What product out will whiten dentures?

Clorox bleach. Clorox bleach will whiten acrylic dentures but best to dilute it with water first.
None. There are no whitening products for dentures. The best you can do is take them to your dentist for a thorough ultrasonic cleaning and repolishing. You will be charged a fee for this. You might need to get new teeth to get the look you desire.
See your dentist. Have your dentist use the ultrasonic cleaner and then have him pumice and polish them.
Best to ask... Best to ask the dentist who made your dentures, as materials can vary.