CAS Registry Number

CAS 3618-43-7 — Xylenol Orange tetrasodium salt

Xylenol Orange tetrasodium salt is a synthetic, water-soluble azo dye widely used as a metal ion indicator in complexometric titrations, particularly for calcium, magnesium, and rare earth metals. It forms vivid color changes upon binding, making it essential in analytical chemistry and industrial process monitoring. This chemical has the CAS number 3618-43-7, a molecular formula of C31H28Na4O13SN2, and a molecular weight of 760.58 g/mol. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Xylenol Orange tetrasodium salt from research to bulk quantities with full documentation and ISO 9001:2015 traceability.