Molekula
Methyl green (C.I.42590)
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
Methyl green (C.I. 42590) is a cationic triarylmethane dye primarily used as a biological stain in histology, particularly for differentiating cell nuclei in tissue samples. It binds to nucleic acids, providing contrast for microscopic examination. This chemical has a CAS number of 7114-03-6, with the molecular formula C27H35BrClN3 · ZnCl2 and a molecular weight of 653.24. It should be stored at ambient conditions and carries the signal word Danger, with hazard statements H314 (causes severe skin burns and eye damage), H335 (may cause respiratory irritation) and H411 (toxic to aquatic life with long lasting effects). Molekula supplies Methyl green 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.
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25 g — £76.20 per pack ex VAT · £91.44 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Grey/ blue crystalline powder |
| Dye Content | ≥ 65.0% |
| Absorption maxima | 630 - 635nm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 0 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 11327043 |
| CAS Number | 7114-03-6 |
| IUPAC Name | dichlorozinc;[4-[[4-(dimethylamino)phenyl]-(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]phenyl]-ethyl-dimethylazanium;bromide;chloride |
| EC Number | 230-415-4 |
| Molecular Formula | C27H35BrClN3 · ZnCl2 |
| Molecular Weight | 653.24 |
| Exact Mass | 649.0371 |
| SMILES | CC[N+](C)(C)C1=CC=C(C=C1)C(=C2C=CC(=[N+](C)C)C=C2)C3=CC=C(C=C3)N(C)C.[Cl-].Cl[Zn]Cl.[Br-] |
| InChIKey | RRKSQWOQZFIQKW-UHFFFAOYSA-J |
| InChI | InChI=1S/C27H35N3.BrH.3ClH.Zn/c1-8-30(6,7)26-19-13-23(14-20-26)27(21-9-15-24(16-10-21)28(2)3)22-11-17-25(18-12-22)29(4)5;;;;;/h9-20H,8H2,1-7H3;4*1H;/q+2;;;;;+2/p-4 |
| PubChem CID | 16211442 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| HTS Code | 3212.9000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H314 Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P271 Use only outdoors or in a well-ventilated area
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+P361+P353 IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
- P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do, continue rinsing
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.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Methyl Green (C.I. 42590) commonly used for?
Methyl Green is primarily used as a biological stain in histology for differentiating cell components, particularly in nuclear staining alongside other dyes like eosin.
What is the chemical formula and molecular weight of Methyl Green?
The formula is C₂₇H₃₅BrClN₃·ZnCl₂, and the molecular weight is 653.24 g/mol.
How should Methyl Green be stored?
Store Methyl Green at ambient temperature in a dry, well-ventilated area, away from incompatible substances.
What grades or purity levels of Methyl Green does Molekula supply?
Molekula supplies Methyl Green in analytical and reagent-grade purity, suitable for laboratory and histological applications.
Can Molekula supply Methyl Green in bulk quantities?
Yes, Molekula can provide Methyl Green in bulk, with custom packaging options available upon request.
What documentation comes with an order of Methyl Green?
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.