Bismark brown R

Name: Bismark brown R
Brand: Vaqora Chemicals
SKU: VQ-000501

About Bismark brown R

Vaqora Chemicals supplies Bismark brown R in Microscopy grade, a biological stain registered under CAS number 5421-66-9. With the molecular formula C21H26Cl2N8, it has a molar mass of 461.4 g/mol. Common synonyms include Basic Brown 4 and Vesuvine.

The product is provided as a powder. Key physical data: a melting point of 222 °C (dec.). Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and dyes and pigments manufacture. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Bismark brown R in 25 g, 100 g, 1 kg and 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Dyes & pigments manufacture

Industries

Specifications & identifiers

Chemical identifiers
Product name	Bismark brown R
Catalogue No.	VQ-000501
CAS Number	5421-66-9
IUPAC name	4-[[3-[(2,4-diamino-5-methylphenyl)diazenyl]-4-methylphenyl]diazenyl]-6-methylbenzene-1,3-diamine;dihydrochloride
Molecular formula	C₂₁H₂₆Cl₂N₈
Molecular weight	461.4 g/mol
Exact mass	460.1657
Grade	Microscopy
HSN code	32129090
InChIKey	WLKAMFOFXYCYDK-UHFFFAOYSA-N
SMILES	CC1=C(C=C(C=C1)N=NC2=C(C=C(C(=C2)C)N)N)N=NC3=C(C=C(C(=C3)C)N)N.Cl.Cl
PubChem CID	79459

Physical properties
Physical form	Powder
Appearance	Powder
Melting point	222 °C (dec.)
H-bond donors / acceptors	6 / 8
TPSA	154 Å²
Synonyms	Basic Brown 4, Vesuvine, Bismarck Brown R, Astra Vesuvine B, Basic Brown 2K, 2,4-Bis(2,4-diamino-5-methyl-1-benzenazo)toluene, C.I. Basic Brown 4, dihydrochloride, Bismarck Brown TSS, Bismarck Brown RLNS, 1,3-Benzenediamine, 4,4'-((4-methyl-1,3-phenylene)bis(azo))bis(6-methyl-, dihydrochloride, 1,3-Benzenediamine, 4,4'-[(4-methyl-1,3-phenylene)bis(azo)]bis[6-methyl-, dihydrochloride, C.I. Basic Brown 4, dihydrochloride (8CI)

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H312Harmful in contact with skin
H315Causes skin irritation

Precautionary statements: P264, P280, P302 + P352, P317, P321, P332 + P317, P362 + P364, 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 5421-66-9

Spectroscopy

Bismark brown R, for spectroscopy 40%

CAS: 5421-66-9
Formula: C₂₁H₂₆Cl₂N₈
MW: 461.4 g/mol

VQ-046146

Frequently asked questions

What is the CAS number of Bismark brown R?

The CAS Registry Number of Bismark brown R is 5421-66-9. It is also known as Basic Brown 4, Vesuvine, Bismarck Brown R.

What is the molecular formula and molecular weight of Bismark brown R?

Bismark brown R has the molecular formula C21H26Cl2N8 and a molecular weight of 461.4 g/mol.

Which grade and pack sizes of Bismark brown R can I order?

We supply Bismark brown R 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 Bismark brown R?

Yes. Every lot of Bismark brown R 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 Bismark brown R be shipped internationally?

Yes. Bismark brown R 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.