Nitrite as (NO2-) Back Catalog number: 50402 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended SCP150-012-010 CONOSTAN S-12 Standard, 100 ppm, 200g Price on request 92387 EPA Method 8141 Surrogate Standard Price on request 23002 EPA Method 8260B Surrogate Standard Price on request