Buyer-facing sourcing candidate for SF-15 gypsum hardening accelerator, a white powder construction additive offered for gypsum-based materials where faster setting and improved surface hardness are required. Key checks before RFQ should include composition disclosure, CAS or mixture identifier status, dosage validation, fineness, drying loss, packing, shelf life, export documents, and non-DG confirmation.
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.
Model: SF-15Construction chemical additive / gypsum setting acceleratorRFQ-ready with composition and document verification required
Recommended dosage: 0.05%-0.5% based on gypsum mass, subject to buyer-side formulation testing
Curing temperature: room temperature
HS code shown by source: 3824409000
Production capacity shown by source: 5000 tons/year
Shelf life shown by source: 12 months from production date, with retesting suggested after expiry
Who uses this page
Target buyers
Gypsum board and gypsum product manufacturers
Dry-mix mortar and plaster producers
Construction additive distributors
Building materials formulators
OEM buyers for gypsum-based decorative products
Importers sourcing Chinese construction chemical additives
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
Standard packing shown: 25 kg paper-plastic composite bag / 25 kg paper bag
Package gross weight shown: 25 kg
Confirm palletization, liner type, moisture barrier, bag marking, batch coding, and container loading quantity before order
Confirm whether export packing can meet destination port and warehouse moisture-control requirements
Request photos of current commercial packing and label before shipment
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
Gypsum product manufacturing requiring shorter setting or demolding time
Gypsum sculpture, mold, block, and large-piece gypsum production
Gypsum-based dry-mix formulations where faster hardening is requested
Factory trials for improved surface hardness and production throughput
Distributor sampling programs for construction additive portfolios
How we compare
Sourcing options
Request 1-5 kg lab sample with SDS, TDS, and preliminary COA
Place pilot order only after formulation compatibility testing with local gypsum and water
Ask for 25 kg bag trial shipment with moisture-protected export packing
For bulk procurement, request palletized 25 kg bags with batch COA and pre-shipment photos
Compare SF-15 against alternative gypsum accelerators by setting time, strength development, moisture sensitivity, and cost-in-use
Human review
Compliance notes
Request TDS, SDS, COA, composition statement, and CAS number or mixture identifier confirmation before RFQ approval
Because the listing describes a functional gypsum additive rather than a single named chemical, confirm whether the product is a mixture and whether all reportable components are disclosed for import review
Confirm DG classification, UN number status if any, transport classification, and whether the product is shipped as non-dangerous goods
Verify destination-market requirements for construction additives, chemical inventory status, labeling, and customs declaration before purchase
Confirm HS code applicability with importer or customs broker; source-listed HS code should not be treated as a regulatory guarantee
Ask supplier to provide ISO9001 certificate copy and batch-level COA matching the shipped lot
For project use, require buyer-side performance testing against local gypsum, water quality, temperature, and production process
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 exact chemical composition and is SF-15 a single substance or formulated mixture?
Can you provide CAS number(s), SDS, TDS, COA, and composition declaration for import compliance review?
What is the active content or functional ingredient basis for the gypsum accelerator?
What are guaranteed specification ranges for drying loss, fineness, moisture, pH, insoluble matter, and any relevant impurities?
Is the product classified as dangerous goods for sea, air, or road transport? Please provide transport classification statement.
What is the recommended dosage range for different gypsum grades and what test data supports 0.05%-0.5% addition?
Can you provide sample quantities from the same production line as commercial batches?
What is the minimum order quantity, lead time, monthly available capacity, and export packing configuration?
Checks before quote
Request TDS, SDS, COA, composition statement, and CAS number or mixture identifier confirmation before RFQ approval
Because the listing describes a functional gypsum additive rather than a single named chemical, confirm whether the product is a mixture and whether all reportable components are disclosed for import review
Confirm DG classification, UN number status if any, transport classification, and whether the product is shipped as non-dangerous goods
Verify destination-market requirements for construction additives, chemical inventory status, labeling, and customs declaration before purchase
Confirm HS code applicability with importer or customs broker; source-listed HS code should not be treated as a regulatory guarantee
Ask supplier to provide ISO9001 certificate copy and batch-level COA matching the shipped lot
For project use, require buyer-side performance testing against local gypsum, water quality, temperature, and production process
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.
