Molekula
Patent Blue V
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
Patent Blue V is a synthetic triarylmethane dye primarily used in medical diagnostics, food coloring, and biological staining. It is commonly employed as a vital stain in surgery to identify lymph nodes and sentinel nodes, as well as in food products under the designation E131. Industrially, it also serves as a dye for wool, silk, leather and paper, and as a colorant for inks, milled soaps and phenol-formaldehyde resins. This chemical has a CAS number of 129-17-9, with the molecular formula C27H31N2NaO6S2 and a molecular weight of 566.66. It should be stored at ambient conditions. The product is classified with a signal word of "Danger" due to its potential hazards. Molekula supplies Patent Blue V 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.
Often bought together
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 g — £35.60 per pack ex VAT · £42.72 inc. VAT
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100 g — £135.00 per pack ex VAT · £162.00 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 | Dark blue-green to dark purple powder |
| Melting Point | 199°C - 201°C |
| pH | 4 - 6 |
| Assay | ≥ 85.00% |
| Solubility in water | 10 g / l at 20˚C (Soluble) |
| Identification (IR) | Conforms to reference |
| Absorption maxima | 635 - 641 nm (≥ 50000) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Violet powder |
Source: PubChem CID 8507 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 10362000 |
| CAS Number | 129-17-9 |
| IUPAC Name | sodium 4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]benzene-1,3-disulfonate |
| EC Number | 204-934-1 |
| Molecular Formula | C27H31N2NaO6S2 |
| Molecular Weight | 566.66 |
| Exact Mass | 566.1521 |
| SMILES | CCN(CC)C1=CC=C(C=C1)C(=C2C=CC(=[N+](CC)CC)C=C2)C3=C(C=C(C=C3)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+] |
| InChIKey | SJEYSFABYSGQBG-UHFFFAOYSA-M |
| InChI | InChI=1S/C27H32N2O6S2.Na/c1-5-28(6-2)22-13-9-20(10-14-22)27(21-11-15-23(16-12-21)29(7-3)8-4)25-18-17-24(36(30,31)32)19-26(25)37(33,34)35;/h9-19H,5-8H2,1-4H3,(H-,30,31,32,33,34,35);/q;+1/p-1 |
| PubChem CID | 8507 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H312 Harmful in contact with skin
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- Acid Blue V
- Alphazurine 2G
- Blue VRS
- Disulphen Blau
- Disulphine VN
- Hexacol Blue VRS
- Hidacid Blue V
- Patent Blue VF
- Sulfan Blue
- Sulphanblau
Frequently asked questions
What is Patent Blue V primarily used for?
Patent Blue V is commonly used as a dye in biological staining, food coloring (E131), and as a tracer in medical and pharmaceutical applications.
What is the chemical formula and molecular weight of Patent Blue V?
The chemical formula is **C27H31N2NaO6S2** with a molecular weight of **566.66 g/mol**.
How should Patent Blue V be stored?
Store Patent Blue V at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible materials.
What purity grades of Patent Blue V does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/JP)** and **analytical-grade** Patent Blue V, depending on application requirements.
Can Molekula supply Patent Blue V in bulk quantities?
Yes, Molekula can provide **bulk quantities** of Patent Blue V, with packaging options including drums, bags, or custom solutions for large orders.
What documentation comes with an order of Patent Blue V?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, 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.