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Basic and cationic dyes

Basic Blue 8

Also known as Victoria blue 4R, C.I. Basic Blue 8, Victoria Blue F 4R

CAS 2185-87-7Formula C34H34ClN3Molar mass 520.12 g/molEC 218-573-2
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Basic Blue 8 chemical structure, C34H34ClN3, CAS 2185-87-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2185-87-7
Formula
C34H34ClN3
Molar mass
520.12 g/mol
EC number
218-573-2
HS code
320413
Category
Basic and cationic dyes

What is Basic Blue 8?

Plain description, key identifiers and synonyms

Victoria blue 4R is an iminium salt composed of 4-([4-(dimethylamino)phenyl]{4-[methyl(phenyl)amino]naphthalen-1-yl}methylidene)-N,N-dimethylcyclohexa-2,5-dien-1-iminium and chloride ions in a 1:1 ratio. It binds to nucleic acids and can be used in standardised staining techniques suitable for automated cell-pattern recognition. It has a role as a fluorochrome and a histological dye. It is an iminium salt and an organic chloride salt. It contains a victoria blue 4R(1+).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[4-[bis[4-(dimethylamino)phenyl]methylidene]naphthalen-1-ylidene]-methyl-phenylazanium chloride
CAS number
2185-87-7 CAS number cross-checked
EC number
218-573-2
Molecular formula
C34H34ClN3
InChIKey
AODQPPLFAXTBJS-UHFFFAOYSA-M
InChI
InChI=1S/C34H34N3.ClH/c1-35(2)27-19-15-25(16-20-27)34(26-17-21-28(22-18-26)36(3)4)32-23-24-33(31-14-10-9-13-30(31)32)37(5)29-11-7-6-8-12-29;/h6-24H,1-5H3;1H/q+1;/p-1
SMILES (canonical and isomeric)
CN(C)C1=CC=C(C=C1)C(=C2C=CC(=[N+](C)C3=CC=CC=C3)C4=CC=CC=C24)C5=CC=C(C=C5)N(C)C.[Cl-]

Synonyms

  • Victoria blue 4R
  • C.I. Basic Blue 8
  • Victoria Blue F 4R
  • Victoria Basic Blue F4R
  • N-(4-((4-(Dimethylamino)phenyl)(4-(methylphenylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadi en-1-ylidene)-N-methylmethanaminium chloride
  • C.I.Basic blue 8
  • [4-[bis[4-(dimethylamino)phenyl]methylidene]naphthalen-1-ylidene]-methyl-phenylazanium, chloride
  • (4-((4-(Dimethylamino)phenyl)(4-toluidino-1-naphthyl)methylene)cyclohexa-2,5-dien-1-ylidene)dimethylammonium chloride
  • 4-([4-(dimethylamino)phenyl]{4-[methyl(phenyl)amino]naphthalen-1-yl}methylidene)-N,N-dimethylcyclohexa-2,5-dien-1-iminium chloride
  • C34H34ClN3
  • C.I. 42563
  • [4-[bis[4-(dimethylamino)phenyl]methylene]-1-naphthylidene]-methyl-phenyl-ammonium, chloride
  • Methanaminium, N-(4-((4-(dimethylamino)phenyl)(4-(methylphenylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-methyl-, chloride
  • N-(4-((4-(Dimethylamino)phenyl)(4-(methyl(phenyl)amino)naphthalen-1-yl)methylene)cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride

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
520.12 g/molcalc.
Exact mass
519.2441 Dacalc.
LogP (octanol/water)
4.11calc.
Topological polar surface area
9.49 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
5calc.
Heavy atoms
38calc.
Rings
5calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0.15calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
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, C1=CC(=C(c2ccccc2)c2ccccc2)c2ccccc2C1=Nc1ccccc1

C1=CC(=C(c2ccccc2)c2ccccc2)c2ccccc2C1=Nc1ccccc1

5 rings, 30 atoms.

14 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.

Basic Blue 8 suppliers

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Where suppliers are based

1 supplier in 1 country

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Basic Blue 8 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

Roles

  • dye
  • fluorescent dye
  • fluorochrome
  • histological dye

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Basic Blue 8 is traded under.

HS 3204.13Indicative HS code

Basic dyes and preparations based thereon

World exports in 2024
$209M
−2.6% vs 2023, imports $224M
2019 to 2024
Top exporters
  1. India * partner reported27.9%
  2. China21.8%
  3. Spain6.6%
Top importers
  1. United States11.2%
  2. China7.9%
  3. Germany7.4%

* Partner reported figures, a lower bound.

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

The HS code shown for Basic Blue 8 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Basic Blue 8, based on the data on this page

What is Basic Blue 8?

Victoria blue 4R is an iminium salt composed of 4-([4-(dimethylamino)phenyl]{4-[methyl(phenyl)amino]naphthalen-1-yl}methylidene)-N,N-dimethylcyclohexa-2,5-dien-1-iminium and chloride ions in a 1:1 ratio.

What is the CAS number of Basic Blue 8?

The CAS registry number of Basic Blue 8 is 2185-87-7.

What is the molecular formula and weight of Basic Blue 8?

The molecular formula of Basic Blue 8 is C34H34ClN3 and its molar mass is 520.12 g/mol.

What is Basic Blue 8 used for?

Known uses and roles of Basic Blue 8 include textile dyes in textiles and leather, indicators and stains in research and laboratory, dye, fluorescent dye, fluorochrome and 1 more.

Is Basic Blue 8 hazardous?

No GHS hazard classification for Basic Blue 8 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 Basic Blue 8?

Basic Blue 8 is usually classified under HS code 320413 (Basic dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Basic Blue 8?

CompoundList lists 1 supplier of Basic Blue 8 in United Kingdom. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Basic Blue 8?

Suppliers quote Basic Blue 8 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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