Molekula
Nile Blue A
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Nile Blue A is a cationic benzo[a]phenoxazinium (oxazine) dye used in fluorescence microscopy, staining biological tissues, and as a redox indicator in electrochemistry. It is available in powder form with a molecular weight of 732.85 g/mol, a molecular formula of 2C20H20N3O · SO4, and a CAS number of 3625-57-8. Stored at ambient temperature, it requires no signal word. Molekula supplies Nile Blue A 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
On backorder — expected to ship by 26 November 2026
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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5 g — £29.70 per pack ex VAT · £35.64 inc. VAT
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25 g — £110.00 per pack ex VAT · £132.00 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.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | Not regulated |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90034027 |
| CAS Number | 3625-57-8 |
| IUPAC Name | bis((5-aminobenzo[a]phenoxazin-9-ylidene)-diethylazanium);sulfate |
| EC Number | 222-832-5 |
| Molecular Formula | C40H40N6O6S |
| Molecular Weight | 732.85 |
| Exact Mass | 732.273 |
| SMILES | CC[N+](=C1C=CC2=NC3=C(C=C(C4=CC=CC=C43)N)OC2=C1)CC.CC[N+](=C1C=CC2=NC3=C(C=C(C4=CC=CC=C43)N)OC2=C1)CC.[O-]S(=O)(=O)[O-] |
| InChIKey | QIRDPEPUXNCOLD-UHFFFAOYSA-N |
| InChI | InChI=1S/2C20H19N3O.H2O4S/c2*1-3-23(4-2)13-9-10-17-18(11-13)24-19-12-16(21)14-7-5-6-8-15(14)20(19)22-17;1-5(2,3)4/h2*5-12,21H,3-4H2,1-2H3;(H2,1,2,3,4) |
| PubChem CID | 19256 |
| REACH Code | Y113 |
| HTS Code | 3212.90.0050 |
| Tariff Code | 3212900000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- (5-aminobenzo[a]phenoxazin-9-ylidene)-diethylazanium;sulfate
- 5-Amino-9-(diethylamino)benzo[a]phenoxazin-7-ium sulfate
- 5-Amino-9-(diethylamino)benzo[a]phenoxazinium sulfate
- Basic Blue 12
- Benzo[a]phenoxazin-7-ium, 5-amino-9-(diethylamino)-, sulfate (2:1)
- Nile blue
- Nile blue A (Technical Grade)
- Nile Blue A Solution
- Nile Blue A sulfate
- Nile Blue sulfate
Frequently asked questions
What is Nile Blue A used for?
Nile Blue A is primarily used as a fluorescent dye in biological staining and spectroscopy applications.
What is the chemical formula and molecular weight of Nile Blue A?
The formula is 2C20H20N3O · SO4 with a molecular weight of 732.85 g/mol.
How should Nile Blue A be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade of Nile Blue A is available?
Molekula supplies Nile Blue A in analytical grade.
Can Molekula supply Nile Blue A in bulk?
Yes, Molekula can supply Nile Blue A in bulk quantities upon request.
What documentation comes with a purchase of Nile Blue A?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS).
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.