phthalic anhydride

• Post Date:

  Dec 17,2019

• Expiry Date:

  Dec 16,2020

• Detailed Description:

  Cas No. :85-44-9 Price:1000 USD Metric Tons
  Payment Method: L/C,T/T
  Detailed Product Description
  
  
  phthalic anhydride
  1.Good quanlity and
  2.the manufacture of plasticizers, alkydresins
  3.Phthalic Anhydride
  4. SGS ,BV TE
  
  
  phthalic anhydride
  
  
  
  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:
  
  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.
  
  

• CAS Registry Number:

  85-44-9

• Synonyms:

  ;2,5-Isobenzofurandione;2-benzofuran-1,3-dione;2,2'-(oxydicarbonyl)dibenzoic acid;o-Phthalic anhydride;

• Molecular Formula:

  C₈H₄O₃

• Molecular Weight:

  148.12

• Molecular Structure:

  

• Hazard Symbols:

   Xn:Harmful;
  

• Risk Codes:

  R22:;
  R37/38:;
  R41:;
  R42/43:;
  

• Safety Description:

  S22:;
  S24/25:;
  S26:;
  S37/39:;
  S46:;
  

• Company:

  Shanxi Solid Industrial Co,. Ltd.     [ China ]        

• Contact:

  Binbin Zhang

• Tel:

  0086-351-8390369

• Fax:

  0086-351-8390339

• Email:

  info@cnsolid.com