Answer:
Characteristics Steam Chlorine Iodophor QUATS* AAS**
Gram-positive bacteria Best Good Good Good Good
Gram-negative bacteria Best Good Good Poor Fair
Spores Good Good Poor Fair Fair
Yeasts and molds Best Good Good Fair Poor
Bacteriophage Best Good Fair Poor Poor
Optimum pH N/A 4-5 3 10 2-2.5
Penetration Poor Good Poor Good Excellent
Corrosive No Yes Slight No Slight
Irritation N/A Yes No No Yes
Hard water affects No No Slight Yes/No Slight
Shelf-life N/A Short Long Long Long
Organic matter affects No Yes Slight Low Slight
Stable in 140°F H2O N/A No No Yes Yes
Leaves residue No No Yes Yes Yes
Flavor/odor No Yes Yes No No
Ease of use Poor Excellent Excellent Foam Foam
Use with detergent No No/yes Yes No/yes No
Maximum use by FDA/USDA None 200 ppm*** 25 ppm**** 200 ppm***** 200-400 ppm
Cost High Low Moderate Moderate Moderate
Where to use Equipment Equipment, floors, walls Rubber, plastic crates Aluminum, walls, floors Stainless steel, CIP
