Review (1/5): possibly unsafe
I was concerned by the label: "avoid contact with eyes, skin, clothing" and "intended for use as a solvent only". According to WebMD: It's important to note that DMSO is POSSIBLY UNSAFE when applied to the skin. There are reports that industrial-grade DMSO is being used for self-treatment of several disease conditions. Industrial-grade DMSO is not of the same quality as the DMSO that is used for drug research purposes since it may contain impurities. DMSO easily penetrates the skin and brings along impurities and other substances that may be hazardous to health.
DMSO is LIKELY SAFE when used as a prescription medication. Don't use products that are not prescribed by your health professional. There is concern that some non-prescription DMSO products might be “industrial grade”, which is not intended for human use. These products are POSSIBLY UNSAFE, as they can contain impurities that can cause health effects. To make matters worse, DMSO readily penetrates the skin, so it carries these impurities rapidly into the body.
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Also, therapeutic dosages used are lower than this cream, which is 99% (it might be too high):
"For prevention of some side effects of cancer treatment: 77-90% DMSO is typically applied under medical supervision every 3-8 hours for 10-14 days.
For shingles (herpes zoster): 5-40% idoxuridine in DMSO is within 48 hours after the appearance of a rash and applied every 4 hours for 4 days.
For nerve pain: 50% DMSO solution has been used 4 times daily for up to 3 weeks.
For osteoarthritis: 25% DMSO gel has been used 3 times a day, and 45.5% DMSO topical solution has been used 4 times a day."