Cyclic silazane monomers are the defined building blocks of polysilazane chemistry: single-structure Si-N rings with public CAS numbers, supplied at ≥96% purity. Where polymer grades give you finished properties, monomers give you control — ring-opening polymerization builds high-purity precursors to exactly the molecular weight and architecture your process defines.
Two forms cover process preferences: SILZ-CY-3 (HMCTS) is the liquid trimer for direct dosing and reaction; SILZ-CY-4 (OMCTS) is the crystalline tetramer with a sharp 225 ± 2 °C boiling point for distillation-based purification workflows. Both feed PV and semiconductor protective-coating supply chains and, blended with methylhydrosilazane, the Si-C-N ceramic fiber route.
| Grade | Product | Appearance | Purity | Molecular Weight | Physical Form |
|---|---|---|---|---|---|
| SILZ-CY-3 | 2,2,4,4,6,6-Hexamethylcyclotrisilazane (HMCTS) | Colorless transparent liquid | ≥96% | 218–221 | Liquid cyclic trimer (HMCTS) |
| SILZ-CY-4 | 2,2,4,4,6,6,8,8-Octamethylcyclotetrasilazane (OMCTS) | White crystalline solid | ≥96% | 290–295 | Solid cyclic tetramer (OMCTS) |
Comparison values from each product's TDS; “—” = full datasheet on request. Grades without a link are being migrated to the new site.
Liquid CY-3 doses straight into reactors; solid CY-4 suits plants that meter solids or purify by distillation against its defined boiling point.
Trimer versus tetramer changes ring-opening kinetics and the repeat-unit bookkeeping of your polymer design — most routes qualify one as primary and the other as alternate.
Both carry public CAS numbers, ≥96% purity, TDS/SDS and batch COA. Semiconductor-bound purchases can discuss qualification lots with tighter windows.
Ceramic Precursors & Advanced Ceramics
No. Si-CH₃ groups cure poorly alone; monomers are blended with reactive organosilazanes (like SILZ-701) for curable films, or polymerized into precursors first. Their value is synthesis control, not direct film forming.
Si-N rings hydrolyze on moisture contact, which costs purity. Handle under dry or inert conditions, keep containers tightly sealed, and use dry transfer equipment throughout.
Yes — evaluation quantities ship from 1 kg, and production volumes are quoted with lead time and specification agreements. State your annual demand and target spec for a supply proposal.
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