)C(=O)OC23C4=CC(=C(C(=C4OC5=C(C(=C(C=C35)Br)[O-])Br)Br)[O-])Br)Cl.[K+].[K+]

Synonyms

  • Acid red 98
  • C.I. ACID RED 98
  • CI acid red 98
  • C.I. 45405
  • CI 45405
  • Dipotassium 3,6-dichloro-2-(2,4,5,7-tetrabromo-6-oxido-3-oxoxanthen-9-yl)benzoate
  • Fluorescein, 4,7-dichloro-2',4',5',7'-tetrabromo-, dipotassium salt
  • Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',3',5',7'-tetrabromo-4,7-dichloro-3',6'-dihydroxy-, dipotassium salt
  • Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',4',5',7'-tetrabromo-4,7-dichloro-3',6'-dihydroxy-, potassium salt (1:2)
  • Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 2',4',5',7'-tetrabromo-4,7-dichloro-3',6'-dihydroxy-, potassium salt (1:2)
  • 2',4',5',7'-Tetrabromo-4,7-tetrabromo-4,7-dichloro-3',6'-dihydrox-yspiro(isobenzofuran-1(3H)9'-(9H)xanthen)-3-one, dipotassium salt
  • Phloxine K
  • Toyo Acid Phloxine
  • PhloxineDISCONTINUED
  • C.I. FOOD RED 92
  • 2,4,5,7-Tetrabromo-12,15-dichlorofluorescein, dipotassium salt
  • 4,6-Dichloro-2',4',5',7'-tetrabromofluorescein dipotassium salt
  • Fluorescein, 2',4',5',7'-tetrabromo-4,7-dichloro-, dipotassium salt
  • 2',4',5',7'-Tetrabromo-4,7-tetrabromo-4,7-dichloro-3',6'-dihydrox- yspiro(isobenzofuran-1(3H)9'-(9H)xanthen)-3-one, dipotassium salt
  • dipotassium, 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate
  • 2',4',5',7'-Tetrabromo-4,7-tetrabromo-4,7-dichloro-3',6'- dihydrox- yspiro(isobenzofuran-1(3H)9'-(9H)xanthen)-3-one, dipotassium salt
  • Dipotassium 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxo-3H-spiro[[2]benzofuran-1,9'-xanthene]-3',6'-bis(olate)
  • Potassium 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-bis(olate)

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
792.97 g/molcalc.
Exact mass
787.5443 Dacalc.
LogP (octanol/water)
0.77calc.
Topological polar surface area
81.65 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
0calc.
Heavy atoms
33calc.
Rings
5calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.05calc.
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, O=C1OC2(c3ccccc3Oc3ccccc32)c2ccccc21

O=C1OC2(c3ccccc3Oc3ccccc32)c2ccccc21

5 rings, 23 atoms, the Fluoran ring system.

438 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.

Phloxine suppliers

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Phloxine 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

Use classes: Cosmetics.

Cosmetic ingredient, INCI name CI 45405(colorant)

Functional uses

  • Dye

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 45405, Ref no: 78, Annex ref: IV/78

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phloxine 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 Phloxine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Phloxine?

Phloxine is a chemical substance with the molecular formula C20H4Br4Cl2K2O5 and a molar mass of 792.97 g/mol. Its CAS registry number is 6441-77-6. The IUPAC name is dipotassium, 2',4',5',7'-tetrabromo-4,7-dichloro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate.

What is the CAS number of Phloxine?

The CAS registry number of Phloxine is 6441-77-6.

What is the molecular formula and weight of Phloxine?

The molecular formula of Phloxine is C20H4Br4Cl2K2O5 and its molar mass is 792.97 g/mol.

What is Phloxine used for?

Use classes: Cosmetics.

Is Phloxine hazardous?

No GHS hazard classification for Phloxine 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 Phloxine?

Phloxine 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 Phloxine?

CompoundList lists 1 supplier of Phloxine in India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Phloxine in India?

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

What is the price of Phloxine?

Suppliers quote Phloxine 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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