LAS is the chemical name for any chemical

Sodium linear alkylbenzene sulfonate.

Lanthanum is a silvery-white soft metal that is malleable. Chemically reactive. Can interact with water.

Soluble in dilute acids. It is easy to oxidize in the air; Heating can burn and produce oxides and nitrides. Hydride is formed by heating in hydrogen.

It is the second most abundant element of rare earth elements and is often found in monazite and fluorocarbon strontium lanthanum along with other rare earth elements. It is one of the radioactive products of uranium, thorium, or plutonium fission. It can give the glass special refractive properties, so that the glass has a high refractive index.

Element**. The preparation of lanthanum is generally obtained by dehydration of lanthanum chloride hydrate and reduction with metal calcium, or by electrolysis of anhydrous lanthanum chloride after melting.

It rapidly tarnishes in moist air to form a colorless compound, which is found in rare earth minerals and is often grouped within the rare earth group and is a major component of mixed rare earths.

element uses. It can be used as an alloy or as a catalyst.

For this reason, it is often used to manufacture expensive camera lenses. 138LA is radioactive, has a half-life of years, and has been tested for ** cancer.

la lanthanum: atomic number 57, atomic weight.

la is the elemental symbol for lanthanum metal.

Lanthanum is the first element of the lanthanide series, which is also known as rare earth elements because of its similar properties.

Very versatile. Lanthanum ions are loaded in molecular sieves.

It is a catalyst for the cracking of heavy oil in petrochemical industry, which can crack heavy oil into gasoline, propylene and other light oil and petrochemical raw materials. It is also widely used in electronic products, magnetic materials and other fields.

Foam is an aggregate of bubbles separated from each other by a liquid film, and is a dispersion system of gases in liquids, with an internal phase (gas) generally greater than 90% volume fraction. It is usually polymers, mixtures.

The main raw materials of plastic foam are polystyrene, talc, calcium stearate, butane, etc.

The two main ingredients in foam fire extinguishers are Al2(SO4)3 solution and NaHCO3 solution. When the two solutions are mixed, a mutually reinforcing hydrolysis reaction can occur.

The result is Al(OH)3 precipitate and CO2 gas.

The main components of foam in detergents are generally surfactants, and their molecular structure is composed of non-polar lipophilic (hydrophobic) groups and polar hydrophilic (oleophobic) groups, forming so-called "amphiphilic structure" molecules that are both hydrophilic and lipophilic. Lipophilic groups can be aliphatic hydrocarbon groups, alicyclic hydrocarbon groups and aromatic hydrocarbon groups or aliphatic hydrocarbon groups, alicyclic hydrocarbon groups and aromatic hydrocarbon groups with O, N and other atoms; The hydrophilic groups are generally carboxylic acid groups, hydrocarbon groups, sulfonic acid groups, sulfuric acid groups, phosphonic acid groups, amino groups, nitrile groups, thiol groups, halogen groups, ether groups, etc. Common foaming agents include hydroxyl compounds, ethers and ether alcohols, pyridines and ketones.

It doesn't feel like a pointless question.