Instrument Standard 4 Back Catalog number: 53080 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677052 Tolfenamic acid, 100mg Price on request 1339.31-50-IO 17 alpha(H),21ß(H)-(22R)-Homohopane, 50µg/mL in isooctane, 1ml Price on request 676747 Sodium perchlorate monohydrate, 100 µg/ml, Water, Price on request