1,4-Butanediol[4]

Updated: 2026-09-16

Overview

1,4-Butanediol (BDO) is an organic compound classified as a diol, featuring hydroxyl groups at both ends of its four-carbon chain. It is a key intermediate in chemical synthesis, particularly for polyurethane and polyester production. Industrially, BDO is produced via hydrogenation of maleic anhydride or acetylene-based processes. Due to its bifunctional reactivity, BDO serves as a building block for spandex fibers, thermoplastic polyurethanes (TPUs), and biodegradable plastics like polybutylene succinate (PBS). Its balanced hydrophilicity and solvent properties also make it valuable in coatings and adhesives.

Physical and Chemical Properties

BDO is a colorless, viscous liquid with a mild characteristic odor. It exhibits high thermal stability, with a boiling point of 235°C, and is fully miscible with water and most polar organic solvents. Its hygroscopic nature necessitates airtight storage to prevent moisture absorption. The compound reacts with strong acids, bases, and oxidizing agents, potentially generating hazardous byproducts. Its flammability (flash point: 121°C) requires careful handling to avoid ignition risks. BDO’s low volatility reduces inhalation hazards but mandates skin protection due to its irritant properties.

Main Applications

Over 50% of global BDO production is dedicated to polyurethane manufacturing, where it acts as a chain extender for flexible foams and elastomers. It also serves as a precursor for tetrahydrofuran (THF), a solvent for PVC and pharmaceuticals, and gamma-butyrolactone (GBL), used in electrolytes and cleaning agents. In consumer goods, BDO-derived PBS is employed in compostable packaging and agricultural films. Niche applications include synthetic leather, automotive interiors, and specialty coatings requiring elasticity and adhesion.

Safety and Storage

BDO is classified as a Category 4 irritant (skin and eyes) under GHS. Proper PPE—gloves, goggles, and vapor respirators—is essential during handling. Storage tanks should be constructed from stainless steel or polyethylene, with nitrogen blanketing recommended for large volumes to prevent oxidation. Spills must be contained using inert absorbents like sand, as BDO can penetrate soil and contaminate waterways. Disposal should comply with local regulations, preferably via licensed incineration. First aid measures include flushing affected areas with water for 15 minutes and seeking medical attention for ingestion.

B2B Procurement Guide

Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis) confirming purity ≥99.5%. For polymer-grade BDO, residual aldehydes and water content must be minimized (typically <0.1%). Bulk purchases (20+ metric tons) often qualify for discounts, but consider Just-in-Time delivery to reduce storage costs. Regional pricing varies; Asian markets (e.g., China) offer competitive rates, while European/US suppliers provide stricter QC. Verify logistics compatibility—BDO is typically shipped in ISO tanks or 200L drums.