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China Overseas Science & Trade Co., Ltd.
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For Plasticizer-- 85-44-9 --O-Phthalic Anhydride
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Product Description
English name: o-Phthalic anhydride
Abbreviation: PA
Another name: 2,5-Isobenzofurandione
Phthalic anhydride 99+ %
2-benzofuran-1,3-dione
2,2'-(oxydicarbonyl)dibenzoic acid
Chemical formula:C8H4O3,C6H4(CO)2O
Molecular formula: C23H29CLO6
Molecular weight: 148.12
CAS: 84-44-9
O-Phthalic anhydride is formed by phthalic acid molecular through dehydration. O-phthalic anhydride is made from naphthalene and mixed with air through the process of 350~360°C vapor phase oxidation catalyzed by vanadium pentoxide,. Phthalic anhydride is in the shape of white scaly or crystalline powder. It is an important organic chemical material and mainly used in the production of plasticizer, alkyd resin, dye, unsaturated resin and some of medicines or pesticides.
Technical Data
Density | 1.53 |
Melting chroma | ≤ 100 |
Thermal stability chroma | ≤ 150 |
Melting point | 131.2°C |
Boiling point | 295°C |
Crystallization point | ≥ °C 130.0 |
Purity% | ≥ 99.5 |
Free acid content | ≤ % 0.5 |
Stability | Stable |
Water-solubility | Soluble in hot water, ethanol, ethyl ether, benzene and most organic solvents except cold water. |
Packaging and Storage
Packaging: Lined with plastic woven bag, 25kg/bag
Storage: Stored in dry and ventilated place. Keep away from fire, moisture, direct sunshine and rain. Maintain the integrity of the packaging, wear protective equipment when handling, do not touch and inhalation.
Storage period: Within three months from the date of production.