Glycol

\( \newcommand\) • • • Learning Objectives • To describe the structure and uses of some common polyhydric alcohols. Alcohols with two OH groups on adjacent carbon atoms are commonly known as glycols. The most important of these is 1,2-ethanediol (the common name is ethylene glycol), a sweet, colorless, somewhat viscous liquid. Another common glycol, 1,2-propanediol, is commonly called propylene glycol. Its physical properties are quite similar to those of ethylene glycol. Commonly called glycerol or glycerin, 1,2,3-propanetriol is the most important trihydroxy alcohol. Like the two glycols, it is a sweet, syrupy liquid. Glycerol is a product of the hydrolysis of fats and oils. Ethylene glycol is the main ingredient in many antifreeze mixtures for automobile radiators. The two OH groups lead to extensive intermolecular hydrogen bonding. This results in a high boiling point—198°C; thus ethylene glycol does not boil away when it is used as an antifreeze. It is also completely miscible with water. A solution of 60% ethylene glycol in water freezes at −49°C (−56°F) and thus protects an automobile radiator down to that temperature. Ethylene glycol is also used in the manufacture of polyester fiber and magnetic film used in tapes for recorders and computers. To Your Health: Glycols and Human Health Ethylene glycol is quite toxic. Because it is sweet, pets often lap up spills of leaked antifreeze from a garage floor or driveway. Sometimes people, especially children, drink it. As ...

Hiraman / E+ / Getty Images What Is Propylene Glycol? Propylene glycol is an alcohol that absorbs water and mixes completely with many solvents. While you might see propylene glycol described as an organic compound, this does not mean it’s naturally occurring. Instead, the term organic compound refers to the fact that it contains carbon. • As an anticaking agent, helping to prevent lumps from forming in food • As a solvent in food flavorings, helping to dissolve and mix ingredients in them • As a dough strengthener • To improve flavors in food • As a preservative, its antimicrobial properties help to kill or prevent the growth of microorganisms like bacteria and mold • As a food thickener • To help retain moisture in food Cosmetics Propylene glycol is a common ingredient in cosmetic, personal, and skin care products. It is in anywhere from 26.4% to 37.8% of registered personal care products. Propylene glycol is a versatile substance that carries out many functions in the product formulations in which it is included. Some of these functions are: • Humectant: Humectants are included in cosmetic and skin care products for their moisturizing abilities. Propylene glycol works as a humectant by attracting moisture to the skin and consequently hydrating and moisturizing it. • Solvent: Propylene glycol is used to dissolve substances in a product formulation to get them to mixand work together properly. It also acts as the carrier for active ingredients. • Emollient: Emollients are...

Recent Examples on the Web Last week, Indian authorities arrested three Marion employees after tests in a government laboratory found that 22 of 36 samples had unacceptable amounts of diethylene glycol or ethylene glycol, leading to a suspension of the company’s production. — Diego Lasarte, Quartz, 10 Mar. 2023 Diethylene glycol and ethylene glycol are industrial versions of the glycerine found in propylene glycol, which is a necessary ingredient in making cough syrup. — Diego Lasarte, Quartz, 10 Mar. 2023 Ethylene glycol is commonly found in anti-freeze used in motor vehicles. — Swati Gupta, CNN, 30 Dec. 2022 Polyethylene glycol is among a growing list of treatments (including drugs, stem cells and gene therapies) showing promise in pre-clinical studies, but the path to real-world applications is notoriously tricky. — Andrew Jackson, Discover Magazine, 2 Feb. 2016 This operates at 800 volts, supports fast-charging, and is actively cooled using a water- glycol mix. — Mike Duff, Car and Driver, 7 Dec. 2022 Propylene glycol, disodium EDTA, phenoxyethanol, and ethylhexylglycerin are all forms of preservatives to extend the life and efficacy of the gloss. — Madison Yauger, Peoplemag, 7 Nov. 2022 Ethylene glycol is used in radiators, because it’s not only an antifreeze, but also a coolant. — Ray Magliozzi, San Diego Union-Tribune, 9 Oct. 2022 Ethylene glycol is not a typical part of normal toxicology screenings and requires specific testing to detect, which is why it was missed...

See also: In a vicinal diol, the two hydroxyl groups occupy 2) 2−OH, a common ingredient of 2−CH(OH)−CH 3, used in the food and medicine industry, as well as a relatively non-poisonous antifreeze product. On commercial scales, the main route to vicinal diols is the hydrolysis of For academic research and pharmaceutical areas, vicinal diols are often produced from the Other routes to vic-diols are the hydrogenation of 1,3-Diols [ ] 1,3-Diols are often prepared industrially by RC(O)CH 3 + CH 2O → RC(O)CH 2CH 2OH RC(O)CH 2CH 2OH + H 2 → RCH(OH)CH 2CH 2OH 2,2-Disubstituted propane-1,3-diols are prepared in this way. Examples include 2-methyl-2-propyl-1,3-propanediol and 1,3-Diols can be prepared by hydration of α,β-unsaturated ketones and aldehydes. The resulting keto-alcohol is hydrogenated. Another route involves the More specialized routes to 1,3-diols involves the reaction between an 1,3-Diols are described as syn or anti depending on the relative stereochemistries of the carbon atoms bearing the hydroxyl functional groups. syn and anti 1,3-diols. 1,4-, 1,5-, and longer diols [ ] Diols where the hydroxyl groups are separated by several carbon centers are generally prepared by hydrogenation of diesters of the corresponding (CH 2) n(CO 2R) 2 + 4 H 2 → (CH 2) n(CH 2OH) 2 + 2 H 2O + 2 ROH Reactions [ ] From the industrial perspective, the dominant reactions of the diols is in the production of General diols [ ] Diols react as Diols such as A diol can be converted to cyclic eth...

• (212) 518-6475 • Schedule Consultation • Cleaning & Water Treatment • Assessment • Glycol Systems • Filtration Solutions • HVAC Systems • Legionella Compliance • Remote HVAC Monitoring • Specialty Pipes • Sustainable Water Treatment • Legionella Compliance • Service • Prevention • Remediation • Risk Assessments • Sampling • Summons & Violations • Testing • Water Management • Industry • Educational Facilities • Commercial Buildings • Healthcare Facilities • Residential Buildings • Retirement Facilities • Heavy Industrial Industry • Light Industrial Industry • System • Cooling Towers • Domestic Hot Water • Fountains, Water Features & Pools • Cooling Tower Services • Cleaning • Compliance • Maintenance • Water Treatment • Consulting & Estimating • Mechanical Estimating • Specification Consulting • Water Treatment Consulting • Resources • Forms & Brochures • Multimedia • SDS & Product Bulletins • Training & Education • Water Change Calculator • About • Blog • Careers • Clients • FAQs • Team • Search this website What is glycol? If you are in charge of managing a cooling or water system, you may have heard of glycol as one possible component. Glycol is used in some water systems to keep the temperature low and consistent. However, if you are considering taking advantage of the benefits of a Definition of Glycol Glycol is an The Two Types of Glycol Glycol is an overarching term that encompasses a number of separate chemical formulae. This is why understanding the type that you...

\( \newcommand\) • • • Learning Objectives • To describe the structure and uses of some common polyhydric alcohols. Alcohols with two OH groups on adjacent carbon atoms are commonly known as glycols. The most important of these is 1,2-ethanediol (the common name is ethylene glycol), a sweet, colorless, somewhat viscous liquid. Another common glycol, 1,2-propanediol, is commonly called propylene glycol. Its physical properties are quite similar to those of ethylene glycol. Commonly called glycerol or glycerin, 1,2,3-propanetriol is the most important trihydroxy alcohol. Like the two glycols, it is a sweet, syrupy liquid. Glycerol is a product of the hydrolysis of fats and oils. Ethylene glycol is the main ingredient in many antifreeze mixtures for automobile radiators. The two OH groups lead to extensive intermolecular hydrogen bonding. This results in a high boiling point—198°C; thus ethylene glycol does not boil away when it is used as an antifreeze. It is also completely miscible with water. A solution of 60% ethylene glycol in water freezes at −49°C (−56°F) and thus protects an automobile radiator down to that temperature. Ethylene glycol is also used in the manufacture of polyester fiber and magnetic film used in tapes for recorders and computers. To Your Health: Glycols and Human Health Ethylene glycol is quite toxic. Because it is sweet, pets often lap up spills of leaked antifreeze from a garage floor or driveway. Sometimes people, especially children, drink it. As ...

Recent Examples on the Web Last week, Indian authorities arrested three Marion employees after tests in a government laboratory found that 22 of 36 samples had unacceptable amounts of diethylene glycol or ethylene glycol, leading to a suspension of the company’s production. — Diego Lasarte, Quartz, 10 Mar. 2023 Diethylene glycol and ethylene glycol are industrial versions of the glycerine found in propylene glycol, which is a necessary ingredient in making cough syrup. — Diego Lasarte, Quartz, 10 Mar. 2023 Ethylene glycol is commonly found in anti-freeze used in motor vehicles. — Swati Gupta, CNN, 30 Dec. 2022 Polyethylene glycol is among a growing list of treatments (including drugs, stem cells and gene therapies) showing promise in pre-clinical studies, but the path to real-world applications is notoriously tricky. — Andrew Jackson, Discover Magazine, 2 Feb. 2016 This operates at 800 volts, supports fast-charging, and is actively cooled using a water- glycol mix. — Mike Duff, Car and Driver, 7 Dec. 2022 Propylene glycol, disodium EDTA, phenoxyethanol, and ethylhexylglycerin are all forms of preservatives to extend the life and efficacy of the gloss. — Madison Yauger, Peoplemag, 7 Nov. 2022 Ethylene glycol is used in radiators, because it’s not only an antifreeze, but also a coolant. — Ray Magliozzi, San Diego Union-Tribune, 9 Oct. 2022 Ethylene glycol is not a typical part of normal toxicology screenings and requires specific testing to detect, which is why it was missed...

Hiraman / E+ / Getty Images What Is Propylene Glycol? Propylene glycol is an alcohol that absorbs water and mixes completely with many solvents. While you might see propylene glycol described as an organic compound, this does not mean it’s naturally occurring. Instead, the term organic compound refers to the fact that it contains carbon. • As an anticaking agent, helping to prevent lumps from forming in food • As a solvent in food flavorings, helping to dissolve and mix ingredients in them • As a dough strengthener • To improve flavors in food • As a preservative, its antimicrobial properties help to kill or prevent the growth of microorganisms like bacteria and mold • As a food thickener • To help retain moisture in food Cosmetics Propylene glycol is a common ingredient in cosmetic, personal, and skin care products. It is in anywhere from 26.4% to 37.8% of registered personal care products. Propylene glycol is a versatile substance that carries out many functions in the product formulations in which it is included. Some of these functions are: • Humectant: Humectants are included in cosmetic and skin care products for their moisturizing abilities. Propylene glycol works as a humectant by attracting moisture to the skin and consequently hydrating and moisturizing it. • Solvent: Propylene glycol is used to dissolve substances in a product formulation to get them to mixand work together properly. It also acts as the carrier for active ingredients. • Emollient: Emollients are...

• (212) 518-6475 • Schedule Consultation • Cleaning & Water Treatment • Assessment • Glycol Systems • Filtration Solutions • HVAC Systems • Legionella Compliance • Remote HVAC Monitoring • Specialty Pipes • Sustainable Water Treatment • Legionella Compliance • Service • Prevention • Remediation • Risk Assessments • Sampling • Summons & Violations • Testing • Water Management • Industry • Educational Facilities • Commercial Buildings • Healthcare Facilities • Residential Buildings • Retirement Facilities • Heavy Industrial Industry • Light Industrial Industry • System • Cooling Towers • Domestic Hot Water • Fountains, Water Features & Pools • Cooling Tower Services • Cleaning • Compliance • Maintenance • Water Treatment • Consulting & Estimating • Mechanical Estimating • Specification Consulting • Water Treatment Consulting • Resources • Forms & Brochures • Multimedia • SDS & Product Bulletins • Training & Education • Water Change Calculator • About • Blog • Careers • Clients • FAQs • Team • Search this website What is glycol? If you are in charge of managing a cooling or water system, you may have heard of glycol as one possible component. Glycol is used in some water systems to keep the temperature low and consistent. However, if you are considering taking advantage of the benefits of a Definition of Glycol Glycol is an The Two Types of Glycol Glycol is an overarching term that encompasses a number of separate chemical formulae. This is why understanding the type that you...

See also: In a vicinal diol, the two hydroxyl groups occupy 2) 2−OH, a common ingredient of 2−CH(OH)−CH 3, used in the food and medicine industry, as well as a relatively non-poisonous antifreeze product. On commercial scales, the main route to vicinal diols is the hydrolysis of For academic research and pharmaceutical areas, vicinal diols are often produced from the Other routes to vic-diols are the hydrogenation of 1,3-Diols [ ] 1,3-Diols are often prepared industrially by RC(O)CH 3 + CH 2O → RC(O)CH 2CH 2OH RC(O)CH 2CH 2OH + H 2 → RCH(OH)CH 2CH 2OH 2,2-Disubstituted propane-1,3-diols are prepared in this way. Examples include 2-methyl-2-propyl-1,3-propanediol and 1,3-Diols can be prepared by hydration of α,β-unsaturated ketones and aldehydes. The resulting keto-alcohol is hydrogenated. Another route involves the More specialized routes to 1,3-diols involves the reaction between an 1,3-Diols are described as syn or anti depending on the relative stereochemistries of the carbon atoms bearing the hydroxyl functional groups. syn and anti 1,3-diols. 1,4-, 1,5-, and longer diols [ ] Diols where the hydroxyl groups are separated by several carbon centers are generally prepared by hydrogenation of diesters of the corresponding (CH 2) n(CO 2R) 2 + 4 H 2 → (CH 2) n(CH 2OH) 2 + 2 H 2O + 2 ROH Reactions [ ] From the industrial perspective, the dominant reactions of the diols is in the production of General diols [ ] Diols react as Diols such as A diol can be converted to cyclic eth...