Isophthalic acid is an aromatic dicarboxylic acid industrially produced by the oxidation of m-xylene. Commercially, it is used primarily as a component of PET (polyethylene terephthalate) copolymer, which is used in bottle resins and, to a much lesser extent, for fibers. What is Iupac name of isophthalic acid?
benzene-1,3-dicarboxylic acid
IUPAC Name | benzene-1,3-dicarboxylic acid |
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Alternative Names | ISOPHTHALIC ACID Benzene-1,3-dicarboxylic acid m-Phthalic acid |
Molecular Formula | C8H6O4 |
Molar Mass | 166.132 g/mol |
InChI | InChI=1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12) |
What is the pKa of phthalic acid?
Phthalic acid (PA) | Terephthalic acid (TPA) | |
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Density | 1.59 g/cm3 | 1.522 g/cm3 |
Water Solubility | Slight | Insoluble in water |
Soluble | ||
Acidity (pKa) | pKa1 = 2.92, pKa2 = 5.41 | pKa1 = 3.51 (25℃), pKa2 = 4.82 (16℃) |
What is isophthalic polyester?
This is a high-quality surface protection gel or lining that contains polyester resins, which that include isophthalic acid (purified isophthalic acid or PIA) as an intermediate or saturated monomer. The isophthalic acid enhances chemical resistance, though it increases the product cost of isophthalic polyester.
Does isophthalic acid on heating form anhydride as final product?
isophthalic acid does not form an anhydride. qualification. Which of the following is an isophthalic acid?
-So the IUPAC name of isophthalic acid is Benzene-1, 3-dicarboxylic acid.
Frequently Asked Questions(FAQ)
How do you make isophthalic acid?
Isophthalic acid is produced on the billion kilogram per year scale by oxidizing meta-xylene using oxygen. The process employs a cobalt-manganese catalyst. The world’s largest producer of isophthalic acid is Lotte Chemical Corporation. In the laboratory, chromic acid can be used as the oxidant.
What can you make from terephthalic acid?
Terephthalic acid is used as a raw material to make terephthalate plasticizers such as dioctyl terephthalate and dibutyl terephthalate. It is used in the pharmaceutical industry as a raw material for certain drugs.
Is phthalic acid a phthalate?
Phthalic acid is a benzenedicarboxylic acid cosisting of two carboxy groups at ortho positions. It has a role as a human xenobiotic metabolite. It is a conjugate acid of a phthalate(1-).
Is terephthalic acid toxic?
* Terephthalic Acid can affect you when breathed in. * Contact can irritate the skin and eyes. * Breathing Terephthalic Acid can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath. * Repeated exposure to Terephthalic Acid may affect the kidneys.
Is phthalic acid is fatty acid?
What is the solubility of phthalic acid?
Phthalic acid is very soluble in boiling water, 18 g/100 mL, and is much less soluble in chilled (14°C) water, 0.54 g/100 mL. Thus, water is a very good recrystallization solvent for phthalic acid.
Is phthalic acid strong or weak?
As a weak acid, phthalic acid reacts vigorously with strong bases.
Is polyester resin isophthalic?
Orthophthalic polyester resin is the standard economic resin used by many people. Isophthalic polyester resin is now becoming the preferred material in industries such as marine where its superior water resistance is desirable.
What is isophthalic gelcoat?
The isophthalic gelcoats are an effective and long-lasting solution for giving suitable surface finishing to all kinds of products. These are polyester isophthalic resins based composite materials mixed with colouring pastes or transparent pastes, pigments and thixotropic agents.
Which is better epoxy or polyester resin?
Epoxy is more resistant to wearing, cracking and peeling, and corrosion or damage from chemical or environmental degradation. Polyester is more fragile and useful for temporary fixes, or low-stress use. Epoxy is generally more expensive than resin, due to its strength and formulation requirements.
What is the melting point of phthalic acid?
210 °C Pricing & Availability
Physicochemical Information | |
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Boiling point | 289 °C (1013 hPa) (decomposition) |
Density | 1.59 g/cm3 (20 °C) |
Flash point | 168 °C |
Melting Point | 210 °C (closed capillary tube) |
What is the action of heat on phthalic acid?
heating, phthalic acid readily yields phthalic anhydride (with a five-membered ring), but isophthalic and terephthalic acids do not undergo this reaction.
Is phthalic anhydride a phthalate?
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. … The most important diester is bis(2-ethylhexyl) phthalate (DEHP), used in the manufacture of polyvinyl chloride compounds.
What is purified isophthalic acid?
Purified isophthalic acid (PIA) is mainly used as an intermediate in the production of unsaturated polyester resins, followed by polyester and alkyd resins (mainly for surface coatings) and inks, reinforced plastics and packaging applications.
What is Pia in chemistry?
PIA – purified isophthalic acid – is a difunctional aromatic acid. The white, free-flowing crystalline powder is available in bulk and a variety of packaging sizes.
What is malonic acid used for?
Malonic acid is used as a building block chemical to produce numerous valuable compounds, including the flavor and fragrance compounds gamma-nonalactone, cinnamic acid, and the pharmaceutical compound valproate.
Which of the following produces isophthalic acid upon oxidation?
Complete answer: Naphthalene on oxidation in the presence of potassium permanganate or potassium dichromate gives phthalic acid.
Is phthalic acid a dicarboxylic acid?
Phthalic acid is an aromatic dicarboxylic acid, with formula C6H4(CO2H)2. It is an isomer of isophthalic acid and terephthalic acid. … Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others being isophthalic acid and terephthalic acid.
Is isophthalic acid soluble in water?
Chemical Properties Isophthalic acid is a white crystalline powder or needle-like crystals and it’s an isomer of phthalic acid and terephthalic acid.It is insoluble in cold water but soluble in oxygenated solvents and alcohol.
What is Orthophthalic polyester resin?
DESCRIPTION: ORTHOPHTHALIC POLYESTER RESIN is a thixotropic polyester resin, moderately reactive for general usage, with good mechanical properties. It contains special additives which significantly improve the working environment during and after application, thanks to the considerable reduction in styrene emissions.
What is the name of C8H6O4?
Terephthalic acid | C8H6O4 – PubChem.
Is benzoic acid an organic compound?
benzoic acid, a white, crystalline organic compound belonging to the family of carboxylic acids, widely used as a food preservative and in the manufacture of various cosmetics, dyes, plastics, and insect repellents.
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