Potassium Dichromate in crystal form is considered a hazardous material over the amount of 25gms. 25 gms can go thorugh USPS, all other amounts, please select UPS ground at check out. Someone will contact you otherwise.
Potassium Dichromate in solution form can be shipped through the post office.
For our Foreign customers, if you wish to purchase any kind of dichromate, it must be in solution form.