BORAX
Borax Toxicology Sheet
Boraxfree.com
Is borax safe or not?
Borax: Not the green alternative it's cracked up to be
Boron deficiency
WebMD - Boron
WASHING SODA
Washing Soda (Sodium Carbonate) Toxicology Sheet
BAKING SODA
Baking Soda (Sodium Bicarbonate) Toxicology Sheet
It seems to depend on how much you use, what you are using it for, and if there is enough of a residue left that could be inhaled or eaten. These chemicals are potentially harmful by themselves, but most of the time they are diluted with something else. Caution needs to be used to make sure these chemicals are not being inhaled or eaten in any significant amounts, especially by pets or children.
One way to prevent inhalation is to mix these outside or in a well ventilated area and slowly add them to prevent the dust from becoming airborne. Another way would be to dilute them in water, i.e. instead of making a powder form of laundry detergent, make a liquid form.