California Gas Additive Standard Back Catalog number: 98646 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50781 Alkalinity as Calcium Carbonate Price on request 2529.13-100-ME 2-Acetyl-6-methoxynaphthalene, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3900-45-6 Price on request 0048.16-100-T 4-Nitropyrene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 57835-92-4 Price on request