Biebrich scarlet

Name: Biebrich scarlet
Brand: Vaqora Chemicals
SKU: VQ-000498

About Biebrich scarlet

Biebrich scarlet is a biological stain (Microscopy grade) carrying the CAS registry number 4196-99-0. The compound has the formula C22H14N4Na2O7S2, corresponding to a molecular weight of 556.5 g/mol. The IUPAC name is disodium, 2-[(2-hydroxynaphthalen-1-yl)diazenyl]-5-[(4-sulfonatophenyl)diazenyl]benzenesulfonate. Alternative names: Acid Red 66 and Biebrich scarlet WS.

In its supplied form it is a red to brown 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.

It is commonly used for histology and cytology staining, microscopy and clinical laboratories. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 25 g, 100 g, 1 kg and 25 kg packs, Biebrich scarlet is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Biebrich scarlet
Catalogue No.	VQ-000498
CAS Number	4196-99-0
IUPAC name	disodium;2-[(2-hydroxynaphthalen-1-yl)diazenyl]-5-[(4-sulfonatophenyl)diazenyl]benzenesulfonate
Molecular formula	C₂₂H₁₄N₄Na₂O₇S₂
Molecular weight	556.5 g/mol
Exact mass	556.0099
Grade	Microscopy
HSN code	32049000
InChIKey	VVAVKBBTPWYADW-UHFFFAOYSA-L
SMILES	C1=CC=C2C(=C1)C=CC(=C2N=NC3=C(C=C(C=C3)N=NC4=CC=C(C=C4)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+]
PubChem CID	20170

Physical properties
Physical form	Powder
Appearance	Red to brown powder
H-bond donors / acceptors	1 / 11
TPSA	201 Å²
Synonyms	Acid Red 66, Biebrich scarlet WS, Biebrich scarlet sodium salt, Ponceau BS, Acid Scarlet BA, Croceine scarlet, Fast Scarlet BA, Fenazo Scarlet B, Scarlet 3B, C.I. Acid Red 66, Imperial Scarlet 3B, Imperial Scarlet 3BN

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P317, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, 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

Frequently asked questions

What is the CAS number of Biebrich scarlet?

The CAS Registry Number of Biebrich scarlet is 4196-99-0. It is also known as Acid Red 66, Biebrich scarlet WS, Biebrich scarlet sodium salt.

What is the molecular formula and molecular weight of Biebrich scarlet?

Biebrich scarlet has the molecular formula C22H14N4Na2O7S2 and a molecular weight of 556.5 g/mol.

Which grade and pack sizes of Biebrich scarlet can I order?

We supply Biebrich scarlet 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 Biebrich scarlet?

Yes. Every lot of Biebrich scarlet 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 Biebrich scarlet be shipped internationally?

Yes. Biebrich scarlet 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.