Wait until a while ring of solid ammonium chloride forms where the hydrogen chloride and ammonia gases meet. The ammonia gas, having a lower molecular weight than the hydrogen chloride, will diffuse ...

CCTV footage showed a hydrogen chloride gas cloud engulfing the atmosphere within 60 seconds and nearby schools were forced to close. | ITV News Meridian ...

A UK chemical manufacturing company has been fined £2.5 million following two incidents of uncontrolled releases of highly ...