Bismuthiol-II

About Bismuthiol-II

Bismuthiol-II is an indicator carrying the CAS registry number 6336-51-2. With the molecular formula C8H5KN2S3, it has a molar mass of 264.4 g/mol. Systematically, it is named potassium 4-phenyl-5-sulfanylidene-1,3,4-thiadiazole-2-thiolate. Common synonyms include Bizmuthiol II and C8H5KN2S3.

It is supplied as a powder. Keep the container tightly sealed and store it in a cool, dry area. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span titration end-point detection, pH determination, analytical testing and pharmaceutical synthesis. Buyers come mainly from academic and industrial research and pharmaceutical manufacturing.

We offer Bismuthiol-II in 10 g, 100 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Titration end-point detection
pH determination
Analytical testing
Pharmaceutical synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Bismuthiol-II
Catalogue No.	VQ-000322
CAS Number	6336-51-2
IUPAC name	potassium 4-phenyl-5-sulfanylidene-1,3,4-thiadiazole-2-thiolate
Molecular formula	C₈H₅KN₂S₃
Molecular weight	264.4 g/mol
Exact mass	263.9252
HSN code	29349900
InChIKey	QSKDCVGFAPHSHX-UHFFFAOYSA-M
SMILES	C1=CC=C(C=C1)N2C(=S)SC(=N2)[S-].[K+]
PubChem CID	2775614

Physical properties
Physical form	Powder
Appearance	Powder
H-bond donors / acceptors	0 / 4
TPSA	74 Å²
Synonyms	5-Mercapto-3-phenyl-1,3,4-thiodiazole-2(3H)-thione potassium salt, 1,3,4-Thiadiazolidine-2,5-dithione, 3-phenyl-, potassium salt, 5-Mercapto-3-phenyl-1,3,4-thiadiazole-2(3H)-thione, potassium salt, potassium 4-phenyl-5-thioxo-4,5-dihydro-1,3,4-thiadiazole-2-thiolate, 5-Mercapto-3-phenyl-1,3,4-thiadiazole-2(3H)thione potassium salt, potassium (4-phenyl-5-sulfanylidene-4,5-dihydro-1,3,4-thiadiazol-2-yl)sulfanide, Bizmuthiol II, 2,5-Dimercapto-4-phenyl-1,3,4-thiadiazole potassium salt, C8H5KN2S3, 3-phenyl-5-sulfanyl-1,3,4-thiadiazole-2-thione, 5-Mercapto-3-phenyl-2H-1,3,4-thiadiazole-2-thione

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
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 Bismuthiol-II?

The CAS Registry Number of Bismuthiol-II is 6336-51-2. It is also known as 5-Mercapto-3-phenyl-1,3,4-thiodiazole-2(3H)-thione potassium salt, 1,3,4-Thiadiazolidine-2,5-dithione, 3-phenyl-, potassium salt, 5-Mercapto-3-phenyl-1,3,4-thiadiazole-2(3H)-thione, potassium salt.

What is the molecular formula and molecular weight of Bismuthiol-II?

Bismuthiol-II has the molecular formula C8H5KN2S3 and a molecular weight of 264.4 g/mol. Its IUPAC name is potassium 4-phenyl-5-sulfanylidene-1,3,4-thiadiazole-2-thiolate.

Which grade and pack sizes of Bismuthiol-II can I order?

We supply Bismuthiol-II, in 10 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Bismuthiol-II?

Yes. Every lot of Bismuthiol-II 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 Bismuthiol-II be shipped internationally?

Yes. Bismuthiol-II 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.