Succinic Anhydride CAS 108-30-5

Introduction to Succinic Anhydride

Succinic Anhydride is the intramolecular cyclic anhydride of succinic acid, forming a five-membered dicarboxylic anhydride ring structure. It appears as white needle-shaped or flaky crystals at room temperature with a faint characteristic odor. It dissolves readily in acetone, chloroform, ethanol and most polar organic solvents, and shows limited solubility in cold water. Contact with water or moist air triggers slow hydrolysis, converting the material back to succinic acid.

Industrial production relies primarily on catalytic hydrogenation of maleic anhydride, or dehydration of purified succinic acid under elevated temperature. The reactive anhydride ring undergoes ring-opening reactions including esterification, amidation and addition with alcohols, amines and other nucleophiles. This reactivity establishes the compound as a widely used platform intermediate across pharmaceutical, polymer and fine chemical production chains.

Chemical & Physical Properties

Applications

Pharmaceutical and fine chemical intermediate: Used as a starting material for sulfonamide drugs, vitamin derivatives and analgesic API synthesis. It also serves as a precursor for succinimide derivatives and other active pharmaceutical ingredient building blocks.

Alkyd resin and coating raw material: Incorporated into alkyd resin formulations to improve film flexibility, adhesion and chemical resistance. It also acts as a curing agent and modifier for epoxy resin systems.

Plasticizer and lubricant additive: Reacts with alcohols to produce succinate ester plasticizers for PVC and cellulose resins. It also serves as an intermediate for lubricating oil additives and corrosion inhibitor formulations.

Agricultural and biodegradable polymer feedstock: Used in production of plant growth regulators and food acidulant intermediates. It also acts as a key monomer for biodegradable polyester synthesis and green polymer development.

Storage & Safety Precautions

• Store in tightly sealed polyethylene-lined fiber drums in a cool, dry and ventilated warehouse. Keep away from water, strong oxidizing agents and strong alkalis. Maintain low humidity conditions to prevent slow hydrolysis and product caking.
• Wear safety goggles, dust respirators and nitrile gloves during bulk handling. Avoid inhalation of fine dust and prolonged skin contact. The material may cause irritation to the respiratory tract, eye mucosa and skin with excessive exposure.
• Use stainless steel or plastic equipment for melting and solution preparation. Keep bulk storage areas equipped with appropriate dust collection systems. Do not store material in open containers for extended periods.

Succinic Anhydride FAQ

Q: What primary industrial functions does Succinic Anhydride perform?

A: Succinic Anhydride serves mainly as a reactive intermediate for pharmaceutical API, alkyd resin and plasticizer production. It also supports manufacturing of agricultural chemicals, lubricant additives and biodegradable polyester feedstocks across multiple industrial chains.

Q: Does Succinic Anhydride degrade when exposed to humid conditions?

A: Yes. Succinic Anhydride hydrolyzes gradually on contact with moisture or high humidity to form succinic acid. Store the material in tightly sealed, moisture-proof containers in dry warehouses to preserve anhydrous purity and prevent partial conversion to the diacid form.

Q: What storage and handling protocols apply to industrial Succinic Anhydride?

A: Store Succinic Anhydride in sealed drums in cool, dry, ventilated areas away from strong bases, oxidizers and direct moisture exposure. Wear dust-resistant PPE during handling. Avoid inhalation of fine dust, which may cause irritation to the respiratory tract and eye mucosa.