Sarin might be an effective battlefield chemical weapon, but questions of dispersal and access limit its effectiveness as a broad-scale terrorist weapon. In more isolated use, sarin can be deadly. Unlike chemicals such as ammonia that could be used in an attack, sarin was explicitly designed as a weapon. That gives it a number of advantages (and disadvantages) over other chemicals. On the positive side (from the point of view of the attackers) sarin was engineered for maximum damage. Sarin liquid quickly vaporizes once released into a colorless, odorless and tasteless nerve agent that disrupts the nervous system, causing paralysis and death. It also tends to cling to clothing for as long as an hour, potentially allowing contamination to spread. A leading problem with sarin — and indeed with all chemical vapors — is that they are at the mercy of wind conditions at the target site.