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Fluorescent dyes and stains

Pyronine B

Also known as Pyronin B, 3,6-Bis(diethylamino)xanthylium chloride, Pyronine B(By)

CAS 2150-48-3Formula C21H27ClN2OMolar mass 358.91 g/molEC 218-429-9
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Pyronine B chemical structure, C21H27ClN2O, CAS 2150-48-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2150-48-3
Formula
C21H27ClN2O
Molar mass
358.91 g/mol
EC number
218-429-9
HS code
293299
Category
Fluorescent dyes and stains

What is Pyronine B?

Plain description, key identifiers and synonyms

Pyronin B is an organic chloride salt having 6-(diethylamino)-N,N-diethyl-3H-xanthen-3-iminium as the cation. Depending on the mode of manufacture, pyronin B also exists in the form of an FeCl3 complex. It has a role as a histological dye. It is an iminium salt and an organic chloride salt. It contains a pyronin B(1+).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[6-(diethylamino)xanthen-3-ylidene]-diethylazanium chloride
CAS number
2150-48-3 CAS number cross-checked
EC number
218-429-9
Molecular formula
C21H27ClN2O
UNII
N3P889IX5O
MDL number
MFCD00011932
InChIKey
CXZRDVVUVDYSCQ-UHFFFAOYSA-M
InChI
InChI=1S/C21H27N2O.ClH/c1-5-22(6-2)18-11-9-16-13-17-10-12-19(23(7-3)8-4)15-21(17)24-20(16)14-18;/h9-15H,5-8H2,1-4H3;1H/q+1;/p-1
SMILES (canonical and isomeric)
CCN(CC)C1=CC2=C(C=C1)C=C3C=CC(=[N+](CC)CC)C=C3O2.[Cl-]

Synonyms

  • Pyronin B
  • 3,6-Bis(diethylamino)xanthylium chloride
  • Pyronine B(By)
  • Pyronine B, purified
  • C.I. 45010
  • (6-(Diethylamino)-3H-xanthen-3-ylidine)diethylammonium chloride
  • N-(6-(Diethylamino)-3H-xanthen-3-ylidine)-N-ethylethanaminium chloride
  • Xanthylium, 3,6-bis(diethylamino)-, chloride
  • Pyronin B Certified
  • E tetraethylpyronin
  • [6-(diethylamino)xanthen-3-ylidene]-diethylazanium, chloride
  • 6-(Diethylamino)-N,N-diethyl-3H-xanthen-3-iminium chloride
  • C21H27ClN2O
  • CI 451
  • 3,6-Bis(diethylamino)xanthen-10-ium chloride
  • [6-(diethylamino)xanthen-3-ylidene]-diethyl-ammonium, chloride
  • N-(6-(diethylamino)-3H-xanthen-3-ylidene)-N-ethylethanaminium 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
358.91 g/molcalc.
Exact mass
358.1812 Dacalc.
LogP (octanol/water)
1.2calc.
Topological polar surface area
19.39 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
5calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.38calc.
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+]=c1ccc2cc3ccccc3oc-2c1

[N+]=c1ccc2cc3ccccc3oc-2c1

3 rings, 15 atoms.

6 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.

Pyronine B suppliers

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All 2 suppliers

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Where suppliers are based

2 suppliers in 2 countries

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Pyronine B price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Roles

  • dye
  • histological dye

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 Pyronine B is traded under.

HS 2932.99Indicative HS code

Heterocyclic compounds with oxygen hetero-atom(s) only, other

World exports in 2024
$3.81B
+10.3% vs 2023, imports $7.05B
2019 to 2024
Top exporters
  1. China28.9%
  2. Switzerland * partner reported12.7%
  3. Germany7.8%
Top importers
  1. United States49.7%
  2. China11.9%
  3. India * partner reported3.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Pyronine B, based on the data on this page

What is Pyronine B?

Pyronin B is an organic chloride salt having 6-(diethylamino)-N,N-diethyl-3H-xanthen-3-iminium as the cation. Depending on the mode of manufacture, pyronin B also exists in the form of an FeCl3 complex. It has a role as a histological dye. It is an iminium salt and an organic chloride salt. It contains a pyronin B(1+).

What is the CAS number of Pyronine B?

The CAS registry number of Pyronine B is 2150-48-3.

What is the molecular formula and weight of Pyronine B?

The molecular formula of Pyronine B is C21H27ClN2O and its molar mass is 358.91 g/mol.

What is Pyronine B used for?

Known uses and roles of Pyronine B include indicators and stains in research and laboratory, dye and histological dye.

Is Pyronine B hazardous?

No GHS hazard classification for Pyronine B 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 Pyronine B?

Pyronine B is usually classified under HS code 293299 (Heterocyclic compounds with oxygen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pyronine B?

CompoundList lists 2 suppliers of Pyronine B in India and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pyronine B in India?

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

What is the price of Pyronine B?

Suppliers quote Pyronine B 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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