Two antimony compounds for process rather than metallurgical use: sodium antimonate, consumed as a polymerization catalyst and a glass fining agent, and colloidal antimony pentoxide, the synergist that lets halogen-free flame-retardant formulations work at practical loadings. Both became Chinese export-licence items from 2026, which changed the buying question from price to lead time — a shipment now carries a licence procedure in front of it, and we run that as part of supply. Where antimony sits in the broader sequence of Chinese materials controls is in our export-controls timeline; the contractual and Incoterms consequences of buying under a licensing regime are in the procurement-strategy guide.
Products
| SKU | Product | Application |
|---|---|---|
| NTS-SB-NA | Sodium antimonate | PET polymerization catalyst, glass fining |
| NTS-SB-CP | Colloidal antimony pentoxide | Flame retardant synergist for halogen-free formulations |
NTS-SB-NA — sodium antimonate
Supplied for its two consuming uses: a polymerization catalyst in PET production and a fining agent in glass melting. The two read a COA differently — a PET line watches the impurities that carry into the polymer, a glass tank what survives the melt — so state the application and we confirm the relevant limits against the lot.
NTS-SB-CP — colloidal antimony pentoxide
Antimony pentoxide in colloidal form, the synergist grade for halogen-free flame-retardant compounding. The colloidal form is the specification — dispersion in the polymer matrix is what it delivers over dry-powder pentoxide — so particle size in dispersion and solids content are the parameters to state and the ones to read first on the lot documentation.