phthalic anhydride
Inquiry
| 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 |
-
Disclaimer statement:The information and data included above have been realized by the enterprises and compiled by the staff, and are subject to change without notice to you. The Chemnet makes no warranties or representations whatsoever regarding the facticity, accuracy and validity of such information and data. In order to ensure your interest, we suggest you chose the products posted by our gold suppliers or VIP members.
