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| Product Name: |
Phthalic Anhydride 99.8%
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| Supply Ability: |
30000 Ton/Tons per Year |
| Related proudcts |
caustic soda, phthalic anhydride, zinc ingot, |
| Specifications |
Purity (Wt%):99.8Min |
| Price Term: |
FOB,CIF |
| Port of loading: |
TIANJIN,XINGANG |
| Minimum Order |
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| Unit Price: |
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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 ℃.
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:
C6H4(CO)2O + H2O2 ¡ú C6H4(CO3H)CO2H
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.
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| Company: |
Hangzhou teng Yang chemical co., LTD
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| Contact: |
Ms. Michell Wang |
| Address: |
Zhuluo Village, Linpu Town, Xiaoshan District |
| Postcode: |
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| Tel: |
86 571 82809525 |
| Fax: |
86 571 82809525 |
| E-mail: |
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