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Phthalic acid, Acide Phtalique, 88-99-3

Phthalic acid, Acide Phtalique88-99-3

Common Name Phthalic acid
CAS Number 88-99-3
Density 1.5±0.1 g/cm3
Molecular Formula C8H6O4
Molecular Weight 166.131
Boiling Point 378.3±25.0 °C at 760 mmHg
Melting Point 210-211 °C (dec.)(lit.)
Flash Point 196.7±19.7 °C
Signal Word Warning
Symbol GHS07
GHS07

 

Use of Phthalic acid


Phthalic acid is the final common metabolite of phthalic acid esters (PAEs). Phthalic acid can be used for the synthesis of synthetic agents, such as isophthalic acid (IPA), and terephthalic acid (TPA). Phthalic acid has applications in the preparation of phthalate ester plasticizers[

Phthalic acid

CAS: 88-99-3

Molecular Formula: C8H6O4

Names and Identifiers

Name Phthalic acid
Synonyms sunftal 20
Pathalic acid
Phthalic acid
acidephtalique
kyselinaftalova
Acide phtalique
o-Phthalic Acid
1,2-phthalicacid
Kyselina ftalova
o-Dicarboxybenzene
1,2-dicarboxybenzene
acidephtalique(french)
benzene-1,2-dicarboxylate
o-benzenedicarboxylic acid
o-Benzenedicarboxylic acid
1,2-Benzenedicarboxylic acid
Benzene-1,2-dicarboxylic acid
CAS 88-99-3
EINECS 201-873-2
InChI InChI=1/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)/p-2
InChIKey XNGIFLGASWRNHJ-UHFFFAOYSA-N

Physico-chemical Properties

Molecular Formula C8H6O4
Molar Mass 166.13
Density 1.59 g/cm3 at 15 °C
Melting Point 210-211 °C (dec.) (lit.)
Boling Point 214.32°C (rough estimate)
Flash Point 168 °C
Water Solubility 7 g/L (25 ºC)
Solubility Soluble in methanol and ethanol, slightly soluble in water and ether, insoluble in chloroform.
Vapor Presure 7.8 hPa (191 °C)
Appearance Colorless crystal
Color White
Merck 14,7371
BRN 608199
pKa 2.89(at 25℃)
PH 3.2(1 mM solution);2.55(10 mM solution);2(100 mM solution);
Storage Condition Store below +30°C.
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
Sensitive Easily absorbing moisture
Refractive Index 1.5100 (estimate)
MDL MFCD00002467
Physical and Chemical Properties Melting Point: 230 ℃

flash point: 168 ℃

water solubility:<0.1g/100 mL at 20 C

appearance: white crystals
Use Used in the manufacture of dyes, polyester resins, polyester, drugs and plasticizers

Risk and Safety

Hazard Symbols Xi - Irritant
Irritant
Risk Codes 36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36 - Wear suitable protective clothing.
S37/39 - Wear suitable gloves and eye/face protection
WGK Germany 1
RTECS TH9625000
TSCA Yes
HS Code 29173980
Toxicity LD50 orally in rats: 7.9 g/kg (Shaffer)

Upstream Downstream Industry

Raw Materials Ammonium hydroxide
Phthalic anhydride
Nitric acid
Downstream Products Mercurochrome
Dioctyl phthalate

Reference:

LogP 0.73 at 20℃
preparation 1. Phthalic anhydride was prepared by hydrolysis. 2. The phthalic anhydride is added to 60 ° C. Water, and ammonia water is added while stirring to pH 8. After decolorization and filtration, the crystal is acidified with hydrochloric acid. Industrial use of O-methyl formic acid, O-xylene or naphthalene as raw materials, by vanadium pentoxide catalytic oxidation preparation. It can be produced by hydrolysis of phthalic anhydride and also by oxidation of O-xylene or O-Toluic acid. Oxidation of naphthalene or electrolysis of naphthalene with fuming sulfuric acid in the presence of cerium or thorium salts. Phthalic acid can form phthalic acid mono-and di-esters; Substitution reactions can also occur on its benzene ring. Because phthalic acid and phthalic anhydride have similar chemical properties, phthalic anhydride is often produced directly in industry.
Application is used for synthetic resins, synthetic fibers and drugs, etc. Because phthalic acid and phthalic anhydride have similar chemical properties, phthalic anhydride is often produced directly in industry. In applications, phthalic anhydride may be used in place of phthalic acid. The oral LD50 of rats was 7.9g/kg.
The standard solution was prepared and used as the standard for the alkali method. Test cobalt, copper, germanium, mercury, nickel, potassium, strontium and zinc, determination of cobalt, iodate and lead. Organic Synthesis.
used in the manufacture of dyes, polyester resins, polyester, drugs and plasticizers
used as chemical reagents and Chromatographic Reagents

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