Phenolphthalein/pyridine TS, Validity: 12 months

Phenylhydrazine hydrochloride (10 g/L) TS, Validity: 12 months

Phenylhydrazine/hydrochloric acid TS, Validity: 12 months

Phosphate buffer, pH 4.0, TS, Validity: 12 months

Phosphate buffer, pH 6.4, TS, Validity: 12 months

Phosphate buffer, pH 6.9, TS, Validity: 12 months

Phosphate buffer, pH 7.0 (0.067 mol/l), TS, Validity: 12 months

Phosphate buffer, pH 7.0, TS, Validity: 12 months

Phosphate buffer, pH 7.2, TS, Validity: 12 months

Phosphate buffer, pH 7.4, TS., Validity: 12 months