It sounds like you don't have much chemistry lab experience. You will kill yourself and others around you. Stay away from H2S. If you need to test your mq136 once you have it running do so using flatus.
It sounds like you don't have much chemistry lab experience. You will kill yourself and others around you. Stay away from H2S. If you need to test your mq136 once you have it running do so using flatus.