Molekula
DAPI (4,6-Diamidino-2-phenylindole dihydrochloride)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
DAPI (4,6-Diamidino-2-phenylindole dihydrochloride) is a fluorescent stain widely used in molecular biology to bind strongly to DNA, enabling visualization under UV light for applications like cell cycle analysis, chromosome mapping, and fluorescence microscopy. This high-affinity dye is a white to off-white crystalline powder with a CAS number of 28718-90-3, molecular formula C16H17Cl2N5, and molecular weight of 350.25. Store between 2–8 °C, and handle with caution—it carries a **Warning** signal word. Molekula supplies DAPI from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 mg — £95.40 per pack ex VAT · £114.48 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
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Specifications
| Property | Value |
|---|---|
| Appearance | Yellow powder |
| Assay | ≥98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Acid |
For research use only. Not for human use.
Identification
| Property | Value |
|---|---|
| SKU | 38519003 |
| CAS Number | 28718-90-3 |
| IUPAC Name | 2-(4-carbamimidoylphenyl)-1H-indole-6-carboximidamide;dihydrochloride |
| EC Number | 249-186-7 |
| Molecular Formula | C16H17Cl2N5 |
| Molecular Weight | 350.25 |
| Exact Mass | 349.0861 |
| SMILES | C1=CC(=CC=C1C2=CC3=C(N2)C=C(C=C3)C(=N)N)C(=N)N.Cl.Cl |
| 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 |
| PubChem CID | 160166 |
| REACH Code | Y110 |
| HTS Code | 2933.99.8290 |
| Tariff Code | 2933998090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 2-(4-Amidinophenyl)indole-6-carboxamidine Dihydrochloride
- 2-(4-CARBAMIMIDOYLPHENYL)-1H-INDOLE-6-CARBOXIMIDAMIDE 2HCL
- 2-(4-carbamimidoylphenyl)-1h-indole-6-carboximidamide dihydrochloride
- 2-Phenylindole-4',6-dicarboxamidine dihydrohydrochloride (hydrate)
- 4',6-Diamidino-2-phenylindole dihydrochloride
- 4',6-diamidino-2-phenylindole hydrochloride
- 6-AMIDINO-2-(4-AMIDINOPHENYL)INDOLE DIHYDROCHLORIDE
- DAPI dihydrochloride
- DAPI.2HCl
- FxCycle Violet
Frequently asked questions
What is DAPI (4,6-Diamidino-2-phenylindole dihydrochloride) commonly used for?
DAPI is primarily used as a fluorescent stain that binds strongly to DNA, making it ideal for visualizing cell nuclei in microscopy, flow cytometry, and fluorescence-based assays.
What is the chemical formula and molecular weight of DAPI?
The chemical formula is **C16H17Cl2N5** and the molecular weight is **350.25 g/mol**.
How should DAPI be stored?
Store DAPI at **2 to 8 °C**, protected from light and moisture to maintain stability.
What purity grades of DAPI does Molekula supply?
Molekula supplies DAPI in **analytical and biochemical research grades**, typically ≥98% purity.
Can Molekula supply DAPI in bulk quantities?
Yes, Molekula can provide DAPI in bulk, with quantities and packaging tailored to your research or industrial needs.
What documentation comes with a DAPI order from Molekula?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.