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連絡先担当者 Ms. Carry
No. 03 Xiaoliuzhi Lane, suzhou, Jiangsu
Phthalic
Anhydride (Other Names: Phthlandion
Phthalicacidanhydride)
CAS
No.: ******9
MF:
C8H4O3
Purity:
*9.8%min
Specification:
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
Uses: 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.
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
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:
Precursor to
dyestuffs
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.
Packaging: Inside plastic
film, outside polywoven bag
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国: | China |
モデル番号: | - |
离岸价格: | Get Latest Price |
ロケーション: | - |
最低注文量の価格: | - |
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支払いタイプ: | T/T, L/C, D/P, Western Union |
製品グループ : | organic chemicals |