Supplier Page from Aladdin Scientific Corporation for Potassium dichromate Hue standard stock solution
(3-Ammoniopropyl)di-tert-butylphosphonium bis(tetrafluoroborate) from Aladdin Scientific Corporation
2-(piperidin-3-yl)acetic acid from Aladdin Scientific Corporation
Propargyl bromide from Aladdin Scientific Corporation
Sodium iodide from Aladdin Scientific Corporation