A spectrophotometer, also known as a spectrometer (spectrometer), is a scientific instrument that breaks down a complex composition of light into spectral lines.
Sebacic acid is widely used in the preparation of sebacic acid esters, such as dibutyl sebacate, dioctyl sebacate, diisooctyl sebacate. These esters can be used as plasticizers for plastics and cold-resistant rubber, as well as for polyamide, polyurethane, alkyd resin, synthetic lubricating oil, lubricating oil additives, spices, coatings, cosmetics, etc.
Guar gum is a macromolecular natural hydrophilic colloid, which belongs to natural galactomannan, one of the quality improvers and a natural thickening agent. The appearance is from white to yellowish free-flowing powder, can dissolve in cold or hot water, and form a gelatinous substance after water, to achieve rapid thickening effect. It is mainly divided into food grade and industrial grade (those used in oil fields belong to industrial grade).