Neisser's stain A

Name: Neisser's stain A
Brand: Vaqora Chemicals
SKU: VQ-003605

About Neisser's stain A

Vaqora Chemicals supplies Neisser's stain A, a diagnostic reagent registered under CAS number 122965-43-9. With the molecular formula C16H20ClN3OS, it has a molar mass of 337.9 g/mol. Systematically, it is named [7-(dimethylamino)phenothiazin-3-ylidene]-dimethylazanium. Chloride. Hydrate. Common synonyms include Methylene Blue hydrate and Methylene Blue monohydrate.

The product is provided as a liquid. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

Typical applications include clinical chemistry, diagnostic assays, pathology laboratories and biological staining. It is used across academic and industrial research and diagnostics and biotechnology.

Vaqora Chemicals supplies Neisser's stain A in 125 mL, 500 mL and 5 L packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Clinical chemistry
Diagnostic assays
Pathology laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Neisser's stain A
Catalogue No.	VQ-003605
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
HSN code	38229090
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	Liquid
Appearance	Liquid
H-bond donors / acceptors	1 / 5
TPSA	44.9 Å²
Synonyms	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), 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride hydrate, Phenothiazin-5-ium, 3,7-bis(dimethylamino)-, chloride, monohydrate, Phenothiazin-5-ium, 3,7-bis(dimethylamino)-, chloride, hydrate (1:1:1)

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

Microscopy

Methylene blue

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

VQ-000631

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

Frequently asked questions

What is the CAS number of Neisser's stain A?

The CAS Registry Number of Neisser's stain A is 122965-43-9. It is also known as Methylene Blue hydrate, Methylene Blue monohydrate, Basic Blue 9 monohydrate.

What is the molecular formula and molecular weight of Neisser's stain A?

Neisser's stain A has the molecular formula C16H20ClN3OS and a molecular weight of 337.9 g/mol.

Which grade and pack sizes of Neisser's stain A can I order?

We supply Neisser's stain A, in 125 mL, 500 mL, 5 L packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Neisser's stain A?

Yes. Every lot of Neisser's stain A 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 Neisser's stain A be shipped internationally?

Yes. Neisser's stain A 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.