Molekula
Methylene blue hydrate
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 hydrate is a synthetic phenothiazine dye with antimicrobial, antioxidant, and metabolic properties, widely used in biological staining, medical diagnostics, and wastewater treatment. It appears as a deep blue-green crystalline powder soluble in water and alcohol. Catalogue details: CAS 122965-43-9, molecular formula C16H18ClN3S · xH2O, molecular weight 319.85 g/mol, stored at ambient conditions. Molekula supplies Methylene blue hydrate 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 | Green crystalline powder |
| Loss on Drying | ≤15% |
| Assay | ≥98.5% |
| Residue on Ignition | ≤0.5% |
| Solubility test in ethanol | Conforms to specification |
| Colour range of indicator | Conforms to specification |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90027331 |
| CAS Number | 122965-43-9 |
| IUPAC Name | [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;chloride;hydrate |
| Molecular Formula | C16H18ClN3S · xH2O |
| Molecular Weight | 319.85 |
| Exact Mass | 337.1016 |
| SMILES | CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.O.[Cl-] |
| InChIKey | WQVSELLRAGBDLX-UHFFFAOYSA-M |
| InChI | InChI=1S/C16H18N3S.ClH.H2O/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;1H2/q+1;;/p-1 |
| PubChem CID | 16211647 |
| REACH Code | Y113 |
| Tariff Code | 3204130090 |
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
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- 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
- P501 Dispose of contents/container to an approved waste disposal plant
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
- [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;chloride;hydrate
- 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride hydrate
- 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride hydrate(1:1:x)
- 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride xhydrate
- Basic Blue 9 monohydrate
- C.I 52015
- C.i. basic Blue 9 monohydrate
- Methylene Blue monohydrate
- Phenothiazin-5-ium, 3,7-bis(dimethylamino)-, chloride, hydrate (1:1:3)
- Phenothiazin-5-ium, 3,7-bis(dimethylamino)-, chloride, monohydrate
Frequently asked questions
What is methylene blue hydrate commonly used for?
Methylene blue hydrate is primarily used as a dye in biological and chemical staining, a redox indicator in laboratories, and in medical applications for methemoglobinemia treatment.
What is the chemical formula and molecular weight of methylene blue hydrate?
The chemical formula is **C₁₆H₁₈ClN₃S · xH₂O** and the anhydrous molecular weight is **319.85 g/mol** (varies slightly with hydration level).
How should methylene blue hydrate be stored?
Store at **ambient temperature** in a tightly sealed container, protected from light and moisture to maintain stability.
What purity grades are available for methylene blue hydrate?
We supply **analytical grade** (high purity for lab use) and **technical grade** (for industrial applications).
Can Molekula supply methylene blue hydrate in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5 kg, 25 kg, and larger quantities) for both analytical and technical grades.
What documentation is provided with an order of methylene blue hydrate?
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.