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Basic and cationic dyes

C.I. Basic Blue 3

Also known as Basic Blue 3, 3,7-Bis(diethylamino)phenoxazin-5-ium chloride, Phenoxazin-5-ium, 3,7-bis(diethylamino)-, chloride (1:1)

CAS 33203-82-6Formula C20H26ClN3OMolar mass 359.90 g/molEC 251-403-5
GHS signal word: Danger. Pictograms: Corrosive, Acute toxicity (severe), Harmful or irritant, Hazardous to the environment 2 suppliers listed
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C.I. Basic Blue 3 chemical structure, C20H26ClN3O, CAS 33203-82-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
33203-82-6
Formula
C20H26ClN3O
Molar mass
359.90 g/mol
EC number
251-403-5
HS code
320413
Category
Basic and cationic dyes

What is C.I. Basic Blue 3?

Plain description, key identifiers and synonyms

C.I. Basic Blue 3 is a chemical substance with the molecular formula C20H26ClN3O and a molar mass of 359.90 g/mol. Its CAS registry number is 33203-82-6. The IUPAC name is [7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium chloride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium chloride
CAS number
33203-82-6 CAS number cross-checkedOther or deprecated CAS: 55840-82-9, 6703-67-9
EC numbers
251-403-5, 611-321-6, 614-016-6
Molecular formula
C20H26ClN3O
UNII
H82L80329Y
MDL number
MFCD00011928
INCI name
BASIC BLUE 3
InChIKey
IURGIPVDZKDLIX-UHFFFAOYSA-M
InChI
InChI=1S/C20H26N3O.ClH/c1-5-22(6-2)15-9-11-17-19(13-15)24-20-14-16(23(7-3)8-4)10-12-18(20)21-17;/h9-14H,5-8H2,1-4H3;1H/q+1;/p-1
SMILES (canonical and isomeric)
CCN(CC)C1=CC2=C(C=C1)N=C3C=CC(=[N+](CC)CC)C=C3O2.[Cl-]

Synonyms

  • Basic Blue 3
  • 3,7-Bis(diethylamino)phenoxazin-5-ium chloride
  • Phenoxazin-5-ium, 3,7-bis(diethylamino)-, chloride (1:1)
  • Lowacryl blue 3
  • 7-(N,N-Diethylamino)phenoxazine-3-N,N-diethyliminium chloride
  • 3,7-Bis(diethylamino)phenoxazonium chloride
  • Diethyl(7-diethylamino-3H-phenoxazin-3-ylidene)ammonium chloride
  • Ammonium, (7-(diethylamino)-3H-phenoxazin-3-ylidene)diethyl-, chloride
  • Phenoxazin-5-ium, 3,7-bis(diethylamino)-, chloride
  • [7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium, chloride
  • C.I. 51004
  • Ethanaminium, N-(7-(diethylamino)-3H-phenoxazin-3-ylidene)-N-ethyl-, chloride
  • Basic Blue BG
  • BB 3 dye
  • [7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium,chloride
  • C.I. 51004 Basic Blue 3
  • Basic Blue 3, Dye content 25 %
  • Phenoxazin-5-ium,7-bis(diethylamino)-, chloride
  • [7-(diethylamino)phenoxazin-3-ylidene]-diethyl-ammonium, 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
359.90 g/molcalc.
Exact mass
359.1764 Dacalc.
LogP (octanol/water)
0.59calc.
Topological polar surface area
32.28 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
5calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.4calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
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, [N+]=c1ccc2nc3ccccc3oc-2c1

[N+]=c1ccc2nc3ccccc3oc-2c1

3 rings, 15 atoms.

40 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H302Harmful if swallowed.
  • H318Causes serious eye damage.
  • H319Causes serious eye irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (16)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P301 + P317If swallowed: Get medical help.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • P391Collect spillage.
  • P405Store locked up.
  • 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

C.I. Basic Blue 3 suppliers

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

All 2 suppliers

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

2 suppliers in 2 countries

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C.I. Basic Blue 3 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 BASIC BLUE 3(hair dyeing)

Functional uses

  • Dye

Cosmetic functions

  • Hair dyeing

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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 C.I. Basic Blue 3 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 C.I. Basic Blue 3 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about C.I. Basic Blue 3, based on the data on this page

What is C.I. Basic Blue 3?

C.I. Basic Blue 3 is a chemical substance with the molecular formula C20H26ClN3O and a molar mass of 359.90 g/mol. Its CAS registry number is 33203-82-6. The IUPAC name is [7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium chloride.

What is the CAS number of C.I. Basic Blue 3?

The CAS registry number of C.I. Basic Blue 3 is 33203-82-6. Other or deprecated CAS numbers: 55840-82-9, 6703-67-9.

What is the molecular formula and weight of C.I. Basic Blue 3?

The molecular formula of C.I. Basic Blue 3 is C20H26ClN3O and its molar mass is 359.90 g/mol.

What is C.I. Basic Blue 3 used for?

Use classes: Cosmetics.

Is C.I. Basic Blue 3 hazardous?

C.I. Basic Blue 3 carries the GHS signal word "Danger". Main hazards: toxic if swallowed, harmful if swallowed, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of C.I. Basic Blue 3?

C.I. Basic Blue 3 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 C.I. Basic Blue 3?

CompoundList lists 2 suppliers of C.I. Basic Blue 3 in China 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 C.I. Basic Blue 3 in India?

1 supplier in India list C.I. Basic Blue 3 on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of C.I. Basic Blue 3?

Suppliers quote C.I. Basic Blue 3 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 C.I. Basic Blue 3

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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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