2,4′-Dihydroxydiphenyl Sulfone CAS 5397-34-2 | Thermal Paper Developer
2,4'-Dihydroxydiphenyl Sulfone (CAS 5397-34-2), also known as 2,4'-BPS, is an aromatic sulfone compound used as a color developer in heat-sensitive recording materials. Unilong supplies industrial inquiries involving thermal paper coatings, developer blends, and specialty chemical intermediates. The main selection factors are chemical identity, assay method, isomer composition, appearance, and packing format.
For industrial orders, Unilong can discuss the requested grade, 25 kg packing, quantity, and applicable product documentation.
Product Specifications
| Parameter | Product Information |
|---|---|
| Product Name | 2,4'-Dihydroxydiphenyl Sulfone |
| CAS Number | 5397-34-2 |
| Synonyms | 2,4'-BPS; 2,4'-Sulfonyldiphenol; 2-[(4-Hydroxyphenyl)sulfonyl]phenol |
| Molecular Formula | C12H10O4S |
| Molecular Weight | 250.27 g/mol |
| EC Number | 226-421-1 |
| Appearance | White to off-white crystalline powder |
| Assay Grade | ≥98.0%, neutralization titration (grade specification) |
| Melting Point | Approx. 181–185°C (reference property) |
| HPLC / Isomer Profile | Limits and analytical method per agreed grade |
| Packing | 25 kg/bag; 25 kg/drum |
| Primary Application | Thermal paper color-developer formulations |
Assay figures obtained by neutralization titration and HPLC area percentages are not interchangeable. The final supply specification and test methods are stated in the quotation or applicable product documents.
Applications of 2,4'-Dihydroxydiphenyl Sulfone
2,4'-Dihydroxydiphenyl Sulfone is mainly associated with heat-sensitive recording materials. Its performance as a developer is determined by the complete coating formula rather than the raw material alone.
Thermal Receipt Paper
2,4'-BPS can function as a developer component in direct thermal paper coatings used for receipts and transaction records. In an appropriate coating, heating initiates color development with a leuco dye. Print density, background appearance, and image stability depend on the developer system, sensitizers, binders, and processing conditions.
Direct Thermal Labels
Direct thermal label stocks use coatings that produce an image without a separate ink ribbon. 2,4'-Dihydroxydiphenyl Sulfone may be evaluated as part of a suitable developer formulation. Finished-label requirements can differ from those for receipt rolls, particularly where handling and storage conditions vary.
Ticket and Recording Media
Heat-sensitive ticket and recording media also rely on developer and leuco-dye systems. The suitability of a 2,4'-BPS grade depends on the chosen coating composition, required imaging conditions, and end-use requirements. Unilong can discuss the intended manufacturing application when reviewing a quotation.
Thermal Developer Blends
The material can be considered in formulations containing more than one developer component. For blends involving 2,4'- and 4,4'-dihydroxydiphenyl sulfone, the isomer ratio is a relevant specification parameter. Changing that ratio can affect coating behavior, so the requested composition should be defined for the selected grade.
Specialty Chemical Intermediates
With two phenolic hydroxyl groups, the asymmetric 2,4'-isomer can be evaluated as a chemical intermediate in selected downstream synthesis routes. Projects requiring its specific substitution pattern should state the expected assay, allowable isomer content, and any process-relevant impurity limits.
Isomer Identity & Quality Control
CAS 5397-34-2 identifies the 2,4'-isomer. It is not the same compound as 4,4'-Dihydroxydiphenyl Sulfone (CAS 80-09-1), commonly called Bisphenol S. Although both compounds have the formula C12H10O4S, the different hydroxyl positions mean that their composition and performance should not be assumed to be interchangeable.
For the separate 4,4'-isomer, see Bis(4-hydroxyphenyl) Sulfone (CAS 80-09-1).
In thermal paper applications, the developer composition is part of the finished-coating specification. Unilong can discuss these parameters and the relevant batch documentation for the proposed industrial supply.
Packaging, Storage & Industrial Orders
Packaging Options
Standard 25 kg packing formats are used for industrial quotations. Packaging details and order quantity are confirmed with the commercial offer.
For larger purchases, Unilong can review the shipment destination and requested delivery arrangement.
Storage & Handling
Store in tightly closed containers in a cool, dry, well-ventilated area, protected from moisture and direct sunlight. Follow the storage, handling, and safety instructions applicable to the supplied material.
Preserve container labels and keep material away from incompatible substances.
Industrial Chemical Supply from Unilong
Unilong works with industrial customers sourcing specialty organic chemicals for manufacturing and formulation projects. For 2,4'-Dihydroxydiphenyl Sulfone, we can discuss the grade specification, required isomer composition, 25 kg packaging, industrial order quantity, and shipment destination.
- Defined product identity: CAS 5397-34-2, the 2,4'-isomer.
- Relevant technical criteria: Assay basis, appearance, isomer profile, and agreed impurity limits.
- Practical packing choices: 25 kg/bag or 25 kg/drum.
- Commercial coordination: Quotation, order quantity, documentation and shipping terms for the requested grade.
Contact us with the target grade and order quantity for a quotation matched to your manufacturing requirements.
Frequently Asked Questions
Can the 4,4'-isomer be substituted for CAS 5397-34-2?
Not automatically. 4,4'-Dihydroxydiphenyl Sulfone has CAS 80-09-1 and a different substitution pattern. A change in isomer composition may affect a thermal developer formulation, so the required material should be specified by CAS and grade.
Which purity grade is quoted?
The reference grade is ≥98.0% by neutralization titration. If your manufacturing process calls for a different assay target, HPLC method, or isomer limit, include those parameters in the quotation request for assessment.
What industrial packing is available?
Standard packing formats are 25 kg/bag and 25 kg/drum. The selected package type, order quantity and shipping arrangement are included in the quotation.
Can the isomer profile be included in the specification?
Yes, the requested limits can be reviewed as part of the proposed grade specification. The final limits, analytical method and accompanying documents are agreed for the order.
Are COA and SDS documents available?
Document requirements can be discussed with the proposed grade. Unilong checks the applicable specification, batch documentation and safety information in connection with the quotation and shipment.
How are MOQ and lead time determined?
Minimum order quantity and delivery schedule depend on the grade, packing, total order volume and destination. Unilong confirms the applicable commercial terms in the quotation.
Is 2,4'-BPS suitable for phenol-free thermal paper claims?
2,4'-BPS contains phenolic hydroxyl groups and should not be described as a phenol-free developer. Any finished-product compliance or restricted-substance claim requires assessment against the applicable requirements.
Request a Quote: 2,4'-Dihydroxydiphenyl Sulfone
Unilong handles inquiries for industrial-grade CAS 5397-34-2 used in thermal paper developer formulations and related chemical manufacturing. Share the required quantity, specification, packing and destination to discuss supply terms.
Email: sales@unilongindustry.com
