مرجع مواد شیمیایی ایران
اطلاعات عمومی پروپیلن گلیکول
  • نام شیمیایی

    • پروپیلن گلیکول

    • Propylene glycol

  • مترادف ها
    •  مونوپروپیلن گلیکول

    • Propane-1,2-diol ; α-Propylene glycol ; 1,2-Propanediol ; 1,2-Dihydroxypropane ; Methyl ethyl glycol (MEG) ; Methylethylene glycol

  • CAS
    57-55-6
  • فرمول مولکولی
    C3H8O2
  • جرم مولکولی
    76/09
  • EINECS
    200-338-0
  • ICB Number
    ICB 3180
پروپیلن گلیکول
  • شکل و حالت فیزیکی
    مایع شفاف ویسکوز
  • نقطه ذوب
    -59 °C
  • نقطه جوش
    188 °C
  • دانسیته
    1/036 g/cm3
  • فشار بخار
    0/08 mm Hg ( 20 °C)
  • دانسیته بخار
    2/62 (vs air)
  • ضریب شکست (n20/D­­)
    1/432
  • نقطه اشتعال
    225 °F
  • دمای نگهداری
    دمای اتاق
  • حلالیت در آب
    محلول در آب
  • ویسکوزیته
    0/042 Pa.s
  • شماره CAS
    57-55-6
  • شماره ثبت تجاری (RBN)
    1340498
  • شماره مرک (Merck)
    14,7855
  • NIST Chemistry Reference
  • EPA Substance Registry System
  • Safety Statements
  • RTECS
    TY2000000
  • مراجع MSDS
  • ارائه دهنده
    زبان
  • انگلیسی
  • انگلیسی
  • Chemical Properties
    • It is a colorless, stable and viscous hydroscopic liquid, and is almost odorless and tasteless. It is miscible with water, ethanol and various organic solvents.

  • General Description
    • Thick odorless colorless liquid. Mixes with water.

  • Air & Water Reactions
    • Water soluble.

  • Reactivity Profile

    1,2-Propanediol is hygroscopic. 1,2-Propanediol is sensitive to excessive heat (tends to oxidize at high temperatures). 1,2-Propanediol can react with oxidizing materials. 1,2-Propanediol is incompatible with acid chlorides, acid anhydrides, chloroformates, and reducing agents. 1,2-Propanediol dissolves many essential oils. A mixture of 1,2-Propanediol with hydrofluoric acid and silver nitrate was put in a glass bottle which burst 30 minutes later.

  • Synthesis
    • It can be obtained by hydrolysis of Propylene oxide: CH3CHCH2+H2O[H+]→CH3CH(OH)CH2OH Direct hydration Propylene oxide and water are fed in a molar ratio of 1: 15, and react at 150-2000 °C, a pressure of 1.2-1.4 MPa for 30 minutes to obtain 16% aqueous solution of propylene glycol, which is subjected to evaporation to obtain the finished product. Catalyzed hydrolysis The reaction is performed under catalyzation of sulfuric acid or hydrochloric acid. 0.5% to 1.0% dilute sulfuric acid is added into 10% to 15% aqueous solution of propylene oxide, the mixture is hydrolyzed at 50 to 70 °C; the hydrolysate is neutralized and concentrated under reduced pressure, and refined to obtain the finished products. The preparation method is a method in which propylene oxide is hydrolyzed to propylene glycol, and which can be carried out in the liquid phase. There are catalytic and non-catalytic processes in industry. Catalytic method is a method in which hydrolysis is carried out in the presence of 0.5% to 1% sulfuric acid at 50 to 70 °C. Non-catalytic process is carried out under high temperature and pressure (150 to 300℃, 980 to 2940kPa), and is used for production in domestic.

  • Usage
    • 1. It is used as a resin, a plasticizer, a surfactant, and materials for emulsifier and demulsifier. It is also used as antifreeze and heat carrier. 2. It is used as gas chromatography stationary phase, solvents, antifreeze, a plasticizer and a dehydrating agent. 3. A carrier solvent; wetting agents; moisturizing agents; anti-caking agents; antioxidants; texturizing agents; surfactant; stabilizer; a thickener; dough modifiers; emulsifiers; flavoring agents; excipient; processing aids.GB2760-96 lists it as food processing aids. It is mainly used as solvents for a variety of flavors, colors and preservatives, and as extraction solvents for vanilla beans, roasted coffee grains and natural spices. It is used as moisturizing agents and softeners for candy, bread, packaged meats and cheese. It is also used as mildew agents for noodles and sandwiches class. Addition of 0.006% in soymilk enables the flavor not to change upon heating and produces white glossy packaging tofu, which undergoes volume expansion when fried. 4. Propylene glycol is an intermediate for fungicide difenoconazole. 5. It is used a solvent. Preservatives, colorings, antioxidants and other poorly water-soluble food additives can be dissolved therein, which is then added into food; it is strongly hygroscopic and has food moisturizing and anti-freeze effect. China stipulates its use for pastry, and the maximum usage is 3.0g / kg. 6. Propylene glycol is an important raw material for unsaturated polyester, epoxy resin, and polyurethane resin. The use amount in this area accounts for about 45% of the total consumption of propylene glycol. Such unsaturated polyester is used extensively for reinforced plastics and surface coatings. Propylene glycol is excellent in viscosity and hygroscopicity and is non-toxic, and thus is widely used as hygroscopic agent, antifreeze, lubricants and solvents in the food, pharmaceutical and cosmetic industry. In the food industry, propylene glycol reacts with fatty acid to give propylene ester of fatty acids, and is mainly used as food emulsifier; Propylene glycol is a good solvent for flavorings and pigments. Propylene glycol is commonly used as solvents, softeners and excipients, etc. in the pharmaceutical industry for the manufacture of various types of ointments and salves. Propylene glycol is also used as a solvent and a softener for cosmetic since it has good mutual solubility with various spices. Propylene glycol is also used as tobacco moisturizing agents, antifungal agents, food processing equipment lubricants and solvents for food marking ink. Aqueous solution of propylene glycol is an effective anti-freeze agent. 7. It is used as a drug carrier, and agents for drug particles. It can be used as humectants, softeners, solvents and the like in cosmetics. It can be used as tobacco flavor, tobacco moisturizing agents, preservatives and the like in the tobacco industry. It can be used as flavor, food coloring solvents, food packaging softeners, food release agent and the like in food industry. It can also be used for the production of unsaturated polyester resins, and is also raw materials for plasticizers, dehydrating agents, surfactants, curing agents and binders. It can also be used in paints, pesticides, coatings and other industries. 8. It is used in aviation de-icing fluid, refrigerant and antifreeze, food and spices, fragrances, cosmetics and personal care products, heat transfer fluids, hydraulic and brake fluids, paints and coatings, pet food/animal feeding stuffs, medicines, polyurethane, unsaturated polyester resin and the like.

  • Health Hazard

    Liquid may irritate eyes.

  • Fire Hazard

    1,2-Propanediol is combustible.

  • Preparation products

    Methyl acrylate-->Pyruvic acid-->PAINT-->Phytic acid-->Adhesive-->4-Hydroxystyrene-->Unsaturated polyester resin-->1,3-Dibromopropane-->Curcumin-->2,4,5-Trichlorophenol-->1,3-Dichloropropane-->3-Chloro-1,2-propanediol-->Glycidol-->LACCAIC ACID-->Propylene carbonate -->alpha-d-Glucopyranoside, beta-d-fructofuranosyl, octadecanoate -->MONASCUS RED-->Famciclovir-->Meprobamate-->2-OXAZOLIDINONE, 5-(HYDROXYMETHYL)-3-(3-METHYLPHENYL)--->5,8-Dihydroxy-2-[(1R)-1-hydroxy-4-methyl-pent-3-enyl]naphthalene-1,4-dione-->Poly(propylene glycol)-->4-Hydroxy-2,5-dimethyl-3(2H)furanone-->PROPYLENE GLYCOL MONOSTEARATE (CONTAINS CA. 35% MONOPALMITATE)-->1,1'-Oxydi-2-propanol-->Diprophylline-->2,4-DIHYDROXY-3,3-DIMETHYLBUTANOIC ACID-->demulsifier PE series-->Maiz moraelo colour

  • Raw materials

    Methanol-->Chlorine-->Propylene oxide-->1-Chloro-2-propanol-->Propylene carbonate