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Fluorescent dyes and stains

Pyronine

Also known as Pyronin Y, Pyronine Y, Pyronin G

CAS 92-32-0Formula C17H19ClN2OMolar mass 302.81 g/molEC 202-147-8
GHS signal word: Warning. Pictograms: Serious health hazard 14 suppliers listed
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Pyronine chemical structure, C17H19ClN2O, CAS 92-32-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
92-32-0
Formula
C17H19ClN2O
Molar mass
302.81 g/mol
Physical form
Liquid
HS code
293299
Category
Fluorescent dyes and stains
Illustrative photo, closed amber glass reagent bottles on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Pyronine?

Plain description, key identifiers and synonyms

Pyronin Y is an organic chloride salt having 6-(dimethylamino)-N,N-dimethyl-3H-xanthen-3-iminium as the cation. Used with methyl green to selectively demonstrate RNA (red) in contrast to DNA (green) with the Unna-Pappenheim method. It has a role as a histological dye. It is an iminium salt and an organic chloride salt. It contains a pyronin Y cation.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[6-(dimethylamino)xanthen-3-ylidene]-dimethylazanium chloride
CAS number
92-32-0 CAS number cross-checked
EC number
202-147-8
Molecular formula
C17H19ClN2O
UNII
W659G165T1
MDL number
MFCD00011725
InChIKey
INCIMLINXXICKS-UHFFFAOYSA-M
InChI
InChI=1S/C17H19N2O.ClH/c1-18(2)14-7-5-12-9-13-6-8-15(19(3)4)11-17(13)20-16(12)10-14;/h5-11H,1-4H3;1H/q+1;/p-1
SMILES (canonical and isomeric)
CN(C)C1=CC2=C(C=C1)C=C3C=CC(=[N+](C)C)C=C3O2.[Cl-]

Synonyms

  • Pyronin Y
  • Pyronine Y
  • Pyronin G
  • Pyronin Yellow
  • Pyronine G
  • 3,6-Bis(dimethylamino)xanthylium chloride
  • Tetramethyl pyronin
  • Xanthylium, 3,6-bis(dimethylamino)-, chloride
  • Methyl pyronin
  • Pyronine ZH
  • C.I. 45005
  • tetramethyldiaminoxanthylium chloride
  • Schultz No. 853
  • (6-(dimethylamino)xanthen-3-ylidene)-dimethyl-ammonium, chloride
  • [6-(dimethylamino)xanthen-3-ylidene]-dimethyl-ammonium, chloride
  • Pyronine Y, Technical Grade
  • Ammonium, (6-(dimethylamino)-3H-xanten-3-ylidene)dimethyl-, chloride
  • Pyronin J
  • 6-(dimethylamino)-N,N-dimethyl-3H-xanthen-3-iminium chloride
  • N-(6-(Dimethylamino-3H-Xanthen-3-Ylidene)-N-Methyl-Methanaminium Chloride
  • Pyronin Y, certified by the Biological Stain Commission, Dye content 50 %
  • ammoni
  • [6-(dimethylamino)xanthen-3-ylidene]dimethylamine, chloride
  • Pyronin
  • 6-(Dimethylamino)-3H-xanthen-3-ylidene]dimethylammonium Chloride,
Show all 34 synonyms
  • [6-(dimethylamino)xanthen-3-ylidene]-dimethyl-ammonium
  • N-[6-(dimethylamino)-3H-xanthen-3-ylidene]-N-methylmethanaminium chloride
  • [6-(dimethylamino)xanthen-3-ylidene]-dimethylazanium, chloride
  • [6-(dimethylamino)xanthen-3-ylidene]-dimethylazanium chloride
  • Pyronin Y, for NA electrophoresis
  • CI 455
  • Methanaminium, N-(6-(dimethylamino)-3H-xanthen-3-ylidene)-N-methyl-, chloride
  • 3,6-Bis(dimethylamino)xanthyliumchloride
  • 3,6-bis(dimethylamino)-xanthylium 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

Physical form
Liquidexp.

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
302.81 g/molcalc.
Exact mass
302.1186 Dacalc.
LogP (octanol/water)
-0.36calc.
Topological polar surface area
19.39 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
21calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.24calc.
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

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H341Suspected of causing genetic defects.
Precautionary statements (5)
  • P203Obtain, read and follow all safety instructions before use.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • 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

Pyronine suppliers

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

All 14 suppliers
14 of 14 offers

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Where suppliers are based

14 suppliers in 5 countries

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Pyronine 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

Industrial uses: Filler.

Pharmacological actions

  • Coloring Agents

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

Frequently asked questions

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

What is Pyronine?

Pyronin Y is an organic chloride salt having 6-(dimethylamino)-N,N-dimethyl-3H-xanthen-3-iminium as the cation. Used with methyl green to selectively demonstrate RNA (red) in contrast to DNA (green) with the Unna-Pappenheim method. It has a role as a histological dye. It is an iminium salt and an organic chloride salt.

What is the CAS number of Pyronine?

The CAS registry number of Pyronine is 92-32-0.

What is the molecular formula and weight of Pyronine?

The molecular formula of Pyronine is C17H19ClN2O and its molar mass is 302.81 g/mol.

What is Pyronine used for?

Industrial uses: Filler.

Is Pyronine hazardous?

Pyronine carries the GHS signal word "Warning". Main hazards: suspected of causing genetic defects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pyronine?

Pyronine 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?

CompoundList lists 14 suppliers of Pyronine in United States, China, United Kingdom, India and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pyronine in India?

1 supplier in India list Pyronine 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?

Suppliers quote Pyronine 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 Pyronine

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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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