Overview - ISO 3262-18:2023 (Precipitated sodium aluminium silicate)
ISO 3262-18:2023 is an international standard in the ISO 3262 series that defines specifications and test methods for precipitated sodium aluminium silicate, an amorphous silicate produced by reacting sodium silicate with mineral acid and/or an aluminium salt. The document sets essential quality criteria, sampling rules and laboratory procedures to assess chemical composition, physical properties and suitability as an extender in pigments, paints, coatings, rubber and related materials.
Key topics and requirements
The standard covers both requirements and validated test methods, including:
Applications and users
ISO 3262-18:2023 is intended for:
- Manufacturers and suppliers of precipitated sodium aluminium silicate and extenders for paints, coatings, inks and rubber compounds.
- Quality control laboratories performing routine acceptance testing and batch release.
- Formulators and R&D teams who need consistent raw material specifications for pigment/extender performance (dispersion, opacity, rheology).
- Procurement and compliance teams requiring standardized product specifications for supplier contracts.
Practical uses include material specification, supplier qualification, comparative testing and ensuring consistent performance in coatings, adhesives and rubber compounding.
Related standards
Keywords: ISO 3262-18:2023, precipitated sodium aluminium silicate, extenders, silica content test, oxide content, sieve residue, oil absorption, spectrometry, pigment standards.