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Phthalic Anhydride (pa) 99.8%min Hot Sales!! Best Quality!!
- Минимальный Заказ : 10
- Минимальная Цена: 43
- Способность Поставки : 1500 Ton / Month
- Тип Платежа:L/C, T/T, Western Union
Описание Продукта
Hot Sales! Best Price! High Quality! 1 .Phthalic anhydride is the organic compound with the formula C8H4O3. This anhydride of phthalic acid, a colourless solid, is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. In 2002, approximately 4.6 billion kilograms were produced 2. Applications in industry and organic synthesis Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and cheaply available. It undergoes hydrolysis and alcoholysis. Hydrolysis by hot water forms ortho-phthalic acid. This process is reversible: Phthalic anhydride re-forms upon heating the acid above 180 °C. 3. Hydrolysis of anhydrides is not typically a reversible process. However, phthalic acid is easily dehydrated to form phthalic anhydride due to the creation of a thermodynamically favorable 5-membered ring. Organic synthesis 4 .Phthalic anhydride is a precursor to a variety of reagents useful in organic synthesis. Important derivatives include phthalimide and its many derivatives. Chiral alcohols form half-esters (see above), and these derivatives are often resolvable because they form diastereomeric salts with chiral amines such as brucine. A related ring-opening reaction involves peroxides to give the useful peroxy acid: 5. Precursor to dyestuffs 6. Phthalic anhydride is widely used in industry for the production of certain dyes. A well-known application of this reactivity is the preparation of the anthroquinone dye quinizarin by reaction with para-chlorophenol followed by hydrolysis of the chloride. 7.Package and Storage Packed in 25Kg knitted plastic bag with inner plastic bag and no danger; keep in cool and dry placeItem Index Top grade First grade Qualified product Appearance white scaly or crystalline powder white scaly or crystalline powder with slight colors molten Chroma(Chroma no. )≤ 20 50 100 thermostable Chroma(Chroma no. )≤ 50 150 - Chroma of vitriol(Chroma no. )≤ 60 100 150 crystallization point°C≥ 130.5 130.3 130.0 Purity(mass fraction)%≥ 99.80 99.50 99.00 Free acid(mass fraction)≤ % 0.20 0.30 0.50 Ash(mass fraction)%≤ 0.05 - -
Контактная Информация
- Контактное Лицо Ms. Tiya Li (General Manager)
- Компания TIANJIN ALL THE CAST METAL PRODUCT PROCESSING CO.,LTD
-
Адрес North of Xichanfang Village,Yanzhuang Town,Jinghai Dist, HEBEI DISTRICT, China
- Zip/Почтовый 057750
- Телефон 86-22-58515264
- Факс 86-22-58515264
- Мобильный -
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