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Home > Products > Pharmaceutical Material > Pharmaceutical Intermediates > Phenolphthalein CAS 77-09-8 for Sale

Phenolphthalein CAS 77-09-8 for Sale

Phenolphthalein CAS 77-09-8 for Sale

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  • Basic Info
  • Product Description
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Basic Info

Model No.: TF-2010

Product Description

Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notation. Often used in titrations, it turns colorless in acidic solutions and pink in basic solutions. If the concentration of indicator is particularly strong, it can appear purple. In strongly basic solutions, phenolphthalein's pink color undergoes a rather slow fading reaction and becomes colorless again.

Items

Standards

Results

Characteristics

A white or almost white powder ,practically insoluble in water ,soluble in alcohol

Conform

Melting temperature

≥260℃

260.5℃~262.6℃

Identification

A Positive

B Positive

A Positive

B Positive

Appearance of solution

The solution is clear and not more intensely coloured than reference solution Y7

Complies

Related substances

Less than 0.5%

< 0.5%

Heavy metals

≤10ppm

<10ppm

Arsenic

≤8ppm

<8ppm

Acidity or Alkalinity

Complies

Complies

Chlorides

≤100ppm

<100ppm

Sulphates

≤200ppm

<200ppm

Organic volatile impurities

pass

pass

Chromatographic impurities

≤1.0%

<1.0%

Fluoran

To pass test

Complies

Loss on drying

≤0.50%

0.10%

Sulphated ash (Residue on ignition)

≤0.10%

0.02%

Assay

98.0%~101.0% (C20H14O4)

99.8%

Remark

Storage condition: Well closed container, store protected from light


























CAS 77-09-8


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