Lecture bottles and hazardous specialty gasses

Lecture bottles are small compressed gas cylinders, typically 2-3 inches in diameter. They are non-refillable and purchased outright from the vendor. Lecture bottles are the university's responsibility to properly dispose. They are useful when particularly hazardous gasses (health hazard  3-4) or expensive analytical standards are needed. Common lecture bottle gasses include: 1,3-butadiene, acetylene, low boiling amines, carbon monoxide, butenes, hydrogen halides and dihalide gasses.

Storage: Store lecture bottles upright as they are more susceptible to damage and leaks on their sides. Regulators must be removed during storage and the cap must be secured on the cylinder. Hazardous gasses must be stored in a ventilated gas cabinet or secured in a fume food. Acid cylinders have a short shelf life due to corrosion, the worst of these acids being HF which must be disposed of within 2 years.

Use: Inspect lecture bottles, connections and regulators prior to use then properly secure upright in a fume hood (if not already). A specific lecture bottle regulator compatible with the gas must be used. Lecture bottles typically use universal threads and valves, therefore it is important to label equipment used with the gas to prevent mixing of incompatible materials. A regulator of a corrosive gas should be purged in the hood so residual gas is expelled. The regulator can be flushed with dry N₂ gas for 30 minutes before storage.

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