phthalic anhydride


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phthalic anhydride

n.
A white crystalline compound prepared by oxidizing naphthalene and used in the manufacture of phthaleins and other dyes.
References in periodicals archive ?
Synthesis of C-HP was carried out by reacting the polyol (0.045 mol) with phthalic anhydride (0.54 mol), pTSA (0.003 mol), and xylene (50 ml) in a four-necked round bottom flask fitted with nitrogen inlet, thermometer, and mechanical stirrer.
Mechanistically, the reaction is believed to take place via the initial opening of phthalic anhydride and formation of an amide intermediate via nucleophilic attack of -NH2.
The increase in sales in CM&C was due to higher foreign currency translation, incremental sales from the March 2010 acquisition in The Netherlands, higher sales volumes of carbon pitch, carbon black feedstock and carbon black, and higher prices for phthalic anhydride and carbon black feedstock.
However, the ratings are constrained by the risks associated with the cyclical nature of business, the vulnerability of the profitability to volatility in the spread between Phthalic Anhydride (PAN) and O-Xylene (OX), the decline in import duty levels and the significant import competition.
Also Sorokin (1968) who studied the reaction of equimolar amounts of phenyl glycidyl ether, phthalic anhydride and n-butyl alcohol arrived at the same results.
Most recently, he led DC Chemical's business, including products such as coal tar chemicals, BTX, phthalic anhydride and carbon black, among others.
For vertical integration the company has a production facility for two key raw materials: pentaerythritol and phthalic anhydride.
The Phthalic Anhydride (n =16 experimental, 16 control; Dose 0.68 mM/5ul/embryo) or Diisobutyl Phthalate (n=16 experimental, 17 control; Dose 15 ug/5ul/embryo) was administered and the embryos were observed for the next 4-5 days.
The chemical, phthalic anhydride, is corrosive and can attack the eyes and respiratory system.
China's Trade and Economic Cooperation Ministry will examine whether foreign competitors are exporting phthalic anhydride powder at dumping prices, thus causing damage to Chinese companies, to determine whether to impose antidumping surcharges on them, METI said.
Six samples had the flame retardant tri(2-chloroethyl)phosphate and five contained phthalic anhydride, used in making plastics.