pH 9.0 Standard @ 25°C Back Catalog number: 59628 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 58112 Magnesium (Mg) Price on request 13800-0100-100IO5 Di-n-hexyl phthalate, 100µg/ml in Isooctane, 5ml Price on request 677597 1,4-Dimethylnaphthalene, 100mg Price on request