S 2258 (OTTO) Sodium peroxide, GR 95% Cas no 1313-60-6 - used to bleach wood pulp for the production of paper and textiles. S 2258 (OTTO) Sodium peroxide, GR 95% Cas no 1313-60-6 - used as a deodorant and an analytical reagent. It is also useful in scuba gear and in submarines.