THEIC – TRIS(2-HYDROXYETHYL) ISOCYANURATE

THEIC tris hydroxyethyl isocyanurate is a trifunctional polyol containing a heat-resistant isocyanurate ring and three hydroxyethyl groups.
THEIC tris hydroxyethyl isocyanurate functions as a reactive monomer, branching agent, crosslinking intermediate, and thermal-performance modifier.
THEIC tris hydroxyethyl isocyanurate is used in polyester resins, polyesterimide wire enamels, powder coatings, alkyd resins, electrical insulation materials, plastics, and specialty polymers.

CAS Number: 839-90-7
EC Number: 212-660-9
Molecular Formula: C₉H₁₅N₃O₆
Molecular Weight: 261.23 g/mol

SYNONYMS

THEIC tris hydroxyethyl isocyanurate, THEIC, Tris(2-hydroxyethyl) Isocyanurate, Tris(2-Hydroxyethyl)isocyanurate, Tris Hydroxyethyl Isocyanurate, Tris(hydroxyethyl) Isocyanurate, Tris(hydroxyethyl) Cyanurate, Tris(2-hydroxyethyl) Cyanurate, 1,3,5-Tris(2-hydroxyethyl) Isocyanurate, 1,3,5-Tris(2-hydroxyethyl)isocyanurate, 1,3,5-Tris(2-hydroxyethyl)triazine-2,4,6-trione, 1,3,5-Tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione, Tris(2-hydroxyethyl)-1,3,5-triazinetrione, N,N′,N″-Tris(2-hydroxyethyl)isocyanurate, Isocyanuric Acid Tris(2-hydroxyethyl) Ester, Isocyanuric Acid Tris-Hydroxyethyl Ester, Isocyanuric Acid Hydroxyethyl Ester, Tris-Beta-Hydroxyethyl Isocyanurate, Tris(β-hydroxyethyl) Isocyanurate, T.H.E.I.C., Hydroxyethyl Isocyanurate Triol, Isocyanurate-Based Triol, Isocyanurate Triol, Trifunctional Isocyanurate Polyol, Trifunctional Hydroxyethyl Isocyanurate, Triazine-Ring Triol, Triazine Trione Triol, Heat-Resistant Polyol, High-Temperature Polyol, Polyester Resin Polyol, Polyesterimide Polyol, Wire-Enamel Polyol, Magnet-Wire Resin Monomer, Electrical-Insulation Resin Monomer, Powder-Coating Polyol, Alkyd-Resin Polyol, Thermosetting-Resin Monomer, Reactive Hydroxyl Monomer, Three-Functional Polyol, Trihydroxy Isocyanurate, Hydroxyl-Functional Isocyanurate, Polyol Crosslinking Intermediate, Polyester Branching Agent, Resin Heat-Stability Additive, Polymer Thermal-Stability Additive, White Crystalline THEIC, THEIC Powder, High-Purity THEIC, Industrial-Grade THEIC, CAS 839-90-7, EC 212-660-9, EINECS 212-660-9, PubChem CID 13286, UNII N7W2MH0P2M, C₉H₁₅N₃O₆

APPLICATIONS

THEIC tris hydroxyethyl isocyanurate serves as a trifunctional polyol monomer in heat-resistant polyester-resin synthesis.
THEIC tris hydroxyethyl isocyanurate introduces branching and a thermally stable isocyanurate ring into the polyester backbone.

THEIC tris hydroxyethyl isocyanurate supports polyester resins used in thermosetting varnishes and protective metal coatings.
THEIC tris hydroxyethyl isocyanurate can improve cured-film hardness, thermal performance, chemical resistance, and durability when resin stoichiometry is properly controlled.

THEIC tris hydroxyethyl isocyanurate functions as a principal polyol component in polyesterimide wire-enamel binders.
THEIC tris hydroxyethyl isocyanurate contributes heat resistance, electrical insulation performance, mechanical strength, and solvent resistance to properly cured enamel films.

THEIC tris hydroxyethyl isocyanurate contributes to base-coat enamels applied to copper and aluminum magnet wire.
THEIC tris hydroxyethyl isocyanurate supports multilayer insulation systems in which a compatible high-performance topcoat is applied over the polyester base layer.

THEIC tris hydroxyethyl isocyanurate supports high-solids wire-enamel formulations designed to reduce the proportion of volatile processing solvent.
THEIC tris hydroxyethyl isocyanurate can provide smooth film formation and useful magnet-wire properties after repeated application and thermal curing.

THEIC tris hydroxyethyl isocyanurate functions in electrical-insulation coatings for motor and generator windings.
THEIC tris hydroxyethyl isocyanurate helps the cured insulation tolerate elevated operating temperatures when the complete electrical-insulation system is properly designed.

THEIC tris hydroxyethyl isocyanurate contributes to wire enamels for transformer, relay, solenoid, and coil applications.
THEIC tris hydroxyethyl isocyanurate supports dielectric and mechanical properties that remain useful under repeated thermal cycling.

THEIC tris hydroxyethyl isocyanurate supports winding-wire insulation used in compressors, pumps, power tools, and industrial electrical equipment.
THEIC tris hydroxyethyl isocyanurate performance must be validated for refrigerant exposure, thermal aging, voltage stress, winding deformation, and service temperature.

THEIC tris hydroxyethyl isocyanurate functions in insulating varnishes used to impregnate coils, windings, and porous electrical assemblies.
THEIC tris hydroxyethyl isocyanurate can increase resin functionality and support development of a rigid, heat-resistant insulating network.

THEIC tris hydroxyethyl isocyanurate contributes to electrical and electronic resin systems requiring useful properties at elevated temperature.
THEIC tris hydroxyethyl isocyanurate can support thermal stability, surface hardness, and electrical insulation when reacted into a compatible polymer.

THEIC tris hydroxyethyl isocyanurate serves as a polyol building block in polyester resins intended for powder coatings.
THEIC tris hydroxyethyl isocyanurate can increase branching, hydroxyl functionality, hardness, and crosslinking potential within the formulated polyester binder.

THEIC tris hydroxyethyl isocyanurate supports powder coatings for metal furniture, appliances, shelving, fixtures, and fabricated components.
THEIC tris hydroxyethyl isocyanurate contributes to high-gloss and hard surface finishes when resin design, curing agent, pigment, and bake schedule are compatible.

THEIC tris hydroxyethyl isocyanurate functions in industrial topcoat resins requiring improved wear resistance.
THEIC tris hydroxyethyl isocyanurate can support resistance to scratching and surface abrasion by increasing network rigidity and crosslink density.

THEIC tris hydroxyethyl isocyanurate contributes to coating resins intended for contact with organic solvents and industrial chemicals.
THEIC tris hydroxyethyl isocyanurate chemical-resistance performance must be verified against the exact chemical, concentration, temperature, and exposure period.

THEIC tris hydroxyethyl isocyanurate supports exterior coating resins requiring improved weather resistance and property retention.
THEIC tris hydroxyethyl isocyanurate does not independently guarantee ultraviolet stability because pigments, resin chemistry, stabilizers, and exposure conditions remain critical.

THEIC tris hydroxyethyl isocyanurate functions in high-gloss finishing coatings for metal, wood-composite, and suitable furniture substrates.
THEIC tris hydroxyethyl isocyanurate helps develop hard and glossy surfaces when the complete coating formulation is adequately leveled and cured.

THEIC tris hydroxyethyl isocyanurate contributes to alkyd-resin synthesis as a multifunctional alcohol component.
THEIC tris hydroxyethyl isocyanurate can increase branching and introduce a thermally stable heterocyclic structure into compatible alkyd formulations.

THEIC tris hydroxyethyl isocyanurate supports water-reducible and water-soluble enamel-resin development after suitable functional modification.
THEIC tris hydroxyethyl isocyanurate resin compatibility depends on acid value, neutralization, molecular weight, co-solvent selection, and aqueous stability.

THEIC tris hydroxyethyl isocyanurate functions as a reactive polyol in selected polyurethane and urethane-modified resin systems.
THEIC tris hydroxyethyl isocyanurate reacts with compatible isocyanate groups to form highly functional urethane-containing networks.

THEIC tris hydroxyethyl isocyanurate contributes to polyurethane coatings, adhesives, elastomers, and foams requiring a rigid isocyanurate-containing polyol component.
THEIC tris hydroxyethyl isocyanurate dosage must be balanced because high functionality can increase hardness, viscosity, crosslink density, and brittleness.

THEIC tris hydroxyethyl isocyanurate supports high-temperature adhesive and bonding-resin research involving polyester, polyurethane, or hybrid polymer chemistry.
THEIC tris hydroxyethyl isocyanurate can improve thermal and chemical performance when adhesion, flexibility, shrinkage, and substrate compatibility remain adequate.

THEIC tris hydroxyethyl isocyanurate serves as a branching or crosslinking intermediate in specialty thermosetting resins.
THEIC tris hydroxyethyl isocyanurate provides three hydroxyl groups that can react through esterification, urethane formation, etherification, or other suitable condensation chemistry.

THEIC tris hydroxyethyl isocyanurate functions as a plastics additive or reactive component intended to improve thermal stability.
THEIC tris hydroxyethyl isocyanurate must be evaluated for compatibility, processing temperature, migration, mechanical properties, and long-term aging in the selected polymer.

THEIC tris hydroxyethyl isocyanurate contributes to the preparation of phosphorus-, nitrogen-, or sulfur-containing derivatives for flame-retardant research.
THEIC tris hydroxyethyl isocyanurate derivatives can combine the nitrogen-containing isocyanurate core with additional flame-retardant functionality after controlled chemical modification.

THEIC tris hydroxyethyl isocyanurate supports laboratory and pilot-scale development of polyesters, polyesterimides, coatings, adhesives, and functional polymer networks.
THEIC tris hydroxyethyl isocyanurate can be evaluated through hydroxyl value, melting behavior, resin viscosity, gel time, thermal analysis, dielectric testing, hardness, adhesion, and chemical-resistance measurements.

DESCRIPTION

THEIC tris hydroxyethyl isocyanurate is the common industrial designation for 1,3,5-tris(2-hydroxyethyl) isocyanurate.
THEIC tris hydroxyethyl isocyanurate has the systematic name 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione.

THEIC tris hydroxyethyl isocyanurate has the molecular formula C₉H₁₅N₃O₆ and a molecular weight of approximately 261.23 g/mol.
THEIC tris hydroxyethyl isocyanurate is identified by CAS Number 839-90-7 and EC Number 212-660-9.

THEIC tris hydroxyethyl isocyanurate contains a six-membered isocyanurate ring with three carbonyl groups and three ring nitrogen atoms.
THEIC tris hydroxyethyl isocyanurate carries one 2-hydroxyethyl substituent on each of the three nitrogen atoms.

THEIC tris hydroxyethyl isocyanurate possesses three terminal primary hydroxyl groups and therefore behaves as a trifunctional polyol.
THEIC tris hydroxyethyl isocyanurate can increase polymer branching and crosslinking density more strongly than a conventional difunctional glycol.

THEIC tris hydroxyethyl isocyanurate combines a rigid polar heterocyclic core with three flexible hydroxyethyl side groups.
THEIC tris hydroxyethyl isocyanurate structure provides hydroxyl reactivity together with thermal, chemical, and electrical-performance potential.

THEIC tris hydroxyethyl isocyanurate normally appears as a white crystalline solid or white powder.
THEIC tris hydroxyethyl isocyanurate has a melting point commonly reported near 135°C.

THEIC tris hydroxyethyl isocyanurate is highly soluble in water and has useful solubility in selected polar organic media.
THEIC tris hydroxyethyl isocyanurate is reported as somewhat soluble in alcohol and acetone but insoluble in benzene and chloroform.

THEIC tris hydroxyethyl isocyanurate can be manufactured by reacting isocyanuric acid with ethylene oxide in a suitable reaction medium and catalyst system.
THEIC tris hydroxyethyl isocyanurate can also be produced through a catalyzed reaction between isocyanuric acid and ethylene carbonate.

THEIC tris hydroxyethyl isocyanurate reacts with dicarboxylic acids, polycarboxylic acids, anhydrides, and ester-forming derivatives to produce branched polyesters.
THEIC tris hydroxyethyl isocyanurate reacts through its three hydroxyl groups while the isocyanurate ring remains incorporated into the polymer structure.

THEIC tris hydroxyethyl isocyanurate is widely associated with polyester and polyesterimide wire-enamel technology.
THEIC tris hydroxyethyl isocyanurate resin systems can provide heat resistance, dielectric performance, hardness, wear resistance, weather resistance, and chemical resistance.

THEIC tris hydroxyethyl isocyanurate requires careful stoichiometric control because its functionality can cause rapid molecular-weight growth and gel formation.
THEIC tris hydroxyethyl isocyanurate processing behavior depends on purity, hydroxyl content, reaction temperature, catalyst, water content, acid functionality, and addition sequence.

THEIC tris hydroxyethyl isocyanurate quality is commonly evaluated through assay, appearance, melting range, hydroxyl value, moisture, color, and residual impurities.
THEIC tris hydroxyethyl isocyanurate exact acceptance limits depend on the intended polyester, wire-enamel, powder-coating, polyurethane, or technical application.

THEIC tris hydroxyethyl isocyanurate has low volatility under ordinary handling conditions but can generate airborne dust during transfer and charging.
THEIC tris hydroxyethyl isocyanurate should be protected from moisture, contamination, excessive heat, strong oxidizing agents, and incompatible reactive materials.

PROPERTIES

Chemical Name: Tris(2-hydroxyethyl) Isocyanurate

Chemical Class: Trifunctional Isocyanurate Polyol

CAS Number: 839-90-7

EC Number: 212-660-9

Molecular Formula: C₉H₁₅N₃O₆

Molecular Weight: 261.23 g/mol

Physical Form: Crystalline Powder or Solid

Appearance: White

Melting Point: Approximately 135°C

Water Solubility: Highly Soluble

Hydroxyl Functionality: Three Primary Hydroxyl Groups

Primary Functions: Polyol Monomer, Branching Agent, Crosslinking Intermediate, and Thermal-Performance Modifier

Main Uses: Polyester Resins, Polyesterimide Wire Enamels, Powder Coatings, Alkyd Resins, Polyurethanes, and Plastics

Key Benefits: Heat Resistance, Electrical Performance, Hardness, Gloss, Wear Resistance, and Chemical Resistance

Storage: Cool, Dry, Tightly Closed, and Protected from Moisture and Contamination

FIRST AID

Inhalation

THEIC tris hydroxyethyl isocyanurate dust exposure should be followed by movement to fresh air and rest in a position comfortable for breathing.
THEIC tris hydroxyethyl isocyanurate inhalation requires medical attention if coughing, throat irritation, wheezing, or breathing difficulty persists.

Skin Contact

THEIC tris hydroxyethyl isocyanurate contamination should be removed from the skin with soap and plenty of water.
THEIC tris hydroxyethyl isocyanurate skin exposure requires medical advice if persistent redness, irritation, pain, or another adverse response develops.

Eye Contact

THEIC tris hydroxyethyl isocyanurate eye exposure should be rinsed immediately with clean running water for at least 15 minutes while the eyelids are held open.
THEIC tris hydroxyethyl isocyanurate eye exposure requires contact-lens removal when easy and prompt medical attention if pain, redness, or visual disturbance persists.

Ingestion

THEIC tris hydroxyethyl isocyanurate accidental ingestion should be followed by rinsing of the mouth without inducing vomiting unless instructed by medical personnel.
THEIC tris hydroxyethyl isocyanurate significant ingestion requires contact with a physician or poison information center, particularly when symptoms develop.

Note to Physicians

THEIC tris hydroxyethyl isocyanurate exposure should be treated symptomatically with appropriate supportive care.
THEIC tris hydroxyethyl isocyanurate exposure assessment should consider grade, purity, amount, exposure route, symptoms, and the current Safety Data Sheet.

HANDLING AND STORAGE

Handling

THEIC tris hydroxyethyl isocyanurate should be handled using methods that minimize airborne dust, moisture uptake, and contamination.
THEIC tris hydroxyethyl isocyanurate should be kept away from food, drink, strong oxidizing agents, excessive heat, and incompatible reactive chemicals.

Ventilation

THEIC tris hydroxyethyl isocyanurate powder-handling areas should have effective general ventilation and local dust extraction where necessary.
THEIC tris hydroxyethyl isocyanurate respiratory protection should be used when engineering controls cannot adequately limit airborne dust.

Storage

THEIC tris hydroxyethyl isocyanurate should be stored in tightly closed and moisture-resistant containers within a cool and dry area.
THEIC tris hydroxyethyl isocyanurate should be protected from humidity, direct sunlight, excessive heat, oxidizing agents, contamination, and damaged packaging.

Spill and Leak Procedures

THEIC tris hydroxyethyl isocyanurate spills should be collected using filtered vacuum equipment or another low-dust recovery method.
THEIC tris hydroxyethyl isocyanurate should be prevented from entering drains or surface water in bulk quantities, and dry sweeping or compressed air should be avoided.

Handling Precautions

THEIC tris hydroxyethyl isocyanurate handling should include suitable gloves, protective clothing, and tightly fitting safety goggles.
THEIC tris hydroxyethyl isocyanurate industrial processing should follow the current grade-specific Safety Data Sheet, dust-control procedures, and applicable chemical-handling regulations.