0
It's commonly called stearyl alcohol. The chemical formula is CH3(CH2)16CH2OH
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is the formula for liquid solar pool cover?
Stearyl Alcohol (octadecanol), isopropyl alcohol, water. See United States Patent 6943141 for more details: Exerpt from this patent: ".................mixing the azeotrope of isopropanol and water with up to 5% octadecanol by weight of the total solution, in order to dissolve the normally solid-phase octadecanol and thereby produce a liquid evaporation retardant solution, which, if desired can easily be rendered more storable and transportable than usual at low temperatures merely by adding n-butanol at 10% by weight of the pre-made solution." Actually there are several methods depending on the manufacturer of the product, the primary ingredient is Isopropanol Alcohol as a carrier with some small amount of active ingredient, the active ingredient can be Octadecanol, Calcium Hydroxide or other proprietary chemicals. The idea was originally derived from a method to keep drinking water from evaporating, see this patent for more information: http://www.google.com/patents?id=M-4HAAAAEBAJ&dq=U.S.+Pat+6,303,133 These blends vary from manufacturer to manufacturer and the exact nature is often not listed or disclosed as trade secrets.
Why is the temperature expected to remain constant during the thermal arrest?
I think you must mean the 'latent heat of fusion' experiment where a change of state in the cooling curve of a hot liquid like naptha or Octadecanol. the liquid cools as expected until the liquid starts to solidify. The temperature drop is arrested as the crystallisation process emits latent heat. Having solidified it then cools as expected.
Does Methylparaben Propylene Glycol propyl paraben sodium lauryl sulfate stearyl alcohol safe to your skin?
That's not a single compound, it's a group of compounds. We'll take them one at a time. Parabens, including methylparaben and propylparaben, act as an effective preservatives in many cosmetics and beauty products. They are known for their bactericidal and fungicidal properties. However, studies indicate that methylparaben applied on the skin may react with UVB to increased skin aging and DNA damage. There is also a possibility of carcinogenicity effects (cancer-causing) over the continued used of paraben-containing products. Propylene glycol: fairly innocuous. In high enough concentrations it may cause skin irritation, and don't swallow it. SDS (sodium lauryl sulfate ... the D is for "dodecyl," the IUPAC equivalent of "lauryl"): In pure form it's a skin irritant. In low concentrations, it's probably okay for most people who aren't exceptionally sensitive to it; it's a common ingredient in shampoos. Stearyl alcohol: AKA octadecanol. It's about the same level of hazard as propylene glycol. Don't pour the pure stuff on yourself, but if it's in a product intended for use on skin it's probably fine. All of these things look like they're in some kind of skin or hair care product, which has probably been extensively tested because the company making it doesn't want to get sued. Follow the directions, don't fill a bathtub with it and immerse yourself for hours at a time, don't squirt it in your eyes or swallow it, and you should be okay.
