You should not use anything after it has expired, not even one or two days.
Yes, contact lenses can be harmful to your eyes. If you take it out and scratch it, it will cause irritation and your eyes will go red. Also, if your solution on the contact lenses are hurting, take them out straight away and wash your eyes.
you will have a very bad rash
Wash you hands
Yes It has been proven certain chemicals in the body wash CAN be harmful in certain circumstances. My best advice is to stick with bar soap.
Hydrochloric acid
You must wash your hands after an experiment so you don't contaminate yourself with anything harmful.
Ask a doctor, mentioning the chemical; generally: - for acid solutions: wash with a diluted basic solution - for basic solutions: wash with a diluted acidic solution
Kidney beans are very harmful if you do not wash them and cook them.
Plasmid isolation has a step called washing step that carried out in the column in which the plasmid DNA are already bind. There are two wash solution, first one endo wash buffer that wash the traces of bacterial membrane remnants such as LPS. Wash buffer two has ethanol wash off any protein contaminants present on the column. These wash steps ensure the purify of isolated plasmid DNA.
A wash bottle containing a solution of alkali can be used to neutralize acids on surfaces or equipment. It can also be used to rinse or clean glassware in a laboratory setting.
Hand washing solution are also basic.