Sodium hydroxide is also used in the production of viscose rayon.

sodium hydroxide analysis given below serves to elaborate on their differences.
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Caustic soda is a solution of Sodium hydroxide (NaOH) in water.

Caustic soda is used in the manufacture of products which form part of our daily lives and in applications or uses as varied as the pulp & paper, detergents, the chemical, building and car industries, packaging, agriculture, environmental protection, water treatment, foodstuffs, health and textiles, and so on.

Sodium hydroxide provides fuctions of neutralisation of acids, hydrolysis, condensation.
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Synonyms for lye arecaustic soda, and sodium hydroxide.

To make soap you take a transfatty acid or triglyceride (oil or kitchen grease) and blend it with a solution of sodium hydroxide (NaOH, caustic soda or lye) and water.

The major use of sodium hydroxide is as a chemical and in the manufacture of other chemicals.
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In Europe, medieval soap production centered around Marseilles and spread to Genoa and Venice. In England, there was soap production in Bristol as early as the 12th century. In the 13th and 14th Centuries, it started in Cheapside in London. Soap was seen as a great source of revenue by the government and it was taxed. During the Napoleonic wars this tax was as much as 3d per pound, and the tax inspectors would lock up the soap boiling pans to stop illegal production at night.

Sodium hydroxide is used mainly for two processes in textile manufacture.
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Sodium Hydroxide | Uses, Benefits, and Chemical Safety …

Baking Soda (sodium bicarbonate) has the ability to neutralize acidic pH levels creating a natural deodorizer. Softens skin and soothes irritated skin.

Sodium hydroxide, caustic soda production using …

More widely used than simple alkyl sulfates are various types of sodium alkyl ether sulfates (SLES).
In the manfacture of SLES the primary alkyl alcohol (from a synthetic or natural source and typically a blend based around dodecanol) is first ethoxylated with 1 to 3 molar equivalents of (as described below for the manufacture of nonionic surfactants). The product is then sulfated using sulfur trioxide and neutralized with alkali to form the alkyl ether sulfate:

on “ Sodium Hydroxide (NaOH) vs

fur from the sable marten, a small carnivorous mammal
derived from the leaves of wintergreen, meadowsweet, willow bark or other plants. It can also be produced synthetically by heating with carbon dioxide
insect secretion
cloth made from the fiber produced by the larvae ('silk worm') of certain bombycine moths, the harvesting of which entails the destruction of the insect the sodium salt of alginic acid extracted from brown seaweed.
white solid used as an acidity regulator in foods. It is mainly used in the manufacturing of baking powder. Produced by combining and .
the sodium salt of . Produced by reacting with . Used as a food preservative. bicarbonate of Soda
Soda Ash. A sodium salt of .
chemical term for table salt. It can be mined (rock salt), obtained by adding water to salt deposits (evaporated salt) or obtained from oceans and salt lakes (sea salt).
Caustic Soda. A water-soluble solid usually produced by processing salt water. It used to be obtained from the ashes of a certain kind of seaweed.
the sodium salt of
the sodium salt of sulfated ethoxylated
prepared by sulfation of followed by neutralization with
an inorganic salt. White to yellowish powder with sulfur dioxide odor. Used as a disinfectant, antioxidant and preservative.
synthetic material generally prepared by the partial or total neutralization of using or .
prepared from and
the sodium salt of .
white powder obtained from fruit or produced synthetically
derived from raw materials of vegetable origin. Commercially known as Span 20
manufactured by reacting with to yield a mixture of esters. Commercially known as Span 60
derived from animal or vegetable sources. Commercially know as Span 80. The vegetable derived version is know as Span 80V
derived from raw materials of vegetable origin. Commercially know as Span 40
derived from animal or vegetable sources. Commercially known as Span 65. The vegetable derived version is know as Span 65V
derived from animal or vegetable sources. Commercially know as Span 85. The vegetable derived version is known as Span 85V
a sugar alcohol derived from fruit like cherries, plums, pears, apples or from corn, seaweed and algae
also known as "starter culture", "sourdough culture" or "sour culture". It is usually made with a mixture of flour and water inhabited by yeast and lactobacteria containing no animal ingredients. Sometimes yogurt is used in the starter. Bread made from a sourdough culture is called sourdough bread
oil found in the head of the various species of whales
fatty substance derived as a wax from the head of the sperm whale
aquatic animal or colony of animals of a 'low order', characterized by a tough elastic skeleton of interlaced fibers
found in the liver of the shark (and rats)
a complex carbohydrate found in seeds, fruits, tubers, roots and stem pith of plants such as corn, potatoes, wheat, beans and rice.
salt of stearic acid
fat from cows, pigs, sheep, dogs or cats. Can be obtained from vegetable sources
general name for the three glycerids (monostearin, distearin, tristearin). Formed by the combination of and , chiefly applied to tristearin, which is the main constituent of tallow or suet
prepared from sperm whale oil or vegetable sources
made from and
obtained by reacting with an edible fat or oil with or without the presence of a solvent
known under the brand name Splenda. It's produced from . Some but not all Splenda producers have confirmed that they don't use bone char as a filter. Sucralose is tested on animals.

kid-, pig- or calf-skin tanned
solid fat prepared from the kidneys of cattle and sheep
a sweet crystallizable material that consists wholly or essentially of . It is obtained commercially from sugarcane or sugar beet. Beet sugar is vegan, but some cane sugars are processed through .
a toxic colorless gas formed primarily by the combustion of sulfur-containing material, like fossil fuels.

ingredient is produced by chemical synthesis, which means that parts or elements are combined to form a whole. Unlike products, synthetic products are made from ingredients that do not occur (independently) in nature.

Sodium hydroxide is also used in the production of viscose rayon

Many detergent products, particularly liquids, contain other synthetic anionic surfactants such as alkyl sulfates, esters of linear alcohols (C10-C18) and sulfuric acid. The alkyl sulfates are also used in personal care products such as toothpaste and are manufactured by treating the alcohol with sulfur trioxide. The product is then neutralised with aqueous sodium hydroxide solution to form a sodium alkyl sulfate: