A formulation chemist sourcing for a new industrial cleaner line, a PVC compounder specifying plasticizer inputs, a lubricant manufacturer looking for a high-purity ester base: all three may find themselves evaluating isotridecyl alcohol as a starting point. Isotridecyl alcohol uses span surfactants, plasticizers, lubricant esters, and coatings. The molecule rarely appears in end products on its own. It gets converted, and that range of derivatives is what gives it relevance across so many industries.
What Is Isotridecyl Alcohol?
Isotridecyl alcohol (ITDA) is a branched, primary C13 oxo alcohol used as a chemical intermediate in the production of nonionic surfactants, specialty esters, PVC plasticizers, lubricant additives, and coating resins. It is a clear, high-boiling liquid, miscible with most organic solvents and practically insoluble in water. Its branched carbon structure gives downstream derivatives favorable hydrophobicity, chemical stability, and formulation compatibility.
Chemistry and Production
ITDA carries the molecular formula C13H28O and belongs to the fatty alcohol family, a class defined by carbon chain lengths ranging from C6 to C22. Unlike linear fatty alcohols produced from natural fats and oils, isotridecyl alcohol is synthesized via the oxo process (hydroformylation), in which olefin feedstocks react with carbon monoxide and hydrogen under elevated temperature and pressure, yielding a branched isomer mixture rather than a single structure.
That branched architecture directly shapes downstream performance. Branched alcohols produce surfactant ethoxylates with better low-temperature wetting and lower pour points than linear counterparts, and ester derivatives with reduced volatility and improved compatibility in demanding PVC and lubricant formulations.
Production is concentrated among large, integrated oxo alcohol manufacturers with dedicated C4 processing assets. ITDA is not a commodity spot-market material. It is tied to integrated producers with long qualification cycles, so buyers sourcing ITDA or ITDA-derived intermediates benefit from supplier relationships built around supply continuity, not just price.
Isotridecyl Alcohol Uses
Surfactants (Largest Use)
The largest-volume application for isotridecyl alcohol is ethoxylation, which involves reacting the alcohol with ethylene oxide to produce isotridecyl alcohol ethoxylates. These nonionic surfactants are valued for wetting, emulsification, and degreasing performance.
The performance profile shifts with ethylene oxide content. Lower mole ratio products lean toward wetting and defoaming. Mid-range products suit detergency. Higher mole ratios produce effective emulsifiers. End-use applications include:
- Industrial and institutional cleaners
- Household detergents and hard-surface cleaners
- Textile processing auxiliaries (scouring, wetting, and dyeing baths)
- Metalworking fluids
- Agricultural adjuvants for pesticide and herbicide formulations
- Paper de-inking aids
ITDA ethoxylates perform well at low temperatures and across a broad pH range, which matters for industrial cleaning systems running under variable process conditions. Per OECD biodegradability testing, they are also readily biodegradable, supporting compliance with environmental requirements in cleaning product formulations.
ITDA ethoxylates appear in personal care and cosmetic formulations as well, primarily as emulsifiers in oil-based cleansing products. Their ability to form stable emulsions when water is added makes them suitable for hydrophilic cleansing oils and rinse-off formulations where mild, effective emulsification is required.
PVC Plasticizers
ITDA is a key alcohol feedstock for specialty PVC plasticizers. Esterified with phthalic anhydride, trimellitic anhydride (TMA), or dicarboxylic acids such as adipic or sebacic acid, it produces long-chain ester plasticizers suited for demanding flexible PVC applications.
Plasticizers built on C13 alcohols carry high molecular weight, low volatility, and good migration resistance. These properties matter most where long service life is the specification: wire and cable insulation for high-temperature ratings, automotive interior components, long-life commercial flooring, and industrial PVC profiles. The longer alcohol chain produces higher-boiling esters that remain in the compound over time, resisting loss through heat or extraction. For a deeper look at how alcohol chain length and other variables interact in formulation, see TCC’s guide to plasticizer compatibility.
Lubricant and Specialty Esters
Esterification of ITDA with carboxylic acids and polyacids produces specialty esters for synthetic lubricants, functional fluids, and polymer stabilizer formulations, including:
- Synthetic lubricant base stocks
- Compressor oils and hydraulic fluids requiring low volatility and oxidative stability
- Polymer stabilizer systems for high-heat processing environments
- Specialty coatings and resins requiring ester co-solvents or modifiers
ITDA derivatives combine a high boiling point with thermal stability. Lubricant formulators working against demanding temperature or service-life requirements find C13-based esters among a limited set of alcohol platforms capable of meeting those thresholds.
Coatings and Functional Fluids
ITDA serves paints and coatings applications as both a specialty solvent and a building block for coating resins. In aqueous production systems for textiles, paper, and coatings, small additions can suppress foaming. Specialty ITDA esters appear in coating formulations where slow evaporation and resin compatibility are the primary targets.
Isotridecyl Alcohol vs. Tridecyl Alcohol
Both isotridecyl alcohol and tridecyl alcohol (also called tridecanol) share the molecular formula C13H28O, but their structures differ. The “iso” prefix indicates a branched carbon chain; tridecyl alcohol is linear. That structural difference translates into meaningful performance differences downstream.
| Property | Isotridecyl Alcohol (Branched) | Tridecyl Alcohol (Linear) |
| Pour point | Lower | Higher |
| Viscosity | Lower | Higher |
| Low-temperature performance | Better | More limited |
| Surfactant ethoxylate wetting | Strong, particularly at low temperatures | Good across standard ranges |
| Ester volatility | Lower | Comparatively higher |
For applications requiring reliable low-temperature performance, such as industrial cleaners used in cold environments or lubricant esters with demanding pour point specifications, the branched structure of ITDA is generally preferred. Linear tridecyl alcohol may suit applications where the structural difference has less influence on end-use performance. Selection between the two typically comes down to temperature requirements, volatility limits, and formulation compatibility.
Grades and Specification
Commercial ITDA is available in different purity grades. High-purity grades, typically at or above 99%, are specified for performance-critical surfactant and ester applications where consistent reaction behavior and downstream product quality are required. Lower-purity grades suit cost-sensitive industrial applications where exact isomer distribution is less critical.
“Isotridecyl alcohol” is also sold under multiple trade names and CAS numbers reflecting the branched isomer mixture that makes up commercial product. CAS numbers 68526-86-3 and 27458-92-0, among others, appear in SDS documentation and product literature depending on isomer composition and producer. Confirming grade and isomer profile with a supplier is part of qualifying ITDA for any performance-critical application.
ITDA should be stored under nitrogen, below 40°C, with moisture excluded. Long storage at elevated temperatures or with moisture exposure can affect downstream reaction performance.
Supply Considerations for Procurement
ITDA supply runs through a small number of integrated oxo alcohol producers, primarily in Europe and Asia. It is not available from a broad field of spot-market suppliers, so sourcing flexibility is limited when demand tightens or logistics disrupt primary supply lanes.
For buyers running ITDA or ITDA-derived intermediates at regular volume, supplier qualification and continuity planning are worth treating as strategic concerns, not afterthoughts. Lead times, minimum order quantities, and backup sourcing options should be understood before a gap in supply creates a production problem.
Source ITDA Through TCC
The Chemical Company supplies ELUCARE TD (isotridecyl alcohol) through producer relationships built over more than three decades of global chemical distribution. TCC’s sourcing network, logistics infrastructure across the Americas, and direct technical support give procurement teams and formulators a reliable supply channel for ITDA. Contact TCC to discuss grade selection, availability, and sourcing options for your application.
TCC’s product range spans plasticizers, intermediates, surfactant precursors, and specialty chemicals, covering the full breadth of the ITDA value chain.
Isotridecyl Alcohol Uses
Regulatory and compliance statuses presented in this article are accurate to the best of our knowledge at time of publication and are subject to change at any time. Readers are encouraged to consult qualified regulatory experts for the most current information applicable to their situation.
