Phenolphthalein CAS 77-09-8 Brand: BJM MW:318.32 MSDS: Avaiable MF :C20H14O4 Sample: Avaiable Category: API Min order: 10grams Quality standard: Enterperise standard Place of Origin:China Usage 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. The molecule has four forms: Applications Pharmaceutical raw materials 2 More information : 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 Conclusion It comply with BP2009 and USP23

CAS NO:77-09-8

EC NO:201-004-7

Molecular Formula:C₂₀H₁₄O₄

Molecular Weight:318.3287

Synonyms:;Phenolphthalein solution;3,3-bis(p-hydroxyphenyl)phthalide;,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranore;3,3-bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one;2-[bis(4-hydroxyphenyl)methyl]benzoic acid;Phenolphthalien;

Molecular Structure:

CAS NO:77-09-8

EC NO:201-004-7

Molecular Formula:C₂₀H₁₄O₄

Molecular Weight:318.3287

Synonyms:;Phenolphthalein solution;3,3-bis(p-hydroxyphenyl)phthalide;,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranore;3,3-bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one;2-[bis(4-hydroxyphenyl)methyl]benzoic acid;Phenolphthalien;

Molecular Structure: