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Chemical structure of 4,4’-Thiobisbenzenethiol | 19362-77-7
CAS: 19362-77-7
SKU: S1936
4,4’-Thiobisbenzenethiol | SKU: S1936
Synonyms: Bis(4-mercaptophenyl) sulfide
Chemical structure of 4,4’-Thiobisbenzenethiol | 19362-77-7
4,4′-Thiobisbenzenethiol (CAS 19362-77-7) is a bifunctional aromatic dithiol that Sarchem Labs supplies as a crystalline powder for use as a monomer and synthetic intermediate, particularly in dye chemistry. Its structure — two thiophenol groups linked through a central sulfur bridge — gives it two reactive thiol sites per molecule, making it useful for building larger sulfur-containing aromatic structures. Sarchem Labs backs every lot with a Certificate of Analysis and Safety Data Sheet so customers can confirm identity and purity ahead of use. It is primarily supplied into specialty dye and intermediate synthesis applications requiring a difunctional aromatic thiol building block.
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Specifications

Boiling Point148°C
Melting Point112–114 °C (lit.)
ColorUndesignated
Linear FormulaS(C6H4SH)2
Formula Weight250.39
Physical FormCrystalline powder
Chemical Name or Material4,4′-Thiobisbenzenethiol
Molecular Formula250.39–250.40 g/mol
Molecular Weight250.39–250.40 g/mol
SMILES String`Sc1ccc(Sc2ccc(S)cc2)cc1`
Assay98%
CAS Number19362-77-7
NACRESNA.23
PubChem Substance ID24864661
UNSPSC Code12162002
MDL NumberMFCD00142119
Quality Segment100
InChI`1S/C12H10S3/c13-9-1-5-11(6-2-9)15-12-7-3-10(14)4-8-12/h1-8,13-14H`
InChI KeyJLLMOYPIVVKFHY-UHFFFAOYSA-N

Applications

Monomer for sulfur-containing polymer and specialty-material synthesis
Intermediate for dye manufacturing
Building block for further functionalization via its two reactive thiol groups

Product Description

What is 4,4′-Thiobisbenzenethiol?

4,4′-Thiobisbenzenethiol is an aromatic dithiol consisting of two thiophenol (benzenethiol) units joined through a central sulfide (–S–) bridge, giving the molecule the structure of two reactive –SH groups positioned at opposite ends of a symmetric aromatic scaffold. This bifunctionality is what makes the compound valuable as a monomer: each thiol group can independently react with electrophiles, allowing the molecule to serve as a linking unit in larger sulfur-containing structures. Supplied by Sarchem Labs as a 98%-assay crystalline powder with a melting point of 112–114 °C, it offers a well-defined, reproducible starting material for downstream synthesis.

Uses of 4,4′-Thiobisbenzenethiol

The primary documented use of 4,4′-thiobisbenzenethiol is as a monomer and intermediate in dye synthesis, where its two thiol groups allow it to be incorporated into extended conjugated or polymeric structures. Its difunctional aromatic thiol chemistry also makes it broadly useful as a building block anywhere a symmetric, sulfur-bridged bis-thiophenol unit is needed in specialty organic synthesis.

Safety Information

  •       Signal Word: Warning
  •       GHS Pictogram: GHS07 (Exclamation Mark)
  •       Hazard Statements: H315 (Causes skin irritation), H319 (Causes serious eye irritation), H335 (May cause respiratory irritation)
  •       Precautionary Statements: P261, P264, P271, P280, P302+P352, P305+P351+P338
  •       Hazard Classifications: Eye Irritation Category 2, Skin Irritation Category 2, STOT Single Exposure Category 3
  •       Target Organs: Respiratory system
  •       Storage Class: 11 – Combustible Solids
  •       Water Hazard Class (WGK): 3
  •       Recommended PPE: Dust mask (type N95, US), eye shields, gloves

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FAQs: 4,4’-Thiobisbenzenethiol

It is used mainly as a monomer and intermediate in dye synthesis, where its two reactive thiol groups allow it to be incorporated into larger sulfur-containing aromatic structures.

It means the molecule has two separate, independently reactive thiol (–SH) groups, one on each aromatic ring, which lets chemists use it to link or bridge other molecules from both ends rather than just one.

Yes — it carries skin irritation, eye irritation, and respiratory irritation hazard statements (H315, H319, H335), so it should be handled with gloves, eye protection, and a dust mask, particularly when weighing or transferring the powder.

It is also known as bis(4-mercaptophenyl) sulfide, a name that directly describes its structure — two mercaptophenyl (thiophenol) groups joined by a sulfide bridge.

As a Storage Class 11 combustible solid, it should be kept in a tightly sealed container in a cool, dry area away from ignition sources.