Optical Brightener CBS-X Powder CAS 27344-41-8 for Paper, Detergent, Plastics and Textile Sourcing
Buyer-facing sourcing candidate for Optical Brightener CBS-X / fluorescent whitening agent listed under CAS 27344-41-8. Suitable RFQ focus includes CAS confirmation, grade and assay basis, whiteness or fluorescence performance data, impurity profile, application match for paper or detergent systems, export documentation, and 25 kg drum packing availability.
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.: 27344-41-8, to be confirmed against COA and SDSChemical auxiliary / fluorescent whitening agent / optical brightenerCandidate for RFQ after CAS, grade, COA, SDS, and export document verification
CAS No.: 27344-41-8, to be confirmed against COA and SDS
Other name listed: Fluorescent Brightener CBS-X / Optical Brightening Agent OBS/CBS
Molecular formula listed: C28H22O6S2.2Na, buyer should verify formatting and identity
EINECS listed inconsistently in source text; confirm correct EC/EINECS number before order
Appearance: powder
Color listed: green; confirm actual shade, fluorescence tone, and visual standard
Purity listed: ≥99%; confirm test method, assay basis, and whether this is active content or dry basis
Melting point listed: 300-305 °C; confirm test method if required for specification approval
Application claims include paper chemicals, detergent/washing powder, plastics, PVC, coatings, synthetic fibers, leather auxiliary, and electronics chemicals; validate grade suitability by end use
Request batch COA showing assay, moisture, insoluble matter, ash/salts if relevant, particle size, shade/fluorescence strength, and whiteness performance data
Who uses this page
Target buyers
Paper chemical importers and distributors
Detergent and washing powder formulators
Textile auxiliary distributors
Plastics and PVC additive buyers
Coatings and masterbatch manufacturers
Industrial chemical traders handling fluorescent whitening agents
Before matching
Documents to check
CAS number, grade, assay, and impurity profile
SDS, COA, TDS, HS code, and transport classification
Destination-market import documents before supplier matching
For export RFQ, ask whether inner liner, palletization, shrink wrap, batch labeling, and container loading photos are available
Confirm shelf-life statement, storage condition statement on documents, and whether packaging is suitable for sea freight
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
RFQ comparison for optical brightener CBS-X CAS 27344-41-8
Paper brightener sourcing where CAS, shade, and fluorescence strength must be checked
Detergent or washing powder additive procurement requiring active content and solubility confirmation
Plastics, PVC, coating, or synthetic fiber projects needing compatibility validation by buyer testing
Distributor stock planning for 25 kg export drum packing
How we compare
Sourcing options
Request 1 kg sample for lab qualification before commercial order
Source by CAS-confirmed CBS-X grade with batch COA and SDS
Ask for application-specific grade recommendation for paper, detergent, textile, or plastics
Compare suppliers by assay method, fluorescence strength, shade consistency, moisture, insolubles, and documentation readiness
Use 25 kg export packing for palletized commercial shipments after sample approval
Human review
Compliance notes
Obtain SDS, COA, TDS, commercial invoice, packing list, and certificate of origin before shipment
Confirm HS code, export declaration name, and whether the product is regulated as dangerous goods for the destination route
Check destination-market chemical inventory status and buyer-side import registration requirements before purchase
Verify CAS identity because source data contains application and EINECS inconsistencies
Ask for non-restricted use declaration only where applicable; supplier statements should not replace importer regulatory review
For paper, textile, detergent, or plastics use, confirm compliance documentation required by the buyer’s downstream sector, including restricted substance declarations if needed
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
Can you confirm the exact CAS number, EC/EINECS number, chemical name, and grade on the COA and SDS?
Is the listed ≥99% purity active content, dry basis assay, or another internal quality index? What test method is used?
Can you provide recent batch COA with moisture, insolubles, ash or salts, particle size, shade, and fluorescence strength data?
Is this material intended for paper brightening, detergent use, plastics/PVC, textile, or coating applications? Are separate grades available?
What is the recommended commercial packing for export: 25 kg drum, carton, bag, or customized packaging?
Can you supply a pre-shipment sample and retain sample from the same production batch?
What documents can be provided with shipment: SDS, TDS, COA, packing list, invoice, certificate of origin, and DG/non-DG transport statement?
What is the lead time for 1 kg sample, pilot order, and full container or pallet order?
Checks before quote
Obtain SDS, COA, TDS, commercial invoice, packing list, and certificate of origin before shipment
Confirm HS code, export declaration name, and whether the product is regulated as dangerous goods for the destination route
Check destination-market chemical inventory status and buyer-side import registration requirements before purchase
Verify CAS identity because source data contains application and EINECS inconsistencies
Ask for non-restricted use declaration only where applicable; supplier statements should not replace importer regulatory review
For paper, textile, detergent, or plastics use, confirm compliance documentation required by the buyer’s downstream sector, including restricted substance declarations if needed
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.
