Mr. Liddall asked
the Home Secretary what tests were carried out on the liquid "Incendex" in the extinguishing of incendiary bombs; and if these tests were carried out in conjunction with the inventors of the fluid?
§ Mr. H. Morrison
The Research and Experiments Department of the Ministry of Home Security tested "Incendex" liquid by applying it to a burning incendiary bomb through a stirrup hand pump. It gave no evidence of being more effective than water in dealing either with an incendiary bomb or the resulting fire, and it produced dense clouds of choking fumes, which made attack on the bomb difficult and caused a burning sensation on the skin. An analysis showed that the liquid contained 70 per cent. zinc sul-1516W phate. The fumes produced by such a solution in contact with burning magnesium in a confined space would, I am advised, handicap the person using it, and might be harmful. The answer to the second part of the Question is in the negative.