Industrial Grade Fluorescent Brightener OB-1 for Textile, Plastic, and Coating Applications
Industrial grade Fluorescent Brightener OB-1 candidate from a China-based supplier, positioned for textile auxiliary, plastic auxiliary, and coating auxiliary use. Source page lists purity at 99.5% minimum, yellow to yellow-green powder appearance, formula C26H26N2O2S, HS code 3204200000, and packing options including 25 kg drums and 10 kg or 15 kg bags. CAS number is not clearly provided in the extracted listing and should be confirmed against COA, SDS, and buyer specification before RFQ or sampling.
Quick buying facts
Identify the grade, package, and import market before comparing suppliers.
Use this page to check the product identity, common specification points, document scope, package notes, and destination-market questions before sending a China sourcing request.
CAS No.: not provided in extracted listing; buyer should verify before purchaseFluorescent brightener / optical brightening agent, industrial gradeCandidate for RFQ after CAS, SDS, COA, packing, and export classification verification
Confirm moisture protection, batch labeling, shelf-life statement, and storage-condition wording on supplier documents
Ask whether export packing can meet destination-country labeling and documentation requirements
Applications and sourcing options
Check whether this product fits the buyer's actual application.
Clear application, grade, package, and document notes help separate real sourcing demand from a vague price check.
Use context
Common applications
Textile auxiliary sourcing where OB-1 identity, purity, and impurity limits match buyer formulation requirements
Plastic brightening applications for polymers such as ABS, PS, PA, PC, PP, or rigid PVC as listed by supplier
Coating or paint additive sourcing where optical brightener compatibility must be confirmed by buyer testing
Distributor stock replenishment with batch-level COA and export packing checks
Sample evaluation before full-container or palletized procurement
How we compare
Sourcing options
Request 100 g to 1 kg evaluation sample with matching COA and SDS
Source 25 kg export drums or listed bag formats for trial orders after document review
Compare at least two China OB-1 suppliers using CAS, purity, volatile matter, shade, fluorescence strength, and impurity data
Use third-party pre-shipment inspection for appearance, packing integrity, labeling, and batch sampling
Ask supplier for Qingdao Port FOB pricing, CIF pricing, and current lead time separately
Human review
Compliance notes
CAS number is missing or unclear in the extracted product attributes; confirm exact identity before technical or regulatory review
Request current SDS, COA, TDS, commercial invoice template, packing list template, and certificate of origin if needed
Confirm whether the product is classified as dangerous goods for sea, air, or road transport under current SDS transport section
Verify REACH, UK REACH, TSCA, K-REACH, IECSC, or other inventory status according to buyer destination and end use; do not rely on marketplace text alone
Confirm impurity profile, heavy metals, residual solvent or volatile matter limits, and test methods relevant to textile or polymer applications
Check whether the product is acceptable for the buyer's restricted substance list, brand RSL/MRSL, and customer-specific textile compliance requirements
Confirm HS code 3204200000 with customs broker before import declaration
Supplier claims and certifications should be validated through documents and, where necessary, third-party testing
Buyer search paths
Related sourcing terms
These terms support long-tail discovery while keeping the page focused on useful product and China export buying context.
Share target market, quantity, packaging scope, artwork status, delivery destination, and required documents so CHN Chemicals can prepare a cleaner supplier comparison.
Questions to confirm
What is the confirmed CAS number and EINECS/EC number for this OB-1 lot?
Can you provide recent COA showing purity, volatile matter, melting point or relevant assay method, appearance, and batch number?
What are the controlled impurity limits, especially volatile matter, ash, heavy metals, and insoluble matter if tested?
Is the product DG or non-DG for sea and air shipment according to the latest SDS?
Which packing options are actually available for export orders: 25 kg drum, 10 kg bag, 15 kg bag, 50 kg drum, 200 kg drum, or 1000 kg packaging?
What is the minimum order quantity for trial order and regular shipment?
Can you provide pre-shipment sample, retained sample policy, and third-party inspection options?
What is the current lead time from confirmed PO to Qingdao Port shipment?
Checks before quote
CAS number is missing or unclear in the extracted product attributes; confirm exact identity before technical or regulatory review
Request current SDS, COA, TDS, commercial invoice template, packing list template, and certificate of origin if needed
Confirm whether the product is classified as dangerous goods for sea, air, or road transport under current SDS transport section
Verify REACH, UK REACH, TSCA, K-REACH, IECSC, or other inventory status according to buyer destination and end use; do not rely on marketplace text alone
Confirm impurity profile, heavy metals, residual solvent or volatile matter limits, and test methods relevant to textile or polymer applications
Check whether the product is acceptable for the buyer's restricted substance list, brand RSL/MRSL, and customer-specific textile compliance requirements
Confirm HS code 3204200000 with customs broker before import declaration
Supplier claims and certifications should be validated through documents and, where necessary, third-party testing
Next step
Send the product page with your target quantity and market. A sourcing manager can then confirm sample options, supplier fit, packaging details, and open document gaps.
