Propylene glycol ethers

Natural Products. Many natural products, eg, sugars, starches, and cellulose, contain hydroxyl groups that react with propylene oxide. Base-cataly2ed reactions yield propylene glycol monoethers and poly(propylene glycol) ethers (61—64). Reaction with fatty acids results ia a mixture of mono- and diesters (65). Cellulose fibers, eg, cotton (qv), have been treated with propylene oxide (66—68). 

Largest peak in the mass spectrum of propylene glycol ethers CH3OCH2CH2— (diethylene glycol dimethyl ether)... 

Such a dispersant formulation for dispersing oil contains a mixture of a sorbitan monoester of an aliphatic monocarboxylic acid, a polyoxyethylene adduct of a sorbitant monoester of an aliphatic monocarboxylic acid, a water-dispersible salt of a dialkyl sulfosuccinate, a polyoxyethylene adduct of a sorbitan triester or a sorbital hexaester of an aliphatic monocarboxylic acid, and a propylene glycol ether as solvent [311,312]. 

Propylene oxide (PO) is an important intermediate in the manufacture of a wide range of valuable products propylene glycol, ethers, isopropanolamines, and various propoxylated products for polyurethanes (1). The current processes for the large scale synthesis of PO include (i) the chlorohydrin process and (ii) the peroxide process (1, 2). 

Toxicology. Dipropylene glycol methyl ether (DPGME) at very high concentrations causes narcosis in animals, and it is expected that severe exposure will produce the same effect in humans. Because the propylene glycol ethers are metabolized differently from the ethylene glycol ethers, they are not associated with potent teratogenic, spermatotoxic, or hematopoietic effects. ... 

Uses. Primarily as a chemical intermediate to produce polyether polyols, propylene glycols and propylene glycol ethers fumigant preservative... 

Staples, C.A. and Davis, J.W. (2002) An examination of the physical properties, fate, ecotoxicity and potential environmental risks for a series of propylene glycol ethers, Chemosphere 49 (1), 61-73. 

Benecel MHPC E464 hydroxypropyl methylcellulose HPMC Methocel methylcellulose propylene glycol ether methyl hydroxypropylcellulose Metolose Tylopur. 

Synonyms This is a large and diverse group of compounds that can be divided into two general classes the ethylene glycol ethers and the propylene glycol ethers... 

Table 2 Names, molecular formula. structures, and exposure standards for typical propylene glycol ethers ...

Propylene oxide is widely used in the chemical industry as an intermediate in the production of a broad spectrum of materials, such as polyether polyols, propylene glycol, and propylene glycol ethers. These products are further used in the manufacture of polyurethane, lubricants, and detergents. Propylene oxide is used for the fumigation of dried fruit and various other foodstuffs. Propylene oxide is also used for embedding tissues for electron microscopy. 

Propylene oxide (PO) is an important chemical intermediate, which is mainly used in the manufacture of polyols, propylene glycols, and propylene glycol ethers [1]. The world annual production capacity of PO is about 7 million metric tons [2]. PO is mainly produced commercially by either the chlorohydrin (about 43%) or organic hydroperoxide processes. The chlorohydrin route produces large amounts of salt by-product, and new plants have used the hydroperoxide processes [3]. 

Polypropylene glycols -Propylene glycol ethers Isopropanolamines-----... 

Fenoprop (10) is a white crystalline compound, it is marketed in the form of its propylene glycol ether ester. 

Arcosolv . [Aico] Propylene glycol ether ot ether acetate solvents for coatings, cleaners, inks, agiic. ixods., electmiic, cosmetics, emical intermediate applies. 

Crystals from water, mp 160. Practically insol in water. Sol in ethanol, isopropanol, propylene glycol, ether, benzene, toluene. Hydrolyzed by alkali. 

Poly-Solv . [Olin] Ethyloie and propylene glycol ether solvents to brt fluids, hard-surf, cleaners, leather dyeing, paints, coatings, printing inks, textile vat dyeing and printing, adhesives, antifreeze, floor waxes/polishes, insect repellents solubilizer to dyes plasticize . 

TSCA 40CFR712.30.el 1 Propylene glycol ethers and esters T30-el 1... 

Despite the fact that ethyl Cellosolve is a product that has been in widespread use for many years, it is only recently that its property of causing aplastic anaemia has been discovered. The propylene glycol ethers, which do not have a surular health risk, provide a range of solvents with generally similar properties. 

The propylene glycol ethers do not show the same long-term carcinogenic properties that the ethyl ones do and therefore they can be recovered with less protection than absorption of ethyl ethers through the skin and lungs demand. 

Synonyms Carbohydrate gum Cellulose hydroxypropyl methyl ether Cellulose 2-hydroxypropyl methyl ether HPMC Hypromellose Methyl hydroxypropyl cellulose MHPC Definition Propylene glycol ether of methyl cellulose Properties Wh. gran, powd. sol. in most polar soivs., cold water swells in water to produce a clear to opalescent vise, colloidal sol n. insol. in hot water and in anhyd. alcohol, ether, chloroform nonionic Toxicoiogy LD50 (IP, rat) 5200 mg/kg mildly toxic by IP route TSCA listed... 

Table 11.1 ARCOSOLV Ethylene and Propylene Glycol Ethers (7o) Physical Properties...

Table 11.8 Olin Chemicals Poly-Soiv Propylene Glycol Ethers (66)...

---