This reagent can only be manufactured using concentrated sulphuric (sulfuric) acid (>85% concentration but ideally 95-98%).
Concentrated sulphuric (sulfuric) acid over 15% has been made illegal to have in ones possession unless your are a Business (with a requirement for that restricted chemical) or you have a valid EPP licence purchased from the Home Office (takes ~ 28 days) and costs over £30.
As such we can ONLY sell this reagent to individuals/businesses that meet the above requirements.
Possession of such a restricted chemical in any amount (even less than 0.1mL) is an offense with a prison sentence, up to 2 years, and or a fine.
If you wish to purchase this reagent then please contact us directly to discuss.
The Froehde reagent is used as a simple spot-test to presumptively identify alkaloids, especially opioids, as well as other compounds. It is composed of a mixture of molybdic acid or a molybdate salt dissolved in hot, concentrated sulfuric acid, which is then dripped onto the substance being tested.
Unheated sulfuric acid can be used to prepare the reagent in a less dangerous manner, but 2–4 hours must be allowed for the molybdate to dissolve.