Pyridine, BioSyn. Suggested Application: Biosynthesis, Applications requiring low water content. Package Size: 20L. Container type is steel NOWPAK. CAS Number: 110-86-1. Hazard Class: 3. Package Group: II. Molecular Weight: 79.10. Density (g/mL) at 20C: 0.9832. Boiling point (C): 115.3. Freezing point (C): -41.6. Flashpoint (C): 20. Manufacturer Name: Burdick and Jackson. Manufacturer Part Number: BN333-20.; Size: 200L