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Arsenazo I

Also known as: Arsenazo I trisodium salt, Neothorin, 2-(1,8-Dihydroxy-3,6-disulfo-2-naphthylazo)benzenearsonic acid trisodium salt, 2-(o-Arsonophenylazo)-1,8-dihydroxynaphthalenedisulfonic acid trisodium salt, Arsenazo 1, Arsenazo

Arsenazo I (CAS 520-10-5) is a compound in the Nitrogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H13AsN2O11S2 and a molecular weight of 548.33300 g/mol. Key property: a melting point of ≥300ºC(lit.). No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
520-10-5
Jingsj CID
J-6784-5
Molecular Formula
C16H13AsN2O11S2
Molecular Weight
548.33300 g/mol
Category
Nitrogen Compounds
Last updated
11/3/2026
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Physicochemical Properties

Melting Point≥300ºC(lit.)
Exact Mass547.91800
PSA244.72000
LogP1.32760

Frequently Asked Questions

What is the CAS number of Arsenazo I?

The CAS number of Arsenazo I is 520-10-5.

What are the molecular formula and molecular weight of Arsenazo I?

Arsenazo I has molecular formula C16H13AsN2O11S2 and molecular weight 548.33300 g/mol.

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

Last updated:

How to cite: Jingsj. "Arsenazo I (CAS 520-10-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6784-5 (accessed 2026-11-06).

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