Borosilicate / specialty glass
Process Role: B₂O₃ source; flux and thermal-property control Critical Procurement / Engineering Parameters: B₂O₃ content, Fe/colour impurities, hydrate form
Borax decahydrate is a refined sodium borate supplied as white crystalline material and used as a source of B₂O₃, a mild alkaline buffer and a fluxing/functional additive. The key procurement distinction is hydrate form: decahydrate, pentahydrate and anhydrous borax have different B₂O₃ content, bulk density and logistics economics and should not be treated as equivalent grades.
For GCC and MENA buyers, technical suitability should be confirmed before shipment. OGSCM can coordinate specification review, manufacturer documentation, packaging format, batch traceability, dangerous-goods requirements where applicable, cross-border logistics and receiving-site constraints. Product claims such as food grade, pharmaceutical grade, oilfield grade, REACH/FCC/USP compliance or OEM approval should only be used when documented for the actual offered grade.
| Property | Value |
|---|---|
| Common name | Borax decahydrate |
| Formula | Na₂B₄O₇·10H₂O (also represented in hydrated borate structural notation) |
| CAS | 1303-96-4 |
| Molar mass | 381.37 g/mol |
| Appearance | White, free-flowing crystalline material |
| Specific gravity | ≈1.71 |
| B₂O₃ theoretical content | ≈36.51 wt% |
| Water behaviour | Soluble; forms mildly alkaline borate solutions |
| Thermal behaviour | Begins losing water of crystallisation on heating; do not treat 75°C as a simple stable melting point |
| Transport | Typically not regulated as dangerous goods; verify supplied SDS |
Values shown are reference/typical values, not a sales specification. Final acceptance must be based on the offered manufacturer grade, test method, COA and buyer specification.
Process Role: B₂O₃ source; flux and thermal-property control Critical Procurement / Engineering Parameters: B₂O₃ content, Fe/colour impurities, hydrate form
Process Role: Buffer, builder/booster, enzyme-stabilising support Critical Procurement / Engineering Parameters: Alkalinity, solubility, particle size
Process Role: Dissolves metal oxides and supports fluxing Critical Procurement / Engineering Parameters: Hydrate form, particle size, impurity limits
Process Role: Buffering / corrosion-inhibition support Critical Procurement / Engineering Parameters: Hydrate form, particle size, impurity limits
Process Role: Starch/casein system modification Critical Procurement / Engineering Parameters: Reactivity, particle size, solution preparation
Process Role: Buffer/crosslinking-related borate chemistry in selected systems Critical Procurement / Engineering Parameters: Exact product and field formulation
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