Molekula
Azure II
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
Azure II is a phenothiazine (thiazine) dye mixture, a 1:1 blend of Azure B and Methylene Blue (C.I. 52010/52015), used as a biological stain and as a component of Giemsa-type and Romanowsky stains for blood and tissue staining. This high-purity reagent is available as a solid powder with a CAS number of 37247-10-2, a molecular formula of C16H18N3S·C15H16N3S·2Cl, and a molecular weight of 625.68 g/mol. It requires ambient storage and carries a signal word of "Warning" for safety. Molekula supplies Azure II 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.
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 — £49.30 per pack ex VAT · £59.16 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 green powder |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 80592643 |
| CAS Number | 37247-10-2 |
| IUPAC Name | [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;dimethyl-[7-(methylamino)phenothiazin-3-ylidene]azanium;dichloride |
| Molecular Formula | C16H18N3S · C15H16N3S ·2 Cl |
| Molecular Weight | 625.68 |
| Exact Mass | 624.1663 |
| SMILES | CNC1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.[Cl-].[Cl-] |
| InChIKey | YOWZJZJLXUQHGF-UHFFFAOYSA-M |
| InChI | InChI=1S/C16H18N3S.C15H15N3S.2ClH/c1-18(2)11-5-7-13-15(9-11)20-16-10-12(19(3)4)6-8-14(16)17-13;1-16-10-4-6-12-14(8-10)19-15-9-11(18(2)3)5-7-13(15)17-12;;/h5-10H,1-4H3;4-9H,1-3H3;2*1H/q+1;;;/p-1 |
| PubChem CID | 16218618 |
| REACH Code | Y110 |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
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
- 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, Italian, Russian, 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
- 3-Chloro-6-hydroxy-2-Pyridinecarboxylic acid
- Azur II
- Azure
- Azure B-Methylene Blue Mixture (1:1)
- Azure II, powder
- C.I. 52010/52015
- Methylene Azure II
- XHDUSHSYEOGBGJ-UHFFFAOYSA-L
Frequently asked questions
What is Azure II used for?
Azure II is used as a histological and hematological stain, notably as a component of Giemsa-type and Romanowsky stains for blood and tissue staining, and as a dye in various biochemical applications.
What is the chemical formula and molecular weight of Azure II?
The chemical formula is C16H18N3S · C15H16N3S · 2Cl, and the molecular weight is 625.68 g/mol.
What is the hazard classification and storage recommendation for Azure II?
Azure II has a signal word of 'Warning' and should be stored at ambient temperature in a dry, well-ventilated area, away from incompatible substances.
Does Molekula offer Azure II in bulk quantities?
Yes, Molekula can supply Azure II in bulk, with quantities tailored to your specific requirements—please contact us for pricing and availability.
What documentation comes with an order of Azure II?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet for reference.
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.