S 2256 (OTTO) Sodium peroxide, 90%+ Cas 1313-60-6 - used to bleach wood pulp for the production of paper and textiles. S 2256 (OTTO) Sodium peroxide, 90%+ Cas 1313-60-6 - used for specialized laboratory operations, e.g., the extraction of minerals from various ores. A powerful oxidizing compound used in laboratory applications.