 The threat from terrorism in Australia is real. Homemade explosives and toxic weapons can be made from chemicals many of us deal with in our everyday work. But we can all contribute to keeping Australia safe and secure. The National Code of Practice for Chemicals of Security Concern explains practical things you can do to help keep chemicals secure in your workplace. If you transport wholesale or work in a warehouse that stores chemicals there are things you can do to help build a chemical security culture. Be aware of the risks. Know the chemicals you work with, which ones are in the code and their legitimate uses. And know what questions to ask to help uncover suspicious activity in your business. Are new customers involved in legitimate use of the chemicals? Do they know what the chemicals are for? Are they buying an unusual amount or odd combination of chemicals? Do they insist on paying cash? Is a commercial quantity of chemicals being delivered to a residential property? Consider if there is anything odd about any online order. Have they made repeated orders in a short space of time? Or have you received emails asking unusual questions or requesting a strange delivery address? Secure your chemicals. Don't allow access to your storerooms, warehouse or truck to anyone that does not need to be there. And deal with spills or leaks. Only small amounts of some chemicals are required to make bombs. Be alert to other suspicious behaviors and activities. It could be out of the ordinary interest in transport routes, loads or trucks, at rest stops for example. Someone taking photos of the premises or having an unusual interest in your security arrangements. Missing stock or a staff member who tries to access restricted areas or regularly stays back late to be alone at work. You know your business and you know when something just doesn't feel right. Trust your instincts. Report your concerns to the National Security Hotline. You can help keep dangerous chemicals away from terrorists. Know the chemicals, know the risks, know the code. For a copy of the code go to nationalsecurity.gov.au slash chemical security.