p-Naphtholbenzein CAS 145-50-6

Chemical name:p-Naphtholbenzein

Synonymous names:α-Naphtholbenzein；

4′-(α-Hydroxybenzylidene)di-1-naphthol；

alpha-Naphtholbenzein

CAS No: 145-50-6

Molecular formula:C27H18O2

Molecular weight:374.43

EINECS:205-656-3

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Structural formula：

Product Description：

Test Items	Qualified product
Appearance	Dark red powder
Melting point	225-245℃
Visual transition interval	From pH 8.2(Yellow to orange ) To pH 10.0(Greenish Blue)
Maximum of absorption (in 0.01M NaOH)	0.5MAX%
Max.single impurity	644-665nm

Properties and Usage:

Compounds used as indicators in analytical chemistry. They play a great role in detecting alkaline solutions.

Storage conditions: Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down

Packing: This product is packed in 1kg aluminum foil bag or 25kg cardboard drum or customized according to customer's requirements

Organic intermediate