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Basic and cationic dyes

Basic Blue 5

Also known as 4-((2-Chlorophenyl)(4-(ethylimino)-3-methylcyclohexa-2,5-dien-1-ylidene)methyl)-N-ethyl-o-toluidine monohydrochloride, Setocyanine, Brilliant Glacier Blue

CAS 3943-82-6Formula C25H28Cl2N2Molar mass 427.42 g/molEC 223-528-5
GHS signal word: Warning. Pictograms: Harmful or irritant
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Basic Blue 5 chemical structure, C25H28Cl2N2, CAS 3943-82-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3943-82-6
Formula
C25H28Cl2N2
Molar mass
427.42 g/mol
EC number
223-528-5
HS code
320413
Category
Basic and cationic dyes

What is Basic Blue 5?

Plain description, key identifiers and synonyms

Basic Blue 5 is a chemical substance with the molecular formula C25H28Cl2N2 and a molar mass of 427.42 g/mol. Its CAS registry number is 3943-82-6. The IUPAC name is 4-[(2-chlorophenyl)-(4-ethylimino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-N-ethyl-2-methylaniline, hydrochloride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-[(2-chlorophenyl)-(4-ethylimino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-N-ethyl-2-methylaniline, hydrochloride
CAS number
3943-82-6 CAS number cross-checked
EC number
223-528-5
Molecular formula
C25H28Cl2N2
InChIKey
MDOWYKFAQVNQJR-UHFFFAOYSA-N
InChI
InChI=1S/C25H27ClN2.ClH/c1-5-27-23-13-11-19(15-17(23)3)25(21-9-7-8-10-22(21)26)20-12-14-24(28-6-2)18(4)16-20;/h7-16,27H,5-6H2,1-4H3;1H
SMILES (canonical and isomeric)
CCNC1=C(C=C(C=C1)C(=C2C=CC(=NCC)C(=C2)C)C3=CC=CC=C3Cl)C.Cl

Synonyms

  • 4-((2-Chlorophenyl)(4-(ethylimino)-3-methylcyclohexa-2,5-dien-1-ylidene)methyl)-N-ethyl-o-toluidine monohydrochloride
  • Setocyanine
  • Brilliant Glacier Blue

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
427.42 g/molcalc.
Exact mass
426.163 Dacalc.
LogP (octanol/water)
7.28calc.
Topological polar surface area
24.39 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
5calc.
Heavy atoms
29calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.24calc.
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, N=C1C=CC(=C(c2ccccc2)c2ccccc2)C=C1

N=C1C=CC(=C(c2ccccc2)c2ccccc2)C=C1

3 rings, 20 atoms.

94 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Basic Blue 5 suppliers

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Basic Blue 5 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

Industries and functions

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 Basic Blue 5 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 5 is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Basic Blue 5, based on the data on this page

What is Basic Blue 5?

Basic Blue 5 is a chemical substance with the molecular formula C25H28Cl2N2 and a molar mass of 427.42 g/mol. Its CAS registry number is 3943-82-6. The IUPAC name is 4-[(2-chlorophenyl)-(4-ethylimino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]-N-ethyl-2-methylaniline, hydrochloride.

What is the CAS number of Basic Blue 5?

The CAS registry number of Basic Blue 5 is 3943-82-6.

What is the molecular formula and weight of Basic Blue 5?

The molecular formula of Basic Blue 5 is C25H28Cl2N2 and its molar mass is 427.42 g/mol.

What is Basic Blue 5 used for?

Known uses and roles of Basic Blue 5 include textile dyes in textiles and leather.

Is Basic Blue 5 hazardous?

Basic Blue 5 carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Basic Blue 5?

Basic Blue 5 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 5?

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What is the price of Basic Blue 5?

Suppliers quote Basic Blue 5 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 Basic Blue 5

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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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