4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt

Also known as: SITS, Disodium 4-acetamido-4'-isothiocyanatostilbene-2,2'-disulfonate, Disodium 5-acetamido-2-[(E)-2-(4-isothiocyanato-2-sulfonatophenyl)ethenyl]benzenesulfonate, 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid, sodium salt, 4-Acetamido-4'-isothiocyanostilbene-2,2'-disulfonic acid disodium salt, 4-Acetylamino-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt, 5-(Acetylamino)-2-[2-(4-isothiocyanato-2-sulfophenyl)ethenyl]benzenesulfonic acid disodium salt, Benzenesulfonic acid, 5-(acetylamino)-2-[(E)-2-(4-isothiocyanato-2-sulfophenyl)ethenyl]-, sodium salt (1:2), EINECS 256-919-4, MFCD00007485

4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt (CAS 51023-76-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C17H12N2Na2O7S3 and a molecular weight of 498.461 g/mol. Key properties include a melting point of >300ºC (dec.) and a density of 1.52g/cm3. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51023-76-8
Jingsj CID: J-46817-6
Molecular Formula: C₁₇H₁₂N₂Na₂O₇S₃
Molecular Weight: 498.461 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	>300ºC (dec.)
Density	1.52g/cm3
Exact Mass	497.960205
PSA	204.71000
LogP	4.59250

GHS Safety & Compliance

Irritant / Health HazardSignal word: Danger

H302 — Harmful if swallowed
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H334 — May cause allergy or asthma symptoms if inhaled
H335 — May cause respiratory irritation

Activity & Biological Data

Additional Information	[1]. Larry Schmued, et al. Fluoro-Gold and 4-Acetamido-4’-isothiocyanostilbene-2,2’-disulfonic Acid: Use of Substituted Stilbenes in Neuroanatomical Studies. Methods in Neurosciences. Volume 3,

Frequently Asked Questions

What is the CAS number of 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt?

The CAS number of 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt is 51023-76-8.

What are the molecular formula and molecular weight of 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt?

4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt has molecular formula C17H12N2Na2O7S3 and molecular weight 498.461 g/mol.

Is 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt hazardous?

4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

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-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic acid disodium salt (CAS 51023-76-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46817-6 (accessed 2026-10-29).

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