A person never needs to have bleach in contact with their face or any part of the body.
It depends on where you are. Heres a list of how long different records should be kept. I think this is in the UK
Medical records should be kept for as long as required based on the type of record, and federal/state laws.
To effectively sanitize bath toys, they should be soaked in a bleach solution for at least 5 minutes.
It will not hurt as long as it is on the hair. You should not touch the scalp or your hands with it as it will burn and you should never use household bleach because your hair will dissolve in it.
It should be kept for the life of the individuals involved in the legal matter, in a water and fireproof storage area. It should be kept because it may be needed.
Hair bleach does not stay active for very long once it has been mixed. It begins to lose strength quickly and should be used within an hour.
forever
Hard boiled eggs should be kept in the fridge for up to one week.
Ultraviolet light is almost as effective as chlorine as far as the ability to bleach cloth goes.
Most likely, if you used dye, it stands on the package
45-60 mins MAX
Most facials should be left on for 30-50 mins for a relaxing day! But if you need a quick one you should only leave it on for 10-20 mins