boguing - Good to hear you scored a satisfactory product. MoS2 is not a synthetic product, nor is it a product of the chemical industry.
MoS2 is a silvery black solid that occurs as the mineral molybdenite, the principal ore for molybdenum.
MoS2 has been in use as a lubricant since the early 1900's and it's noted for its ability to continue to lubricate when dry - long after any of the metallic soaps that make up the major constituent of grease, have dried out.
Graphite has similar lube qualities to MoS2 - but MoS2 is far superior in conditions where dry lube is needed.
CV joint lube has to endure some serious levels of lube requirements, and it's a highly satisfactory choice for most heavy-duty lube positions.
However, in positions where sand, dust and mud are thrown directly into the lubricated area, the dry spray MoS2 lube is a far better choice - because there's no grease to collect and hold the abrasive particles that abound in sand, dust, and mud.
When grease collects and hold these abrasive particles, a grinding paste is effectively formed, until the grease dries out and releases them.