Erowid is just quoting the Tihkal dosage suggestion.
http://rhodium.lycaeum.org (http://rhodium.lycaeum.org)
It is listed as alpha,O-DMS:
http://www.lycaeum.org/books/tihkal/05--ao-dms.shtml (http://www.lycaeum.org/books/tihkal/05--ao-dms.shtml)
Sounds like a most horrible drug. Low dosage meaning overdosing is easy. Lots of physical side effects like nausea and diarrhea. Sounds like an even nastier version of AMT. Ewww!