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Dapi dihydrochloride

Also known as 4',6-Diamidino-2-phenylindole dihydrochloride, FxCycle Violet, 6-Amidino-2-(4-amidinophenyl)indole dihydrochloride

CAS 28718-90-3Formula C16H17Cl2N5Molar mass 350.25 g/molEC 249-186-7
GHS signal word: Warning. Pictograms: Harmful or irritant 9 suppliers listed
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Dapi dihydrochloride chemical structure, C16H17Cl2N5, CAS 28718-90-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
28718-90-3
Formula
C16H17Cl2N5
Molar mass
350.25 g/mol
EC number
249-186-7
HS code
293399
Category
Fluorescent probes and labels

What is Dapi dihydrochloride?

Plain description, key identifiers and synonyms

Dapi dihydrochloride is a chemical substance with the molecular formula C16H17Cl2N5 and a molar mass of 350.25 g/mol. Its CAS registry number is 28718-90-3. The IUPAC name is 2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide, dihydrochloride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide, dihydrochloride
CAS number
28718-90-3 CAS number cross-checked
EC number
249-186-7
Molecular formula
C16H17Cl2N5
UNII
76BFW26YJO
MDL number
MFCD00012681
InChIKey
FPNZBYLXNYPRLR-UHFFFAOYSA-N
InChI
InChI=1S/C16H15N5.2ClH/c17-15(18)10-3-1-9(2-4-10)13-7-11-5-6-12(16(19)20)8-14(11)21-13;;/h1-8,21H,(H3,17,18)(H3,19,20);2*1H
SMILES (canonical and isomeric)
C1=CC(=CC=C1C2=CC3=C(N2)C=C(C=C3)C(=N)N)C(=N)N.Cl.Cl

Synonyms

  • 4',6-Diamidino-2-phenylindole dihydrochloride
  • FxCycle Violet
  • 6-Amidino-2-(4-amidinophenyl)indole dihydrochloride
  • 1H-Indole-6-carboximidamide, 2-(4-(aminoiminomethyl)phenyl)-, hydrochloride (1:2)
  • 1H-Indole-6-carboximidamide, 2-[4-(aminoiminomethyl)phenyl]-, hydrochloride (1:2)
  • 2-(4-carbamimidoylphenyl)-1h-indole-6-carboximidamide dihydrochloride
  • DAPI.2HCl
  • DAPI (dihydrochloride)
  • 2-(4-Carbamimidoylphenyl)-1H-indole-6-carboximidamide 2hcl
  • 2-Phenylindole-4',6-dicarboxamidine dihydrohydrochloride (hydrate)
  • 2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide, dihydrochloride
  • 4',6-diamidino-2-phenylindole hydrochloride
  • 2-(4-Amidinophenyl)indole-6-carboxamidine Dihydrochloride
  • 2-(4-Amidinophenyl)-1H-indole-6-carboxamidine dihydrochloride
  • 4',6-Diamidino-2-phenylindole dihydrochloride, suitable for fluorescence, BioReagent, >=95.0% (HPLC)
  • 4',6-diamidino-2-phenylindole 2HCl
  • 2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide,dihydrochloride
  • DAPI 2HCl
  • DAPI, for nucleic acid staining
  • DAPI staining solution (ready to use)
  • DAPI, blue fluorescent nucleic acid stain
  • 4',6-diamidino-2-phenylindole,dihydrochloride
  • DAPI dihydrochloride Solution (10 mM in water)
  • 4',6-diamidino-2-phenylindole dihydrochloride (dapi)
  • 4',6-Diamidino-2-phenylindole dihydrochloride, 98%
Show all 33 synonyms
  • DAPI, 4',6-Diamidine-2'-phenylindole dihydrochloride
  • DAPI 2HCl (0.2mL*5) (1mg/mL in Water) [for Cell Staining]
  • 2-(4-Carbamimidoylphenyl)-1H-indole-6-carboxamidine dihydrochloride
  • 2-(4-Carbamimidoylphenyl)indole-6-carboximidamide Dihydrochlorid e
  • 2-[4-(aminoiminomethyl)phenyl]-1H-indole-6-carboximidamide, dihydrochloride
  • 2-(4-Carbamimidoylphenyl)-1H-indole-6-carboximidamide--hydrogen chloride (1/2)
  • 2-(4-Amidinophenyl)-6-indolecarbamidinedihydrochloride,4',6-Diamidino-2-phenylindoledihydrochloride,FxCycleViolet
  • 4',6-Diamidino-2-phenylindole dihydrochloride, powder, BioReagent, suitable for cell culture, >=98% (HPLC and TLC), suitable for fluorescence

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
350.25 g/molcalc.
Exact mass
349.0861 Dacalc.
LogP (octanol/water)
3.25calc.
Topological polar surface area
115.5 Ųcalc.
Hydrogen bond donors
5calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
23calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
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(-c2cc3ccccc3[nH]2)cc1

c1ccc(-c2cc3ccccc3[nH]2)cc1

3 rings, 15 atoms, the 2-Phenylindole ring system.

1,278 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.
  • H317May cause an allergic skin reaction.
  • H335May cause respiratory irritation.
Precautionary statements (15)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • 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.
  • 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.
  • P333 + P317If skin irritation or rash occurs: 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

Dapi dihydrochloride suppliers

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

All 9 suppliers
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Where suppliers are based

9 suppliers in 6 countries

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Dapi dihydrochloride 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

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 Dapi dihydrochloride is traded under.

HS 2933.99Indicative HS code

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

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Dapi dihydrochloride, based on the data on this page

What is Dapi dihydrochloride?

Dapi dihydrochloride is a chemical substance with the molecular formula C16H17Cl2N5 and a molar mass of 350.25 g/mol. Its CAS registry number is 28718-90-3. The IUPAC name is 2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide, dihydrochloride.

What is the CAS number of Dapi dihydrochloride?

The CAS registry number of Dapi dihydrochloride is 28718-90-3.

What is the molecular formula and weight of Dapi dihydrochloride?

The molecular formula of Dapi dihydrochloride is C16H17Cl2N5 and its molar mass is 350.25 g/mol.

What is Dapi dihydrochloride used for?

Known uses and roles of Dapi dihydrochloride include fluorescent probes in research and laboratory.

Is Dapi dihydrochloride hazardous?

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

What is the HS code of Dapi dihydrochloride?

Dapi dihydrochloride is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dapi dihydrochloride?

CompoundList lists 9 suppliers of Dapi dihydrochloride in China, United States, Switzerland, Czech Republic and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Dapi dihydrochloride?

Suppliers quote Dapi dihydrochloride 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 Dapi dihydrochloride

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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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