Description

3-Methyl-1,3-Butanediol is a versatile branched-chain diol with the CAS number 2568-33-4. This compound is valued for its excellent solvency, low volatility, and ability to act as a humectant and intermediate in high-performance formulations. It is a critical raw material for manufacturers in the polymer, personal care, and specialty chemical industries seeking to enhance product stability and performance. Its bifunctional nature allows for its use in creating polyesters, plasticizers, and as a carrier solvent.

Application

• Polymer & Resin Intermediate: A key monomer for producing unsaturated polyester resins (UPR) and polyurethanes (PU), contributing to flexibility and durability.
• Plasticizer & Solvent: Used as a high-boiling-point solvent and co-plasticizer in coatings, inks, and adhesives to improve film formation and reduce VOC content.
• Personal Care & Cosmetics: Functions as an effective humectant and emollient in skin creams, lotions, and hair care products, helping to retain moisture.
• Pharmaceutical Intermediates: Serves as a building block in the synthesis of active pharmaceutical ingredients (APIs) and other fine chemicals.
• Chemical Synthesis: Employed as a versatile intermediate for manufacturing plasticizers, lubricants, and other specialty esters.
• Industrial Cleaners: Acts as a coupling agent and solvent in heavy-duty industrial and institutional cleaning formulations.

Basic Information

Product Name	3-Methyl-1,3-Butanediol
CAS No.	2568-33-4
Molecular Formula	C5H12O2
Molecular Weight	104.15 g/mol
Synonyms	3-Methylbutane-1,3-diol; 1,3-Dihydroxy-3-methylbutane; 3-Methyl-1,3-butanediol; Isobutylidene glycol; MBD; 3-Methylbutanediol; 3-Methylbutylene glycol; 3-Methylbutane-1,3-diol
EINECS	219-909-1

Quality Control

Our 3-Methyl-1,3-Butanediol is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including gas chromatography (GC) and Karl Fischer titration, to ensure it meets precise specifications for purity, identity, and moisture content. Certificates of Analysis (COA) are provided with each shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep container tightly sealed when not in use to minimize exposure to atmospheric moisture. Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Specific Gravity (20/20°C)	0.980 - 0.995
Refractive Index (20°C)	1.438 - 1.442

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.