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Stock Phthalic anhydride/PA crystals Assay:99% Large stock,shipped within 1 week Much experience and professional service
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.
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)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.
7.Package and Storage
Packed in 25Kg knitted plastic bag with inner plastic bag and no danger; keep in cool and dry place.
1. We have good cooperate forwarder partner,every part expense is no problem, you can confirm it before shipment.
If you're afraid of the destination expense,we can do the FOB for you.
2. We can LCL gerenal cargoes and dangerous cargoes together to help you save time,
Q: Are you a factory or trading company?
A: We are the manufacture of Vitamins and Sodium Saccharin.
For other product, we as the distributor and stockist because we have a good cooperation with our upstream &
Q: How long have you run on export trade?
A: 15 years focus on the food additivs and Vitamins, also some Fine Chemicals and API.
Q: What's your payment terms? A: We accept all payment TT,LC,DP,Paypal. But for first time, we only do LC or TT.
Q: What's your delivery time? A: Usually we will arrange the shipment in 7 -15 days.
Q: How about the packing? A: Usually we provide the packing as 25 kg / bag or carton. Of course, if you have special requirements on them,
we will according to you.
Q: How about the validity of the products? A: We ensure that the cargoes have 80% shelf life when it delivery.
Q: What documents you provide? A: Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificat and Origin certificate.
If your markets have any special requirements, let us know.