Methyl Oxalyl Chloride CAS 5781-53-3 Fine Chemical Intermediate
Buyer-facing sourcing candidate for Methyl Oxalyl Chloride, also referenced as Methyl Chlorooxoacetate, CAS 5781-53-3. The source listing states 99% purity and AR grade, but overseas buyers should request batch-level COA, impurity profile, packaging confirmation, and transport classification review before RFQ approval.
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.: 5781-53-3Fine chemical intermediate / organic intermediateHuman review
Declared grade: AR / analytical reagent; buyer should confirm if industrial, research, or synthesis grade is available
Appearance, assay method, water content, acid chloride-related impurities, and residual solvent profile should be confirmed by COA
Specification consistency should be checked against CAS, molecular identity, and buyer’s internal acceptance criteria
Who uses this page
Target buyers
Fine chemical distributors
Pharmaceutical intermediate buyers
Specialty chemical importers
R&D reagent procurement teams
Contract research and development organizations
Industrial intermediate sourcing managers
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
Package and route
Packing notes
Source listing states packaging customization and transport package support
Request confirmed net weight options, inner container type, outer packaging, sealing method, and palletization details
Ask whether export packaging is compatible with the final confirmed transport classification
Confirm shelf-life, batch size, and whether unopened original packaging is available for overseas shipment
Request photos or packing list format for pre-shipment review
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
Sourcing evaluation for fine chemical intermediate supply
Specification comparison across CAS 5781-53-3 suppliers
Research or development procurement where buyer has approved internal protocols
Distributor catalog intake subject to compliance and DG verification
Custom specification RFQ for overseas chemical buyers
How we compare
Sourcing options
Request 99% purity stock-lot offer with recent COA
Request custom specification based on buyer impurity limits
Request small evaluation quantity before bulk procurement where legally permitted
Request third-party pre-shipment inspection for identity, assay, and packaging
Compare AR grade versus industrial intermediate grade pricing and documentation
Human review
Compliance notes
The listing states 'Non-Dangerous Goods', but this should be independently checked against current SDS, UN classification, carrier rules, and destination-country requirements
Request current SDS, COA, TDS or specification sheet, packing list, commercial invoice template, and certificate of origin if needed
Confirm HS code, export declaration description, and whether any destination-specific import permit or end-use documentation may be required
Do not rely on marketplace product attributes alone for DG, customs, or restricted-chemical determinations
Supplier business verification, batch traceability, and third-party inspection availability should be reviewed before order placement
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.
Methyl Oxalyl ChlorideCAS 5781-53-3Methyl Chlorooxoacetatefine chemical intermediate Chinaorganic intermediate supplier99% Methyl Oxalyl Chloridechemical intermediate sourcingCAS specification checkexport chemical supplier
Related product options
Build a broader quote package from adjacent options.
Buyers often compare neighboring grades, forms, or route options before sending one consolidated RFQ.
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 provide a recent batch COA showing assay method, water content, and named impurities for CAS 5781-53-3?
Is the quoted material 99% minimum purity, and is this by GC, HPLC, titration, or another validated method?
What grades are available: AR, industrial intermediate, research grade, or custom specification?
Can you confirm the exact synonym, molecular identity, and CAS match for Methyl Oxalyl Chloride / Methyl Chlorooxoacetate?
What packaging sizes are available for export orders, and what container materials are used?
What is the current SDS date, and what transport classification is shown by sea, air, and courier?
Can you support pre-shipment inspection, retained sample, batch traceability, and photo documentation?
What is the MOQ for export supply, lead time after payment, and available Incoterms?
Checks before quote
The listing states 'Non-Dangerous Goods', but this should be independently checked against current SDS, UN classification, carrier rules, and destination-country requirements
Request current SDS, COA, TDS or specification sheet, packing list, commercial invoice template, and certificate of origin if needed
Confirm HS code, export declaration description, and whether any destination-specific import permit or end-use documentation may be required
Do not rely on marketplace product attributes alone for DG, customs, or restricted-chemical determinations
Supplier business verification, batch traceability, and third-party inspection availability should be reviewed before order placement
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.
