Sodium hydroxide/methanol TS, Validity: 24 months

Sodium laurilsulfate (10 g/L) TS, Validity: 12 months

Sodium metabisulfite (50 g/L) TS, Validity: 24 months

Sodium metaperiodate TS, Validity: 12 months

Sodium molybdotungstophosphate TS, Validity: 12 months

Sodium nitrite (10 g/L) TS, Validity: 12 months

Sodium nitrite (100 g/L) TS, Validity: 12 months

Sodium nitrite (20 g/L) TS, Validity: 12 months

Sodium nitrite (3 g/L) TS, Validity: 12 months

Sodium nitrite (35 g/L) TS, Validity: 12 months