do you mean "CLR® CALCIUM, LIME & RUST REMOVER" ? looking up the MSDS for that...
https://clrbrands.com/en-US/Products/CLR-Household/CLR-Calcium-Lime-Rust-Remover
Directions:
In a well-ventilated area, mix equal amounts of CLR and warm water. Test on a hidden area before applying to the entire surface, Apply directly to the stain with a brush, cloth, or sponge. After 2 minutes, rinse promptly with cold water. Never leave CLR on an area for longer than two minutes. Never mix CLR with other household cleaners or bleach. Always read the manufacturer's directions of the item you will be cleaning to make sure that this product is compatible. Consumer discretion is always advised.
CLR may etch older sinks, tubs, and tiles. Avoid contact with wood, clothing, wallpaper, and carpeting. Some laminated surfaces (counter tops) are coated with a synthetic surface which may be affected by rust removes; clean spills immediately.
Ingredients
Lactic Acid
Lactic acid is found in many yogurts and cheeses. It is also produced in the muscles during intense activity. Commercially, it is produced by fermentation of simple sugars. In cleaning producs it functions as a chelating agent; a compound that makes metals more soluble in water. As part of the EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients
Lauramine Oxide
Name for a surfactant. Is used in cleaners to modify the surface tension of water, to aid in even spreading and to allow mixing with oil and dirt so that they can be rinsed away; it is included in many soaps, detergents, and several groups of antiseptics. As part of the
EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.
Gluconic Acid
This ingredient is an acid formed from the sugar glucose, which naturally occurs in fruit, honey and wine. It is a chelating agent; a compound that makes metals more soluble in water. As part of the EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.
Tripropylene Glycol n-Butyl Ether
Name for a solvent used to slow down the evaporation of many liquid products including oven cleaners and inks for ball-point and felt-tip pens. It is very effective at absorbing organic material. As part of the EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.
Yellow No. 5
A synthetic lemon yellow dye used all over the world, primarily as food coloring. As part of the
EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.
Blue No.1
A blue dye used for foods and other substances. As part of the
EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.
Water
Reverse Osmosis (RO) is a water treatment process that removes contaminants from water by passing the water through a membrane, (filter), where contaminants are filtered out yielding more pure quality water.