Can hibiclens (Chlorhexidine) after hair transplant kill new recipient area grafts?

Hibiclens is an extremely strong chemical that is used to sterilize an area often before surgical procedures. While it may be understandable why you'd use hibiclens prior to surgery, I am not sure why you would use it after. The harshness of this chemical could be damaging to fragile newly planted grafts. I recommend meeting with your hair transplant surgeon ASAP to ensure you didn't cause any permanent damage to the recipient area. It is very important to read and follow your doctor's post-op care instructions carefully. What you do following your procedure can determine the final results of your hair transplant. 

You should not be washing hair with hibiclens.  It is written on the hibiclens not to use on your scalp.

It is not recommended to use Hibiclens for washing the scalp. It is a strong chemical which should not be used on freshly transplanted grafts. Make sure to follow the post op instructions carefully to ensure the success of your hair transplant. If you have used it, follow up with your surgeon to check the grafts and see if they are still viable. 

Hibiclins is not a good shampoo to use after a hair transplant but at a week, I guess you did not do any harm to it provided that all of the crusts were off