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Minimum Order
Place of Origin:
China
Price for Minimum Order:
-
Minimum Order Quantity:
10 Metric Ton
Packaging Detail:
25Kg knitted plastic bag with inner plastic bag 20MT/20'FCL
Delivery Time:
within 7 days after received the deposit or L/C
Supplying Ability:
1500 Ton per Month
Payment Type:
T/T, L/C
Persona de contacto rzan04-cn.ada.064523
North of Xichanfang Village,Yanzhuang Town,Jinghai Dist, TIANJIN, HEBEI DISTRICT
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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 ***2, 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 **0 °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 *-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 → C6H4(CO3H)CO2H5. 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.
| Item | 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. )≤ | *0 | *0 | **0 |
| thermostable Chroma(Chroma no. )≤ | *0 | **0 | - |
| Chroma of vitriol(Chroma no. )≤ | *0 | **0 | **0 |
| crystallization point°C≥ | **0.5 | **0.3 | **0.0 |
| Purity(mass fraction)%≥ | *9.*0 | *9.*0 | *9.*0 |
| Free acid(mass fraction)≤ % | 0.*0 | 0.*0 | 0.*0 |
| Ash(mass fraction)%≤ | 0.*5 | - | - |
7.Package and Storage
Packed in *5Kg knitted plastic bag with inner plastic bag and no danger; keep in cool and dry place
