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
Rich experience in export and strong logistical support.
Good relationship with many large domestic pharmaceutical factory.
Perfect service, perfect supply chain.
Company Information
BJM Pharmaceutical Chemical Co., Ltd is located in Wuhan City, Hubei Province, China. We engage in the research, synthesis and distribution of pharmaceutical materials, intermediates and fine chemicals.
We have our own factory and R&D labs in Shandong and Hubei Province, and specialized in producing API intermediates, Liquid crystal materials,Amino acid derivative and UV absorber.With the mature location market, our products have exported to the international market such as Europe, North American, Southeast Asia and so on.
