Methylene blue

Name: Methylene blue
Brand: Vaqora Chemicals
SKU: VQ-000631

About Methylene blue

Vaqora Chemicals supplies Methylene blue in Microscopy grade, a biological stain registered under CAS number 122965-43-9. With the molecular formula C16H20ClN3OS, it has a molar mass of 337.9 g/mol. Its systematic (IUPAC) name is [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium. Chloride. Hydrate. It is also known as Basic Blue 9 or Tetramethylthionine chloride.

In its supplied form it is a dark green to very dark green powder. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and biological staining. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Vaqora Chemicals supplies Methylene blue in 25 g, 100 g, 1 kg and 25 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Methylene blue
Catalogue No.	VQ-000631
CAS Number	122965-43-9
IUPAC name	[7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium;chloride;hydrate
Molecular formula	C₁₆H₂₀ClN₃OS
Molecular weight	337.9 g/mol
Exact mass	337.1016
Grade	Microscopy
HSN code	32041351
InChIKey	WQVSELLRAGBDLX-UHFFFAOYSA-M
SMILES	CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.O.[Cl-]
PubChem CID	16211647

Physical properties
Physical form	Powder
Appearance	Dark green to very dark green powder
H-bond donors / acceptors	1 / 5
TPSA	44.9 Å²
Synonyms	3,7-bis(Dimethylamino)phenazathionium chloride, Basic Blue 9, Tetramethylthionine chloride, Methylene Blue hydrate, Methylene Blue monohydrate, Basic Blue 9 monohydrate, Methylene Blue (hydrate), C.i. basic Blue 9 monohydrate, 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride hydrate(1:1:x), 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride xhydrate, Phenothiazin-5-ium, 3,7-bis(dimethylamino)-, chloride, hydrate (1:1:3)

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 122965-43-9

AR

Methylene blue, GR

CAS: 122965-43-9
Formula: C₁₆H₂₀ClN₃OS
MW: 337.9 g/mol

VQ-000632

Methylene blue, hydrate, ≥95%

CAS: 122965-43-9
Formula: C₁₆H₂₀ClN₃OS
MW: 337.9 g/mol

VQ-000633

Neisser's stain A

CAS: 122965-43-9
Formula: C₁₆H₂₀ClN₃OS
MW: 337.9 g/mol

VQ-003605

Frequently asked questions

What is the CAS number of Methylene blue?

The CAS Registry Number of Methylene blue is 122965-43-9. It is also known as 3,7-bis(Dimethylamino)phenazathionium chloride, Basic Blue 9, Tetramethylthionine chloride.

What is the molecular formula and molecular weight of Methylene blue?

Methylene blue has the molecular formula C16H20ClN3OS and a molecular weight of 337.9 g/mol.

Which grade and pack sizes of Methylene blue can I order?

We supply Methylene blue in Microscopy grade, in 25 g, 100 g, 1 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Methylene blue?

Yes. Every lot of Methylene blue is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Methylene blue be shipped internationally?

Yes. Methylene blue is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.