Following up on the web site that Alok found the MSD for KleenHeat, I found this comparison of the fuels for back packking stoves:
"K-1 (low sulfur kerosene) (may have red dye)
This is a low-sulfur kerosene approved for use in nonflue-connected (ventless) kerosene burner appliances and for use in wick-fed illuminating lamps, space heaters, etc. This is the best kerosene choice for stoves. K1 is often referred to as Kero, but Jet A (with toxic additives) is also sometimes sold as Kero.
Odorless Kerosene (Klean-Heat, Deobase, odorless mineral spirits)
This is kerosene that has been "sweetened" with most of its mercaptans (sulfur compound) and aromatics removed. It supposedly burns cleaner, odorless, with less smoke and soot. It may also have a narrower molecule range (C9-C12), higher flashpoint than K-1 (125°F or greater vs. ~100°F) and a much higher price.
K-2 (regular kerosene)
Has a higher sulfur content than K1.
#1 Fuel/Heating/Gas/Burner Oil. (may have red dye) (Not Recommended)
This fuel has high sulfur levels. This fuel is designed for use in conventional pressure and air atomizing domestic oil burner systems such as in domestic and small industrial space heaters and burners. Number 1 Fuel Oil is particularly adapted to vaporizing type burners or where storage conditions require low pour point fuel."
I have mostly used "liquid candle" which is highly refined k1 type of product--but also have K1, mineral spirits and Kleen heat. During this winter I will experiment with the various fuels. The Kleen Heat was about $9 a gallon at Home Depot Pensacola. K1 in a 5 gallon can was $36.00 at Lows. I got some odorless lamp oil from Wal Mart for $1.50 a quart during hurricane season and the Mineral sprits was about $5.50 at Wal mart.