We have consulted with experts on chemical safety, and the reagent is safe to use with suitable precautions. The main component is alcohol and therefore it is flammable and can irritate the skin. Using similar safety precautions as with for example bathroom cleaning agents etc is advised (well-vented area, for safety wear glasses, do not look into flashlight, do not spray towards or onto people, do not spray towards warm objects, electricity cables, etc.).
Although the spray is safe, the kit should be kept out of reach of children, it should be avoided that children inhale the spray and of course, it should not be sprayed on items that the child will touch and put in its mouth. Also, the UV can harm the eyes when looking into the light directly.
Besides extensive consultation with safety experts, we have also used the test extensively ourselves in and around our houses for more than 3 years. NGOs also have already used our test in many locations around the world.