pH 12.0 Standard @ 25°C Back Catalog number: 50127 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 56033 Arsenic (As) Price on request 98864 Formaldehyde-DNPH Level 7 (20ug/mL) Price on request 97958 Method 525.2 Solution B Price on request