Botulinum toxin is usually made of Neurotoxin There is the form and composition of the hemagglutinin. Botulinum toxin type A The pure product is a white crystalline powder, soluble in water, but its stability is poor. Heating, mechanical force and the role of oxygen and degradation. Powdered toxins can be stored for long periods of time without loss of activity, botulinum toxin contamination of food and water, its toxicity can keep a few days or a week, botulinum toxin was not damaged by gastrointestinal fluid, Yijing digestive tract poisoning.