(2)Cylinders containing obnoxious or poisonous gases shall not be provided with any safety device.Explanation .-For the purpose of this sub-rule, "obnoxious or poisonous gases" include Carbon monoxide, Hydrocynic acid, Hydrogen chloride, Hydrogen bromide, Hydrogen fluoride, Sulphur dioxide, Chlorine, Methyl bromide, Nitrogen tetraoxide, Nitrosyl chloride, Town gas, Hydrogen sulphide, Carbonyl chloride (Phosgene), Cyanogen, Cyanogen chloride, Fluorine and Carbon oxychloride.
