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Organic Indicator
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xylenol orange
chemical net
Xylenol Orange

Xylenol Orange

Xylenol Orange


Xylenol orange is an organic reagent, most commonly used as a tetrasodium salt as an indicator for metal titrations. When used for metal titrations it will appear red in the titrand and yellow once it reaches its endpoint. Historically, commercial preparations of it have been notoriously impure,sometimes consisting of as little as 20% xylenol orange, and containing large amounts of semi-xylenol orange and iminodiacetic acid. Purities as high as 90% are now available.
Synonym: 3,3′-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonephthalein tetrasodium salt

Grade:AR Grade

Purity:99% min

CAS Number :3618-43-7;63721-83-5

EC Number : 222-805-8

Molecular Formula:C31H28N2Na4O13S

Technical Requirements:


Xylenol Orange

Appearance Red-brown Crystal Powder
Ignition Residue (w/%) 30--35%
Loss on Drying(w/%) 15% max
Solubility in H2O Qualified
Sensitivity Test Qualified
Melting Point 195 °C


indicator for metal titration;
Adsorption Indicator

Packing:25g/bottle or according to your requirement.

How to buy Xylenol Orange

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