Internal Standard Back Catalog number: 95665 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676811 Semicarbazide hydrochloride, 100mg Price on request 676147 8,9-Z-Avermectin B1a, 100 µg/ml, Acetonitrile, 1 Price on request 71156 Triethylene glycol Price on request