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Basic and cationic dyes

Phenosafranine

Also known as Phenosafranin, Phenosafranine, chloride, Phenosafrinine

CAS 81-93-6Formula C18H15ClN4Molar mass 322.80 g/molEC 201-387-0
GHS signal word: Warning. Pictograms: Harmful or irritant 4 suppliers listed
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Phenosafranine chemical structure, C18H15ClN4, CAS 81-93-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
81-93-6
Formula
C18H15ClN4
Molar mass
322.80 g/mol
EC number
201-387-0
HS code
320413
Category
Basic and cationic dyes

What is Phenosafranine?

Plain description, key identifiers and synonyms

Phenosafranine is an organic chloride salt having 3,7-diamino-5-phenylphenazin-5-ium as the counterion. It is commonly used for staining Gram negative bacteria red in smears to contrast with the blue Gram positive organisms. It has a role as a photosensitizing agent, a fluorochrome and a histological dye. It contains a 3,7-diamino-5-phenylphenazin-5-ium.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
10-phenylphenazin-10-ium-2,8-diamine chloride
CAS number
81-93-6 CAS number cross-checked
EC number
201-387-0
Molecular formula
C18H15ClN4
UNII
47U3T2FC2W
MDL number
MFCD00036335
InChIKey
SOUHUMACVWVDME-UHFFFAOYSA-N
InChI
InChI=1S/C18H14N4.ClH/c19-12-6-8-15-17(10-12)22(14-4-2-1-3-5-14)18-11-13(20)7-9-16(18)21-15;/h1-11H,(H3,19,20);1H
SMILES (canonical and isomeric)
C1=CC=C(C=C1)[N+]2=C3C=C(C=CC3=NC4=C2C=C(C=C4)N)N.[Cl-]

Synonyms

  • Phenosafranin
  • Phenosafranine, chloride
  • Phenosafrinine
  • Phenosofranine
  • Phenosofrinine
  • Safranin B Extra
  • Safrinin B Extra
  • 3,7-Diamino-5-phenylphenazinium chloride
  • Schultz No. 958
  • C.I. 50200
  • 3,7-diamino-5-phenylphenazin-5-ium chloride
  • Phenazinium, 3,7-diamino-5-phenyl-, chloride
  • 10-phenylphenazin-10-ium-2,8-diamine, chloride
  • Phenosafranin, Dye content 80 %
  • 10-phenylphenazin-10-ium-2,8-diamine chloride
  • Safranin b
  • Phenosafranin(CI 50200)
  • Phenazinium,2,8-diamino-10-phenyl-,chloride(1:1)

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
322.80 g/molcalc.
Exact mass
322.0985 Dacalc.
LogP (octanol/water)
-0.17calc.
Topological polar surface area
68.81 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
23calc.
Rings
4calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0calc.
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, c1ccc(-[n+]2c3ccccc3nc3ccccc32)cc1

c1ccc(-[n+]2c3ccccc3nc3ccccc32)cc1

4 rings, 20 atoms, the Phenazinium, 5-phenyl- ring system.

29 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

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Phenosafranine suppliers

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

All 4 suppliers
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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

4 suppliers in 3 countries

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Phenosafranine 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
  • fluorescent dye
  • fluorochrome
  • histological dye
  • pharmaceutical
  • photosensitizing agent

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

Frequently asked questions

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

What is Phenosafranine?

Phenosafranine is an organic chloride salt having 3,7-diamino-5-phenylphenazin-5-ium as the counterion. It is commonly used for staining Gram negative bacteria red in smears to contrast with the blue Gram positive organisms. It has a role as a photosensitizing agent, a fluorochrome and a histological dye.

What is the CAS number of Phenosafranine?

The CAS registry number of Phenosafranine is 81-93-6.

What is the molecular formula and weight of Phenosafranine?

The molecular formula of Phenosafranine is C18H15ClN4 and its molar mass is 322.80 g/mol.

What is Phenosafranine used for?

Known uses and roles of Phenosafranine include textile dyes in textiles and leather, indicators and stains in research and laboratory, dye, fluorescent dye, fluorochrome and 3 more.

Is Phenosafranine hazardous?

Phenosafranine carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phenosafranine?

Phenosafranine 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 Phenosafranine?

CompoundList lists 4 suppliers of Phenosafranine in India, Switzerland 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 Phenosafranine in India?

2 suppliers in India list Phenosafranine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Phenosafranine?

Suppliers quote Phenosafranine 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 Phenosafranine

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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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