Vinegar is a liquid consisting of about 5–20% acetic acid (CH3COOH), water and some other components for flavour. The acetic acid present in vinegar helps in curbing the growth of microbes and germs, and thus it can be used for pickling as well as cleaning. Regarding its shelf life also, vinegar's acidic nature allows it to last indefinitely without the use of refrigeration. This property also makes it the most attractive and loved product for cooking and cleaning. But there are some places where it cannot be used because of its acidic nature. Here is a complete analysis of why vinegar is an excellent cleaning product and where its use is restricted.   https://www.bondcleaninginmelbourne.com.au/vinegar-cleaning-product/