§ Mr. DalyellTo ask the Secretary of State for the Environment what chemicals involved in the production of water filtering equipment, referred to in his letter of 22 March to the hon. Member for Linlithgow, may be diverted to military use.
§ Mr. Needham[holding answer 28 March 1994]: I have been asked to reply.
Possible military uses of the chemicals approved in the United Kingdom for addition to the water supply for the purposes of purfication are in the table:
139W
Chemical Use in water purification Possible military use Calcium Hypochlorite Disinfectant None known Chlorine Disinfectant Historically this has been used as a 'poison gas'. Chlorine Dioxide Disinfectant None known Hydrogen Peroxide Disinfectant If the concentration is greater than 85 per cent. then it may be used as a fuel additive. Sodium Chlorite Disinfectant None known Sodium Hypochlorite Disinfectant None known