Molekula
Methylene Blue Zinc Free 82%
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
Methylene Blue Zinc Free 82% is a synthetic phenothiazine dye used primarily as a redox indicator, medical stain, and antimicrobial agent in biological research, wastewater treatment, and medical applications. This high-purity formulation contains 82% active methylene blue with no zinc impurities. Key specifications include a CAS number of 61-73-4, molecular formula C16H18ClN3S, and molecular weight of 319.85 g/mol. It is stored at ambient conditions with a signal word of "Warning" for safety. Molekula supplies Methylene Blue Zinc Free 82% 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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, crystalline powder with a copper coloured sheen or green crystals with a bronze coloured sheen |
| Melting Point | 188 - 192°C |
| Loss on Drying | (@105℃) 8.0-22.0% |
| Solubility | Soluble in water |
| Dye Content | ≥82.0% |
| Specific absorptivity | (λmax0.003g/l in ethanol) 2250-2750 |
| Absorption maxima | (in 50% ethanol) 660 - 665 nm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90037152 |
| CAS Number | 61-73-4 |
| IUPAC Name | [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium chloride |
| EC Number | 200-515-2 |
| Molecular Formula | C16H18ClN3S |
| Molecular Weight | 319.85 |
| Exact Mass | 319.091 |
| SMILES | CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.[Cl-] |
| InChIKey | CXKWCBBOMKCUKX-UHFFFAOYSA-M |
| InChI | InChI=1S/C16H18N3S.ClH/c1-18(2)11-5-7-13-15(9-11)20-16-10-12(19(3)4)6-8-14(16)17-13;/h5-10H,1-4H3;1H/q+1;/p-1 |
| PubChem CID | 6099 |
| REACH Code | Y110 |
| HTS Code | 3204.13.51 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H361 Suspected of damaging fertility or the unborn child
- H373 May cause damage to organs through prolonged or repeated exposure
- H413 May cause long lasting harmful effects to aquatic life
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- 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
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Hungarian, 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
- Basic blue 9
- C.I. Basic Blue 9
- Chromosmon
- methylene blue
- Methylene Blue anhydrous
- Methylene Blue BB
- Methylene Blue N
- Methylthioninium chloride
- Solvent blue 8
- Swiss Blue
Frequently asked questions
What is Methylene Blue Zinc Free 82% commonly used for?
Methylene Blue is primarily used as a dye in biological stains, a redox indicator in laboratories, and in medical applications for methemoglobinemia treatment.
What is the chemical formula and molecular weight of Methylene Blue Zinc Free 82%?
The chemical formula is **C₁₆H₁₈ClN₃S**, and the molecular weight is **319.85 g/mol**.
How should Methylene Blue Zinc Free 82% be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What purity grades of Methylene Blue does Molekula supply?
Molekula supplies this product at **82% purity (zinc-free)**, suitable for most industrial and laboratory applications.
Can Molekula supply Methylene Blue Zinc Free 82% in bulk quantities?
Yes, we can provide bulk quantities of Methylene Blue Zinc Free 82%—please contact us for pricing and availability.
What documentation comes with an order of Methylene Blue Zinc Free 82%?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.