Whether or not it contains bleach (specifically, ingredients like sodium hypochlorite) is unlikely. Hair dyes typically use hydrogen peroxide as the lifting agent, not bleach.
To be absolutely sure, you need to check the ingredient list on the specific Scruples blonde hair dye product you are using. Look for ingredients like:
* Hydrogen Peroxide: This is the most common lifting/lightening agent in hair dye.
* Ammonia or Ethanolamine: These open the hair cuticle.
* Sodium Hypochlorite: This is the chemical name for bleach. If this is on the list, even in small quantities, it is best to avoid.
If you're concerned about damage from lightening, consider:
* Demi-permanent dyes: These deposit color without as much lifting action (and thus less potential damage).
* Consulting a professional: A hairdresser can assess your hair and choose the best product and process for your desired blonde shade.
In summary: it probably has peroxide, but not bleach. CHECK THE INGREDIENT LIST ON YOUR SPECIFIC PRODUCT.