DTBHQ Manufacturers & Suppliers
2,5-Di-tert-Butylhydroquinone for industrial inhibition, stabilization and antioxidant applications.
DTBHQ, or 2,5-Di-tert-Butylhydroquinone, is a substituted hydroquinone used as an industrial polymerization inhibitor, antioxidant and stabilizer. It is supplied as a white to tan crystalline solid and is selected for applications in unsaturated polyester resins, rubber processing, coatings, lubricants and other specialty chemical systems where controlled inhibition and oxidative stability are required.
ORBITALA supports qualified industrial customers seeking DTBHQ manufacturers and suppliers in Europe, the EU and international markets. Product availability depends on the required grade, specification, packaging, destination, regulatory status and intended use. The final purchasing decision should always be based on the approved manufacturer specification, current safety data sheet and batch-specific certificate of analysis.
DTBHQ Manufacturers & Suppliers - Table of Contents:
Laboratory technician examining DTBHQ (2,5-Di-tert-butylhydroquinone) crystals during quality testing.
What Is DTBHQ?
DTBHQ is the common abbreviation for 2,5-Di-tert-Butylhydroquinone, CAS No. 88-58-4. The molecule is a hydroquinone derivative in which two tert-butyl groups occupy the 2 and 5 positions of the aromatic ring. This structure gives DTBHQ the combination of hindered phenolic functionality, low volatility and radical-scavenging behavior that supports its use as an inhibitor and stabilizer in industrial formulations.
In practical terms, DTBHQ helps control unwanted oxidative reactions and premature free-radical polymerization during storage or processing. Its performance depends on the surrounding formulation, oxygen availability, temperature, inhibitor concentration and the presence of other stabilizers. It should therefore be evaluated in the intended system rather than treated as a universal drop-in replacement for hydroquinone, mono-tert-butylhydroquinone or other inhibitor technologies.
DTBHQ Product Overview
These values are general product information rather than contractual acceptance limits. Commercial specifications vary by manufacturer, grade and test method. Buyers should request the current technical data sheet and certificate of analysis before approving a source.
How DTBHQ Works?
Free-radical polymerization and oxidation proceed through reactive chain-carrying species. Hydroquinone derivatives can interrupt these chains by reacting with peroxy radicals and converting them into more stable products. DTBHQ is sterically hindered by its two tert-butyl groups, which influences the rate at which it reacts and helps explain its value in storage-stability applications.
In unsaturated polyester systems, DTBHQ may be used alone or with other inhibitors to extend package stability while limiting the effect on gel time during cure. In rubber and coating applications, it can reduce oxidative degradation, color development, odor formation or premature surface film formation. Actual performance must be confirmed under the formulation's normal temperature, oxygen and processing conditions.
Main Uses of DTBHQ
Unsaturated Polyester Resins
DTBHQ is used as a storage inhibitor for unsaturated polyester resins, frequently as part of a blended inhibitor system. Its relatively slow radical-scavenging behavior can improve package stability with limited interference in the intended curing stage. Resin producers should validate inhibitor choice against monomer content, initiator chemistry, storage temperature and required gel time.
Rubber and Elastomer Processing
DTBHQ is used as an antioxidant in rubber articles and as a stopping agent in rubber emulsions. These functions help control oxidation and terminate residual polymerization activity at the required stage. Suitability depends on polymer type, color requirements, processing conditions and the performance of the complete additive package.
Paints Coatings and Printing Systems
In selected paints and coatings, DTBHQ can act as an anti-skinning agent and stabilizer. It may help reduce premature film formation in the container and limit undesirable color or odor development. Formulators should confirm compatibility with resin chemistry, driers, pigments and the intended regulatory market.
Lubricants and Industrial Fluids
DTBHQ may be used as an industrial antioxidant in lubricants, non-food oils and specialty fluids where oxidation resistance is required. The effective treatment level and compatibility with other additives must be established by the formulator through stability and performance testing.
Polymer Modification and Chemical Intermediates
DTBHQ is also supplied for polymer modification, wire and cable applications, industrial coatings and as a specialty chemical intermediate. Buyers should identify the exact use because impurity limits, particle form, packaging and documentation requirements can differ substantially between industrial and synthesis grades.
Technical Specifications and Quality Parameters
A DTBHQ specification should define measurable properties that affect identity, handling and performance. The table below shows common purchasing parameters; it is not a universal specification.
The approved product specification should state test methods and acceptance limits. Typical values published in technical literature are useful for comparison but should not be substituted for a contractual specification or batch certificate.
DTBHQ Grades and Product Selection
DTBHQ is available in industrial and laboratory or synthesis grades. Industrial grades are intended for process and formulation use, while synthesis grades are generally supplied in smaller packs with analytical documentation for research, development or controlled chemical synthesis. A buyer should not assume that a reagent-grade product is commercially suitable for production, or that an industrial grade meets laboratory purity requirements.
DTBHQ must also be distinguished from TBHQ, tertiary-butylhydroquinone, CAS No. 1948-33-0. TBHQ is a different molecule commonly associated with food-antioxidant applications. DTBHQ, CAS No. 88-58-4, should not be described or purchased as food-grade TBHQ. Using the full chemical name and CAS number in every inquiry helps prevent substitution errors.
-
Use CAS No. 88-58-4 and EC No. 201-841-8 to confirm identity.
-
State the required assay, melting range, appearance and impurity limits.
-
Specify powder or crystalline form when handling and dissolution behavior matter.
-
Request a representative certificate of analysis before source approval.
-
Confirm whether REACH coverage, country-specific inventory status or additional compliance documentation is required.
DTBHQ Manufacturers and Suppliers in Europe and the EU
For buyers seeking DTBHQ manufacturers and suppliers in the EU and Europe, availability may come from a combination of regional distributors, importers, specialty chemical manufacturers and global producers with European regulatory coverage. DTBHQ is listed as a REACH-registered substance, but this does not remove the need to verify the registration status and supply-chain role applicable to a specific transaction.
A reliable DTBHQ supplier in Europe should provide the current EU-format safety data sheet, product specification, certificate of analysis, packaging information, country of origin and confirmation of regulatory coverage. Buyers should also determine whether the supplier is the manufacturer, an authorized distributor, an importer or a trading company. This distinction affects traceability, change control, complaint handling and long-term supply continuity.
Regions Where DTBHQ Is Manufactured
DTBHQ production is concentrated within the specialty-chemical and hydroquinone-derivative industry. Public information confirms manufacturing activity in several established chemical-producing regions, while other markets primarily function as distribution and logistics centers. Because public supplier listings do not always identify the actual production plant, buyers should request a declaration of manufacturer and country of origin.
United States
The United States has a long-established hydroquinone-derivative industry and documented commercial DTBHQ supply. U.S. regulatory reporting also records domestic production or import volumes for CAS No. 88-58-4. Buyers should still confirm the current manufacturing location, grade and production campaign because a supplier's corporate headquarters or warehouse does not necessarily identify the source plant.
India
India is a confirmed manufacturing base for DTBHQ. Indian specialty chemical producers publish technical data for commercial 2,5-Di-tert-Butylhydroquinone grades and supply industrial packaging for antioxidant, rubber, urethane, lubricant and related applications. India is therefore an important source for buyers evaluating qualified DTBHQ manufacturers outside Europe.
China and East Asia
China has a broad network of fine-chemical and antioxidant producers offering DTBHQ for domestic and export markets. East Asia also provides laboratory and specialty-chemical supply through established catalog companies. Supplier qualification is essential because online listings may represent manufacturers, distributors or traders, and published purity claims do not replace an audited specification and batch documentation.
Europe
Europe has an established market for polymer inhibitors, antioxidants and hydroquinone derivatives, supported by REACH-registered supply chains and specialized distributors. Some DTBHQ supplied in Europe may be manufactured within the region, while other material is imported from qualified producers in North America or Asia. Procurement teams should verify origin, importer responsibilities and continuity of regulatory coverage.
Saudi Arabia
Saudi Arabia has a substantial petrochemical and polymer industry, but publicly verifiable evidence of dedicated commercial DTBHQ production in the country is limited. DTBHQ required by Saudi manufacturers is more commonly expected to enter through approved specialty-chemical importers or regional distributors. Buyers searching for DTBHQ suppliers in Saudi Arabia should request written confirmation of the actual producer, country of origin and local regulatory compliance.
Singapore
Singapore is a major chemical manufacturing, storage and distribution hub for Southeast Asia. It supports regional access to polymer additives and specialty chemicals, although public evidence of large-scale local DTBHQ synthesis is limited. Singapore-based suppliers may hold stock, arrange import and export documentation or coordinate supply from manufacturing sites elsewhere in Asia, Europe or North America.
Taiwan
Taiwan has advanced polymer, electronics and specialty-chemical industries and established channels for DTBHQ and related antioxidants. Public product availability is easier to verify than dedicated bulk manufacturing capacity. A buyer should therefore distinguish Taiwan-based distribution or laboratory supply from material manufactured in Taiwan and request the original manufacturer's certificate of analysis and origin statement.
The United Arab Emirates serves as a regional logistics and re-export center for industrial chemicals. Publicly documented dedicated DTBHQ manufacturing in the UAE is limited, so supply is generally expected to rely on imported material held or distributed through regional chemical companies. Purchasers should confirm the producer, origin, repacking history and compliance documents rather than treating a UAE warehouse location as proof of local manufacture.
Quality Assurance and Batch Acceptance
DTBHQ purchasing should be supported by a documented batch-acceptance process. The level of testing depends on the application, but identity and assay should be confirmed at minimum for critical industrial use. The buyer should define sampling, retest and nonconformance procedures before the first commercial shipment.
-
Manufacturer name, manufacturing site and country of origin.
-
Batch number and full traceability.
-
Certificate of analysis linked to the delivered batch.
-
Identity and assay results using agreed methods.
-
Appearance and melting range.
-
Moisture, ash, heavy metals or particle-size data when required.
-
Current safety data sheet and regulatory statements.
-
Change-control and complaint-handling process.
-
Retention sample and independent testing arrangements when specified
Packaging Storage and Transportation
Industrial DTBHQ is commonly supplied in sealed fibre drums or paper bags with a protective inner liner. A 25 kg package is documented for some commercial grades, while other pack sizes may be available. The selected packaging should protect the product from contamination, moisture, light and prolonged exposure to air and should be suitable for the applicable transport classification.
Storage instructions vary by supplier. Current manufacturer documentation should be followed, including any recommendation for cool, dry and dark conditions or storage under inert gas. Some suppliers publish shelf-life guidance of up to 24 months in unopened original packaging, but the approved shelf life must be confirmed for the actual grade and storage environment.
Transport classification must be taken from the current supplier safety data sheet. Certain commercial safety data sheets classify DTBHQ as UN 2811, Toxic solid, organic, n.o.s., Class 6.1, Packing Group III. Classification can depend on composition, jurisdiction and packaging; it should not be assigned solely from the product name.
Selecting a DTBHQ Manufacturer or Supplier
A DTBHQ supplier should be evaluated on more than price and stated purity. The source must be capable of maintaining specification, traceability, regulatory compliance and reliable delivery over the expected life of the purchasing program.
-
Demonstrated experience with hydroquinone derivatives and industrial inhibitors.
-
A controlled manufacturing and quality-management system.
-
Consistent product specification and lot-to-lot performance.
-
Transparent manufacturer identity and country of origin.
-
Availability of technical data, SDS and batch-specific CoA.
-
REACH and chemical-inventory support for the destination market.
-
Appropriate dangerous-goods classification and compliant packaging.
-
Realistic production allocation, minimum order quantity and lead time.
-
Technical support for source qualification and change management.
Information Required for a DTBHQ Quotation
A complete request for quotation allows DTBHQ suppliers to assess technical fit, availability and regulatory feasibility without unnecessary delay. The inquiry should include:
-
Product name and CAS No. 88-58-4.
-
Required grade and approved specification.
-
Annual and initial order quantities.
-
Preferred packaging and pallet configuration.
-
Destination country and delivery location.
-
Consignee and end user.
-
Industrial application and intended use.
-
Required delivery schedule and Incoterms.
-
Certificate, testing and documentation requirements.
-
REACH, import or chemical-inventory requirements.
-
Any restrictions regarding manufacturer or country of origin
How ORBITALA Supports DTBHQ Procurement?
ORBITALA works with qualified industrial customers seeking DTBHQ suppliers in Europe, the EU and international markets. Support may include reviewing the requested chemical identity and grade, identifying suitable sources, coordinating technical documentation, aligning packaging and test requirements, and assessing the feasibility of a compliant delivery route.
Every inquiry is subject to technical acceptance, product availability, destination-country requirements and confirmation of the intended end use. ORBITALA does not treat a commercial product listing as proof of manufacturing capability and seeks to distinguish the original producer from distributors and trading companies during source qualification.
Frequently Asked Questions
Request Information About DTBHQ
Organizations seeking DTBHQ should provide the required grade or specification, quantity, preferred packaging, destination country and requested delivery schedule. The inquiry should also identify the consignee, end user and industrial application, together with any applicable import, REACH or documentation requirements. ORBITALA will review the request to assess technical compatibility, product availability and the feasibility of a compliant supply route.