Reference number
ISO 1689:1976
ISO 1689:1976
© ISO 2025
International Standard
ISO 1689:1976
Sodium and potassium silicates for industrial use — Calculation of the ratio : silicon dioxide/sodium oxide or silicon dioxide/potassium oxide
Edition 1
1976-02
1976-02
ISO 1689:1976
6305
Published
(Edition 1, 1976)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The document specifies the formula for the calculation. In this ratio, only sodium oxide and potassium oxide combined in the form of silicates is considered. Replaces ISO Recommendation R 1689-1970.