Chemicals traders want so usually a Endverbleibsnachweis For substances "Kragenweite" have what is not necessary when sulfuric my knowledge in this amount. In this respect, here the supplier does everything right and provides fast and unbureaucratic.
Unfortunately, and there is the star trigger, can be seen neither from the item description or from the account of the state of cleanliness; and the label of the bottle also is silent on the subject. I suppose at the low price that they are "technical quality", but should be sufficient for most purposes.
Conclusion: Any time again!
