FAQs

Question: Why has my pure liquid DMSO gone solid?

Answer: DMSO has a melting point of 18 degrees C. This means that in the winter or on cold days in the summer it can become  solid. This is also a useful test of purity. If you dilute pure DMSO it will not go solid even below 0 degrees C.

Question: Does DMSO have to be stored in glass bottles?

Answer: There is a common misconception that DMSO has to be stored in glass containers. It arises from the fact that over a long period DMSO can leach chemicals out of some types of plastic. However, HDPE ( high density polyethylene ) is suitable for the long term storage of DMSO and it is packed and shipped in this by the manufacturers. If you buy DMSO in plastic containers they should be HDPE.

Question: Is DMSO made from trees.

Answer:

DMSO is a sulphur compound, dimethyl sulfoxide. This used to be made from the waste product from the paper making process. This involved mixing wood pulp with sodium sulphide in order to break down the fibres. Dimethyl sulphide was separated from this waste material ( called black liquor ) and this was then treated to make dimethyl sulfoxide. Dimethyl sulphide is no longer made this way. It is now manufactured from hydrogen sulphide and methanol. This is a much more efficient process and results in a much purer product.

Question: How long does pure DMSO last? does it have a sell by date?

Answer: Pure DMSO does not have a sell by date. As a pure chemical compound it has a retest date to comply with the certificate of analysis. It practice stored in a closed bottle away from direct sunlight it can last for many years.

Question: What is difference between synthesis grade & technical and industrial grades of DMSO and this DMSO?

Answer: This synthesis grade DMSO is manufactured to a higher level of purity ( generally above 99.98% by GC ) than standard, technical and industrial grades and the quality control standards are more strictly adhered to. Synthesis grade is the highest grade of DMSO available to the general public