Phthalic anhydride

Phthalic Anhydride
Other Names: 1,3-Isobenzofurandione, o-Phthalic anhydride

CAS Number: 85-44-9
Sum Formula: C₈H₄O₃
Molar Mass: 148.12 g/mol
Appearance: White crystalline solid with a characteristic pungent odor

Phthalic anhydride is an important industrial chemical used as an intermediate in the production of plastics, dyes, resins, and other organic compounds. It is particularly significant in polymer chemistry and the manufacture of phthalate esters.

Applications
Chemical Industry: Used as a key precursor in the production of plasticizers (such as phthalates), polyesters, and alkyd resins.
Industrial Synthesis: Employed in the manufacture of dyes, pigments, surfactants, and detergents.
Laboratory Use: Utilized in organic synthesis as a reagent for preparing aromatic carboxylic acid derivatives.

Safety
Signal Word: Danger

Hazard Statements:
H315: Causes skin irritation
H317: May cause an allergic skin reaction
H318: Causes serious eye damage
H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335: May cause respiratory irritation

Precautionary Statements:
P101: If medical advice is needed, have product container or label at hand
P102: Keep out of reach of children
P261: Avoid breathing dust
P280: Wear protective gloves
P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing
P501: Dispose of contents/container to an authorized waste disposal facility or return to supplier

First Aid Measures
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek immediate medical attention
Skin Contact: Wash thoroughly with soap and water. Remove contaminated clothing. Seek medical advice if irritation or allergic reaction occurs
Inhalation: Move the exposed person to fresh air. Keep at rest in a position comfortable for breathing. Call a doctor or poison center if symptoms persist or breathing is difficult
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical advice

Handling and Storage
Storage Conditions: Store in a cool, dry, well-ventilated area in tightly closed containers. Protect from moisture and incompatible substances such as strong bases and oxidizers
Handling Precautions: Avoid dust formation and inhalation. Use appropriate personal protective equipment. Ensure adequate ventilation during use