Hexamethylenetetramine (Hexamine)

What Is Hexamethylenetetramine?

Hexamethylenetetramine is a white crystalline organic compound used primarily as a curing agent, crosslinking component and formaldehyde donor in phenolic resins, rubber systems and industrial chemical synthesis.

It is also widely known as Hexamine, Methenamine, Urotropine, HMTA, HMT or Hexa. These names refer to the same substance identified by CAS number 100-97-0.

AOZUN supplies industrial-grade Hexamethylenetetramine with a minimum assay of 99%. Standard quality controls include moisture, ash, solution appearance, heavy metals, chloride, sulfate and ammonium salts.

Why Choose AOZUN as Your Hexamine Supplier?

AOZUN supports international bulk supply of Hexamethylenetetramine for resin, rubber, foundry and other qualified industrial applications.

Key supply features include:

• Minimum assay of 99%

• Controlled moisture and ash

• Powder or crystalline material subject to availability

• Particle-size requirements reviewed before quotation

• Batch-specific Certificate of Analysis

• Technical Data Sheet and Safety Data Sheet support

• PE-lined industrial packaging

• Export and dangerous-goods shipping coordination

• Pre-shipment sample availability subject to project review

• End-use and destination compliance screening

The correct grade should be selected according to the application, particle size, curing behavior, impurity limits and documentation requirements.

Hexamethylenetetramine Product Identification

AOZUN Hexamethylenetetramine Specifications

The specification above describes AOZUN’s standard industrial grade. The final sales specification and batch Certificate of Analysis govern each shipment.

Particle size, pH, free formaldehyde and other application-specific parameters should be included in the purchase agreement when required.

Typical Physical and Chemical Properties

Reference properties are not guaranteed sales limits. Test methods, temperature and product form can affect reported values.

How Does Hexamine Work in Phenolic Resins?

Hexamethylenetetramine is commonly used as the curing agent for novolac phenolic resins.

Novolac resin remains thermoplastic until a suitable crosslinking agent is added. During controlled heating, Hexamine provides reactive methylene species that help connect phenolic molecules into a three-dimensional thermoset network.

This curing process can contribute to:

• Higher hardness

• Improved dimensional stability

• Heat resistance

• Mechanical strength

• Chemical resistance

• Wear resistance

• Thermoset performance

• High char yield in selected systems

Curing behavior depends on resin chemistry, Hexamine concentration, particle size, mixing uniformity, temperature profile, pressure and processing time.

There is no universal addition rate. Customers should determine the correct level through formulation trials with the actual novolac resin and production equipment.

What Is Hexamethylenetetramine Used For?

Phenolic Resins and Molding Compounds

Phenolic resin curing is one of the principal industrial uses of Hexamine. It may be used in:

• Phenolic molding compounds

• Electrical components

• Heat-resistant molded parts

• Industrial laminates

• Friction materials

• Bonded abrasives

• Refractory products

• Resin-coated foundry sand

• Phenolic adhesives

• Insulation and composite materials

Important evaluation points include gel time, cure temperature, flow, gas evolution, porosity, mechanical strength and residual emissions.

Rubber and Tire Adhesion Systems

Hexamine may function as a methylene donor or reactive component in selected rubber formulations and rubber-to-textile or rubber-to-metal adhesion systems.

Potential applications include:

• Tire compounds

• Industrial rubber products

• Conveyor belts

• Rubberized textile materials

• Rubber-to-metal bonding systems

• Mechanical rubber components

Its effect depends on the complete adhesion system, including the rubber type, reinforcing filler, resorcinol component, curing agents and processing temperature.

Hexamine should not be added at a fixed percentage without formulation testing.

Foundry Binders

Hexamethylenetetramine may be used with novolac phenolic resins in resin-coated sand and other thermosetting foundry binder systems.

Buyers should evaluate:

• Cure speed

• Sand flow

• Hot strength

• Gas generation

• Core porosity

• Storage stability

• Casting-surface quality

• Resin compatibility

Particle size and mixing uniformity may directly affect binder distribution and curing consistency.

Friction Materials and Abrasives

Hexamine-cured phenolic resins are used in selected brake materials, clutch components, grinding wheels and bonded abrasive products.

The final formulation should be tested for:

• Cure completeness

• Mechanical integrity

• Heat resistance

• Wear behavior

• Porosity

• Dimensional stability

• Emissions during curing

Adhesives and Coatings

Hexamine may be used in selected phenolic adhesive and coating systems where heat-activated crosslinking is required.

Its suitability depends on the resin type, application temperature, storage stability and acceptable formaldehyde or ammonia emissions during curing.

Solid Fuel Tablets

Hexamine can be used as a raw material for commercially manufactured solid fuel tablets. This is a regulated application that requires appropriate manufacturing controls, labeling, storage and transportation.

AOZUN does not provide a universal fuel-tablet formulation. Buyers must confirm applicable end-use and destination regulations before ordering.

Textile and Paper Processing

Hexamine may be evaluated in selected textile-finishing, paper-treatment and specialty binder formulations. Its performance should be verified with the actual fibers, resins, catalysts and curing conditions.

Corrosion-Inhibitor Formulations

Hexamine may be used as a component in certain industrial metal-treatment and corrosion-inhibitor formulations. Performance depends strongly on acid concentration, temperature, metal type and other formulation ingredients.

Industrial Chemical Synthesis

Hexamethylenetetramine is used as an intermediate or reagent in selected organic and inorganic chemical processes.

The buyer is responsible for establishing a validated manufacturing process, confirming raw-material suitability and complying with all applicable end-use controls.

Which Hexamine Form Should You Select?

Crystalline Hexamine

Crystalline material is commonly selected for general industrial processing and applications in which the material will be dissolved before use.

Fine Powder Hexamine

Fine powder can provide faster dispersion and more uniform blending in phenolic resin and rubber formulations. It may also generate more airborne dust, so suitable dust-control equipment is required.

Coarse or Granular Hexamine

Coarser material may reduce dust and improve handling in automated dosing systems. Dissolution or dispersion may take longer than with fine powder.

Free-Flowing Hexamine

Free-flowing grades may contain processing or anti-caking components. Buyers should confirm whether these additives affect ash content, color, curing behavior or final-product performance.

Product form and particle-size distribution should be written into the purchase specification when they affect processing.

Which Hexamine Specifications Matter Most?

Assay

Assay confirms the principal Hexamethylenetetramine content. Industrial material is commonly specified at 99% minimum.

Moisture

Excess moisture can cause caking, affect weighing and change the behavior of resin or rubber formulations.

Ash

Low ash is important for applications requiring clean curing, controlled residue or predictable electrical and mechanical properties.

Particle Size

Particle size affects flow, dust generation, blending, dissolution and curing uniformity.

Solution Appearance

Solution clarity can help identify insoluble contamination or unexpected processing residue.

Free Formaldehyde

Some buyers establish a separate free-formaldehyde limit for emissions control, storage or downstream formulation requirements.

Chloride, Sulfate and Ammonium

These impurities may matter in corrosion-sensitive, electrical, resin or specialty chemical applications.

Heavy Metals

Heavy-metal limits should be included when required by the finished product, customer standard or destination regulation.

Hexamine Compared with Other Formaldehyde Sources

These products are not universal one-to-one replacements. A change in formaldehyde source can affect cure speed, water content, emissions, porosity and mechanical properties.

How Should Hexamine Be Qualified in a New Formulation?

1. Confirm the Intended Function

Determine whether Hexamine will be used as a curing agent, methylene donor, chemical intermediate, binder component or another approved industrial function.

2. Establish a Written Specification

Define the required assay, moisture, ash, particle size, pH, free formaldehyde and impurity limits.

3. Check Processing Behavior

Evaluate flow, dispersion, dissolution, dosing accuracy and dust generation with the intended equipment.

4. Conduct Cure Trials

For resin or rubber applications, test several controlled formulation levels and processing profiles.

5. Test the Finished Product

Depending on the application, evaluate:

• Gel time

• Cure completeness

• Hardness

• Tensile or flexural strength

• Thermal resistance

• Wear resistance

• Porosity

• Dimensional stability

• Adhesion

• Residual formaldehyde

• Cure emissions

• Electrical properties

6. Complete Regulatory Review

Confirm that the supplied grade, manufacturing process and finished product comply with the destination market and intended end use.

Is Industrial Hexamine Pharmaceutical Grade?

No. Industrial-grade Hexamethylenetetramine must not automatically be described or used as pharmaceutical-grade Methenamine.

A pharmaceutical application requires an appropriate grade, validated manufacturing controls, compendial testing and the applicable regulatory documentation. The existence of a pharmaceutical use for Methenamine does not make every CAS 100-97-0 product suitable for medicine.

Customers requiring pharmaceutical use must provide the applicable pharmacopoeia, impurity limits, manufacturing requirements and regulatory documentation before AOZUN evaluates the inquiry.

No medical dosage or treatment claim should be inferred from this industrial product page.

Is Hexamine Food Grade?

Industrial Hexamine is not automatically food grade.

Hexamethylenetetramine appears in certain regional food regulations under tightly restricted conditions, but authorization varies by country, food category and use level. A substance-level listing does not establish compliance of AOZUN’s standard industrial grade.

Food use should only be considered when:

• The destination regulation explicitly permits the intended use

• The supplied grade meets the applicable purity criteria

• Required traceability and manufacturing controls are documented

• The buyer has completed its regulatory assessment

• AOZUN confirms the appropriate grade in writing

Do not use industrial-grade material in food applications without complete regulatory and quality verification.

Regulatory and End-Use Compliance

Hexamethylenetetramine may be subject to additional controls in some countries because of certain regulated or dual-use applications.

Depending on the destination and end use, AOZUN may request:

• Company registration documents

• End-user information

• End-use declaration

• Import permit

• Chemical-handling qualification

• Storage information

• Confirmation that the material will not be diverted

• Additional transportation or customs documents

Product availability is subject to applicable Chinese export rules, destination-country laws, carrier acceptance and AOZUN compliance review.

Packaging and Storage

Typical packaging options include:

• 25 kg PE-lined kraft paper or woven bag

• 50 kg industrial bag, subject to availability

• 500 kg FIBC, subject to order quantity and transport requirements

• Customized packaging where technically and legally acceptable

Keep Hexamine in its original, tightly closed and moisture-resistant packaging. Store it in a cool, dry and well-ventilated area.

Protect the product from:

• Moisture

• Heat

• Open flames

• Sparks and ignition sources

• Strong acids

• Strong oxidizing agents

• Direct sunlight

• Contamination

• Materials identified as incompatible in the SDS

Use first-in, first-out inventory control. Shelf life should be taken from the product label, quotation or shipment documentation rather than assumed from the chemical name alone.

Safe Handling and Transportation

Hexamethylenetetramine powder may form combustible dust mixtures in air. Avoid generating or accumulating dust.

Recommended precautions include:

• Use suitable local exhaust ventilation

• Keep handling areas clean

• Prevent dust accumulation on equipment and surfaces

• Ground appropriate processing and transfer equipment

• Keep ignition sources away

• Avoid inhaling dust

• Avoid skin and eye contact

• Wear PPE specified by the current SDS

• Keep eyewash and washing facilities available

• Follow local occupational exposure and fire-safety requirements

Hexamethylenetetramine is commonly transported as:

• UN number: UN 1328

• Proper shipping name: Hexamethylenetetramine

• Hazard class: 4.1

• Packing group: III

Always use the classification and instructions shown in the current shipment SDS and dangerous-goods documents.

Available Quality and Shipping Documents

Ask AOZUN to confirm the availability and scope of:

• Certificate of Analysis

• Safety Data Sheet

• Technical Data Sheet

• Product specification

• Particle-size report

• Packing list

• Commercial invoice

• Certificate of origin

• Dangerous-goods declaration

• End-use documentation

• Regulatory statement for the intended destination

Certificates such as pharmaceutical, food, Kosher, Halal or other application-specific approvals should only be claimed when the relevant certificate is available for the exact supplied grade.

How to Request a Hexamine Quotation

Provide the following information:

• Product name: Hexamethylenetetramine or Hexamine

• CAS number: 100-97-0

• Intended application

• Required grade

• Required assay

• Maximum moisture

• Maximum ash

• Required particle size

• Free-formaldehyde requirement, if applicable

• Required impurity limits

• Order quantity

• Estimated annual consumption

• Preferred packaging

• Destination country and port

• Required Incoterm

• Required delivery date

• Required quality and regulatory documents

Complete information allows AOZUN to evaluate grade suitability, compliance requirements and transportation options before issuing a quotation.

Frequently Asked Questions About Hexamethylenetetramine

Are Hexamine, Methenamine and Hexamethylenetetramine the Same?

Yes. Hexamine, Methenamine, Urotropine, HMTA and Hexamethylenetetramine are common names for the compound with CAS number 100-97-0.

The commercial grade and regulatory status may still differ between industrial, laboratory, pharmaceutical and other products.

What Is Hexamine Mainly Used For?

Its principal industrial uses include curing novolac phenolic resins, rubber adhesion systems, foundry binders, friction materials, bonded abrasives, solid fuel products and industrial chemical synthesis.

Why Is Hexamine Used with Novolac Resin?

Novolac resin requires a crosslinking agent to become a thermoset. Hexamine provides reactive methylene species during controlled heating, allowing the resin to form a rigid three-dimensional network.

What Purity Is AOZUN Hexamine?

AOZUN’s standard industrial specification requires a minimum Hexamethylenetetramine content of 99.0%.

Is Hexamine Soluble in Water?

Yes. Hexamethylenetetramine is soluble in water. Dissolution speed depends on particle size, temperature, agitation and solution composition.

Is Hexamine Hygroscopic?

Published descriptions differ in terminology, but commercial Hexamine should be protected from moisture. Moisture exposure can cause caking and may change the measured water content.

Is Hexamine Flammable?

Hexamethylenetetramine is classified for transport as a Class 4.1 flammable solid in many jurisdictions. Fine powder may also create a combustible dust hazard. Follow the current SDS.

Can Industrial Hexamine Be Used in Pharmaceuticals?

Not without grade-specific qualification. Pharmaceutical use requires a suitable Methenamine grade, compendial testing, appropriate manufacturing controls and regulatory documentation.

Can Industrial Hexamine Be Used in Food?

Not automatically. Food applications are tightly regulated and require an appropriate grade, permitted use, documented purity and market-specific compliance review.

What Packaging Is Available?

Typical options include 25 kg PE-lined bags and larger industrial packaging subject to quantity, destination and transportation requirements.

What Documents Are Available?

Depending on the order, AOZUN can confirm the availability of COA, SDS, TDS, specifications, packing documents, certificate of origin and dangerous-goods documentation.

Can I Request a Sample?

Sample availability depends on the intended application, required grade, destination and compliance review. Include your company information and complete application details when requesting a sample.

Request a Hexamethylenetetramine Quote

Looking for a bulk Hexamethylenetetramine supplier for phenolic resins, rubber, foundry binders or industrial synthesis?

Contact AOZUN with your required grade, particle size, specification, quantity, packaging and destination. Our team will review the technical and compliance requirements before providing the applicable specification and commercial quotation.

Product: Hexamethylenetetramine
Common name: Hexamine
CAS number: 100-97-0
Molecular formula: C6H12N4
Standard assay: ≥99.0%
Transport classification: UN 1328, Class 4.1