Isobutanol (2-Methyl-1-propanol) 99.5% / 99.9% CAS No. 78-83-1 Industrial & Pharmaceutical Grade

Isobutanol, available in 99.5% and 99.9% concentrations, is produced via advanced propene hydroformylation technology using rhodium catalysts, followed by rigorous fractionation and purification processes . It features excellent solvency power, moderate evaporation rate, and partial miscibility with water while being completely miscible with most organic solvents . As a branched four-carbon primary alcohol, it is widely used in the production of coating resins, paint thinners, printing inks, and as an intermediate in the flavor, fragrance, and pharmaceutical industries . Its high purity and consistent quality make it ideal for critical applications requiring precise solvent properties. Each batch is rigorously tested using GC analysis to ensure consistent quality meeting industrial and pharmaceutical standards.

Scope of Application

Used as a solvent in oven-dried varnishes, urea and phenolic resin-based coatings, and nitrocellulose and alkyd resin varnishes ;
Acts as a key solvent and diluent in printing inks, paint strippers, cleaners, and hydraulic fluids ;
Functions as an extraction agent for oils, drugs, perfumes, hormones, antibiotics, and vitamins in pharmaceutical manufacturing ;
Widely applied as a chemical intermediate for the production of iso-butyl esters, plasticizers, and synthetic flavors;
Used in the preparation of flotation agents for ore processing and in synthetic leather manufacturing ;
Serves as a solvent and reagent in analytical chemistry for the determination of calcium, strontium, barium, sodium, potassium, lithium, silver, chlorine, and phosphites ;
Acts as a raw material for the production of petroleum additives, antioxidants (2,6-di-tert-butyl-p-cresol), and synthetic musk fragrances ;
Used in the lipase-catalyzed production of biodiesel and as a catalyst for liquid-phase esterification reactions ;
Functions as a solvent for the separation of lithium chloride from sodium or potassium chlorides, and for the extraction of strontium bromide and barium bromide .

Product Features

Acetaldehyde, the raw material of the product, is of biological origin and follows the green natural route. The product is produced using the international leading technology, which fills the gap in process technology in China. The odor and high-temperature stability of the products are superior to those of similar products in foreign countries by adopting the odor-removing and refining technology independently developed by the Company. The content of 1,3-butanediol is over 99.5%, with a high purity. It has better moisturizing and emollient properties in cosmetic formula. The Company adopts advanced analytical instruments such as GC and GC-MS to detect samples, which enables the products to reach the industry standard of cosmetics.

Packaging and Transportation

Available in epoxy-lined steel drums (160kg-170kg), IBC totes, and ISO tanks ;

Classified as flammable liquid (Class 3), comply with all transportation safety regulations including UN1112 or UN1212 classification with Packing Group III ;

Safety and Storage

Store in a cool, well-ventilated warehouse away from kindling, heat sources, and direct sunlight; maintain storage temperature below 30°C ;

Keep containers tightly sealed to prevent evaporation, contamination, and moisture absorption;

Avoid storage with strong oxidizing agents, acids, acid anhydrides, acid chlorides, alkali metals, and aluminum ;

Ensure storage area is equipped with explosion-proof electrical equipment and appropriate fire-fighting systems suitable for Class B fires (alcohol-resistant foam, dry chemical, carbon dioxide; do NOT use water jet) ;

Product display

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What are the main differences between the 99.5% and 99.9% purity grades of Isobutanol?

The 99.5% grade is suitable for most industrial applications including solvent use in coatings, inks, and general chemical synthesis, offering cost-effectiveness. The 99.9% ultra-high purity grade provides stricter control over impurities including water (<500 ppm), carbonyl compounds, and non-volatile residues, specifically engineered for sensitive applications including pharmaceutical synthesis, flavor and fragrance manufacturing, food-grade applications (GB 2760-2014 permitted food flavor), and analytical reagent use where minimal impurities are critical for consistent results .

How does Isobutanol compare to n-Butanol in terms of properties and applications?

Isobutanol (2-methyl-1-propanol) is a branched-chain isomer of butanol, while n-butanol is the straight-chain isomer. The branched structure of isobutanol results in slightly different physical properties: lower boiling point (108°C vs. 118°C), lower freezing point (-108°C vs. -89°C), and somewhat different solvency characteristics . In coatings, isobutanol offers faster evaporation than n-butanol, making it preferred for oven-dried varnishes and quick-drying formulations. It also exhibits different reactivity patterns in esterification and other chemical reactions due to steric effects from the branched structure.

Can Isobutanol be produced from bio-based sources?

Yes, isobutanol can be produced through biological fermentation processes using renewable feedstocks . Dehydration of fermented isobutanol is useful for the production of renewable chemicals and fuels . Our bio-based Isobutanol is available upon request for customers requiring sustainable, renewable content in their products, meeting identical purity specifications as petrochemical-derived material.