Product Description
| Chemical Name | Phenlphthalein |
| Synonyms | 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one;1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl |
| CAS NO. | 77-09-8 | Purity | 99% |
| Appearance | Powder | Application | Pharmaceutical intermediates |
| Molecular Formula | C20H14O4 | Molecuar Weight | 318.32300 |
| Boiling Point | 548.7ºC at 760 mmHg | Melting Point | 258-263 °C |
| PSA | 66.76000 | LOGP | 3.56010 |
| N/AStorage Condition | Keep in a cool and dry place |
| Production Capacity | 10tons/month |
| MOQ | 1kg |
| Packaging | 1kg/bottle, 25kg drum |
| Transportation | By Sea or by Air(DHL/UPS/TNT/FEDEX/EMS) |
| Port | Tianjin, Shanghai or any port in China |
| Delivery Time | 5-15 days |
| Payment | T/T, Western Union or Bitcoin |
| Packaging Details | 1kg or 5kgs/Aluminium bag,
25kgs/drum,
25 tons/20ft
Packing as your request, with photos before delivery.
Our professional forwarder could confirm goods arrives you without custom problems. |
| shipping | Within 7 working days upon the receipt of payment. |
Phenophthalein is a weak organic acid with a molecular formula of C20H14O4 and a simplified structural formula of (C6H4OH)2COC6H4CO. It is a colorless lactone structure in a solution with pH <8.2, and a pink quinone structure when pH> 8.2. It is a commonly used acid-base indicator. The quinoid or quinoid acid salt of phenophthalein is very unstable in alkaline medium. It will slowly transform into a colorless carboxylate form; it will immediately transform into a colorless carboxylic acid when encountering a thicker lye Salt style. Therefore, when the phenlphthalein reagent is dripped into the concentrated lye, the phenlphthalein starts to turn red, and the red fades quickly and becomes colorless. Phenophthalein is colorless when the pH is less than 8.2 to 0, and shows orange-yellow in strong acid.
Phenophthalein is a small white or slightly yellow crystal, which is hardly soluble in water but easily soluble in alcohol. Therefore, phenophthalein is usually formulated into an alcohol solution for use. When the phenophthalein reagent is dripped into water or a neutral, acidic aqueous solution, white turbidity will appear. This is because alcohol is easily soluble in water, and phenophthalein, which is hardly soluble in water, precipitates out in the reagent. Phenophthalein is produced by the condensation of phthalic anhydrid and two molecules of pheno in the presence of concentrated sulfuric acid heating. This method was discovered by Adolf von Bayer in 1871.
USAGE Acid-base indicator, non-aqueous titration indicator, chromatographic analysis; medical laxative, can stimulate the intestinal wall, cause intestinal peristalsis and promote defecation.We guarantee that 100% of your parcel passes through the United States, Britain, Australia, Canada, Mexico, France, Germany, Spain, Belgium, Sweden, Poland, and Russia. We have large stocks in warehouses in the United States, Canada, Germany, and Mexico, and we can ship directly from overseas warehouses.We have powerful customs clearance agencies in these countries, and our customs clearance company will clear your parcel without any customs issues, sometimes even 1000 kg. Door to door service DDP service. To ensure 100% receipt of your package, if there are any customs issues, we are willing to reissue your package free of charge. Let you have a good experience of our strong shipping capabilities.
We have many customers in the United States, Canada, Mexico, Australia, United Kingdom, and European Union countries and retain long-term cooperation. Provide a large number of high-quality products. They made a lot of money. I am sure we can make more money together. There is money to have glory.
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