4,4'-Thiodianiline

Also known as: 4,4'-Diamino diphenyl sulfide, 4,4'-Sulfanediyldianiline, 4-(4-aminophenyl)sulfanylaniline, Bis(4-aminophenyl) sulfide, Benzenamine, 4,4'-thiobis-, EINECS 205-370-9, MFCD00025342

4,4'-Thiodianiline (CAS 139-65-1) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C12H12N2S and a molecular weight of 216.302 g/mol. Key properties include a melting point of 105-107 °C(lit.), a boiling point of 464.8±30.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 234.9±24.6 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H350 — May cause cancer and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 139-65-1
Jingsj CID: J-1993035-9
Molecular Formula: C₁₂H₁₂N₂S
Molecular Weight: 216.302 g/mol
Category: Ethers
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	105-107 °C(lit.)
Boiling Point	464.8±30.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	234.9±24.6 °C
Exact Mass	216.072113
PSA	77.34000
LogP	2.18
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.707

GHS Safety & Compliance

Irritant / Health Hazard / Environmental HazardSignal word: Danger

H302 — Harmful if swallowed
H350 — May cause cancer
H411 — Toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of 4,4'-Thiodianiline?

The CAS number of 4,4'-Thiodianiline is 139-65-1.

What are the molecular formula and molecular weight of 4,4'-Thiodianiline?

4,4'-Thiodianiline has molecular formula C12H12N2S and molecular weight 216.302 g/mol.

Is 4,4'-Thiodianiline hazardous?

4,4'-Thiodianiline has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H350 — May cause cancer; H411 — Toxic to aquatic life with long lasting effects.

What are the upstream and downstream products of 4,4'-Thiodianiline?

For 4,4'-Thiodianiline, Upstream Products: 4-Iodoaniline, 4-Aminothiophenol, Bis(4-nitrophenyl) sulfide; Downstream Products: Bis(4-isothiocyanatophenyl)sulfone, Diphenyl sulfide, 4,4'-Diaminodiphenylsulfone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "4,4'-Thiodianiline (CAS 139-65-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993035-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.