Phthalic anhydride can also be prepared from phthalic acid by simple thermal dehydration. Uses Phthalate esters plasticizers. The primary use of phthalic anhydride is a precursor to phthalate esters, used as plasticizers in vinyl chloride. Phthalate esters are derived from phthalic anhydride by the alcoholysis reaction.
Other solubilities: soluble in alcohol and carbon disulfide, slightly soluble in ether, 7.5% in benzene (25°C), forms phthalic acid in water Formula Weight 148.12
(1) Phthalic anhydride is used in the synthesis of primary amines, the agricultural fungicide phaltan, and thalidomide. Other reactions with phthalic anhydride yield phenolphthalein, benzoic acid, phthalylsulfathiazole (an intestinal antimicrobial agent), and orthophthalic acid.
The reaction with alcohols. We'll start by taking the general case of any alcohol reacting with ethanoic anhydride. The equation would be: or, more simply: The product this time (apart from the ethanoic acid always produced) is an ester. For example, with ethanol …
CHAPTER 5 ESTERIFICATION OF PHTHALIC ANHYDRIDE WITH n-BUTANOL. Esterification is a largely exploited reaction in pharmaceutical, perfumery and polymer industries. Despite several synthetic routes, the most acceptable method is the reaction between the corresponding acid and an alcohol (Carey 1990).
chemical test for acid anhydride - acid anhydrides react quickly with alcohols to form esters and carboxylic acids . . . esters form upper layer in the presence of basic aqueous layer (carboxylic acid is extracted, reaction requires basic conditions)
It introduces their chemical reactivity in a general way. A carboxylic acid such as ethanoic acid has the structure: If you took two ethanoic acid molecules and removed a molecule of water between them you would get the acid anhydride, ethanoic anhydride (old name: acetic anhydride).
Response Recommendations. Note: Most foams will react with the material and release corrosive/toxic gases. SMALL FIRE: CO2, dry chemical, dry sand, alcohol-resistant foam. LARGE FIRE: Water spray, fog or alcohol-resistant foam. FOR CHLOROSILANES, DO NOT USE WATER; use AFFF alcohol-resistant medium-expansion foam.
TETRABROMOPHTHALIC ANHYDRIDE reacts exothermically with water. This reaction is expected to be slow, but can become vigorous if local heating accelerates it. Reaction with water is accelerated by acids. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.
About Our Phthalic Anhydride Allergy Test. These chemicals are used in the synthesis of plasticizers and for producing epoxy and alkyd resins as well as a variety of other products including dyes, insecticides, polyester resins and pharmaceuticals. In turn, epoxy and alkyd resins are used as constituents of paints, varnishes, surface coatings,.