WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0719.10-K-IO cis-Decaline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 493-01-6 Price on request 3524.12-100 Vinclozolin, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 50471-44-8 Price on request 681183 4-tert-Butylphenol, 100mg Price on request