Sudan black B

Name: Sudan black B
Brand: Vaqora Chemicals
SKU: VQ-000710

About Sudan black B

Sudan black B is a biological stain in Microscopy grade carrying the CAS registry number 4197-25-5. Its molecular formula is C29H24N6 and its molecular weight is 456.5 g/mol. The IUPAC name is (2,2-dimethyl-1,3-dihydroperimidin-6-yl)-(4-phenyldiazenylnaphthalen-1-yl)diazene. It is also known as Ceres black BN or Fat Black HB.

The material typically appears as a dark brown to very dark brown and black powder. Literature values give a melting point of 120-124 °C. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and biological staining. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 10 g, 25 g, 100 g and 1 kg packs, Sudan black B is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sudan black B
Catalogue No.	VQ-000710
CAS Number	4197-25-5
IUPAC name	(2,2-dimethyl-1,3-dihydroperimidin-6-yl)-(4-phenyldiazenylnaphthalen-1-yl)diazene
Molecular formula	C₂₉H₂₄N₆
Molecular weight	456.5 g/mol
Exact mass	456.2062
Grade	Microscopy
HSN code	32049000
InChIKey	YCUVUDODLRLVIC-UHFFFAOYSA-N
SMILES	CC1(NC2=C3C(=C(C=C2)N=NC4=CC=C(C5=CC=CC=C54)N=NC6=CC=CC=C6)C=CC=C3N1)C
PubChem CID	61336

Physical properties
Physical form	Powder
Appearance	Dark brown to very dark brown and black powder
Melting point	120-124 °C
LogP (XLogP3)	8.4
H-bond donors / acceptors	2 / 6
TPSA	73.5 Å²
Synonyms	Ceres black BN, Fat Black HB, Solvent Black 3, C.I. Solvent Black 3, Fast Black HB, Typogen Black, Lacquer Black S, Nubian Black BT, Hexatype Black B, Lacquer Black VB, Fast Black HBN, Sudan Deep Black BB

Safety & hazard information (GHS)

Health hazard

Signal word: Warning

Hazard statements

H341Suspected of causing genetic defects

Precautionary statements: P203, P280, P318, 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 Sudan black B?

The CAS Registry Number of Sudan black B is 4197-25-5. It is also known as Ceres black BN, Fat Black HB, Solvent Black 3.

What is the molecular formula and molecular weight of Sudan black B?

Sudan black B has the molecular formula C29H24N6 and a molecular weight of 456.5 g/mol. Its IUPAC name is (2,2-dimethyl-1,3-dihydroperimidin-6-yl)-(4-phenyldiazenylnaphthalen-1-yl)diazene.

Which grade and pack sizes of Sudan black B can I order?

We supply Sudan black B in Microscopy grade, in 10 g, 25 g, 100 g, 1 kg, 5 x 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Sudan black B?

Yes. Every lot of Sudan black B 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 Sudan black B be shipped internationally?

Yes. Sudan black B 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.