Dimethyl classification

CAS 26850-24-8 EINECS/ELINCS 248-052-5 Synonyms 1,3-Bis (2-hydroxyethyl)-5,5-dimethyl-2,4-imidazolidinedione Diethylol dimethyl hydantoin Di-(2-hydroxyethyl)-5,5-dimethyl hydantoin 2,4-lmidazolidinedione, 1,3-bis (2-hydroxyethyl)-5,5-dimethyl-Classification Organic compd. 

Synonyms Citral diethyl acetate 1,1-Diethoxy-3,7-dimethyl-2,6-octadiene 3,7-Dimethyl-2,6-octadienal diethyl acetal 2,6-Octadienal, 3,7-dimethyl-, diethyl acetal 2,6-Octadiene, 1,1-diethoxy-3,7-dimethyl-Classification Nonaromatic acetal Empirical C14H26O2... 

Dimethyl imidazolidinone CAS 80-73-9 EINECS/ELINCS 201-304-8 Synonyms N,N -Dimethylethyleneurea 1,3-Dimethyl-2-imidazolidinone 1,3-Dimethylimidazolidin-2-one DMI 2-Imidazolidinone, 1,3-dimethyl-Classification Heterocyclic organic compd. Empirical C5H10N2O... 

Dimethylnaphthalene CAS 581-42-0 EINECS/ELINCS 209-464-0 Synonyms 2,6-DMN Naphthalene, 2,6-dimethyl-Classification Aromatic hydrocarbon Empirical C12H12 Formula CioH6(CH3)2... 

CAS 77-71-4 EINECS/ELINCS 201-051-3 Synonyms Dimethylhydantoin 5,5-Dimethyl hydantoin 5,5-Dimethyl-2,4-imidazolidinedione DMH 2,4-Imidazolidinedione, 5,5-dimethyl-Classification Organic compd. 

Health and Safety Factors. Dimethyl malonate and diethyl malonate do not present any specific danger of health ha2ard if handled with the usual precautions. Nevertheless, inhalation and skin contact should be avoided. Dimethyl malonate has a LD q (oral, rats) of 4520 mg/kg and is classified as nonirritant (skin irritation, rabbits). Diethyl malonate has an LD q (oral, rats) greater than 5000 mg/kg and is also classified as nonirritant (skin irritation, rabbits). Transport classification for both esters is RID/ADR 3, IMDH-Code, lATA-ICAO not restricted. 

The physical properties of finish removers vary considerably due to the diverse uses and requirements of the removers. Finish removers can be grouped by the principal ingredient of the formula, method of appHcation, method of removal, chemical base, viscosity, or hazardous classification. Except for method of apphcation, a paint remover formulation usually has one aspect of each group, by which it can be used for one or more appHcations. A Hst of the most common organic solvents used in finish removers has been compiled (3). Many are mentioned throughout this article others include ethyl lactate [97-64-3] propylene carbonate [108-32-7] furfural alcohol [98-01-1/, dimethyl formamide [68-12-2] tetrahydrofuran [109-99-9] methyl amyl ketone [110-43-0] dipropylene glycol methyl ether [34590-94-8] and Exxate 600, a trade name of Exxon Chemicals. 

Existing and proposed methods of evaluating transportation hazards of organic peroxides exposed to impact, explosive shock or thermal singe stimuli were reviewed, and a hazard classification system proposed [1]. Commercial 2-butanone peroxide ( MEK peroxide ) as a 40% solution in dimethyl phthalate was previously... 

The polymerization starting from a dimer or an oligomer is also an effective method for the classification of polymerization as chain or stepwise reaction. For the copper-catalyzed polymerization, the poly(phenyleneoxide) was also and rather rapidly obtained from the dimer of dimethylphenol(2,6-dimethylphenyl 3,5-dimethyl-4-hydroxy-... 

As was the case for the alkyl hydroperoxides in reaction 4, the enthalpies of the oxy-gen/hydrocarbon double exchange reaction 8 for dialkyl peroxides are different depending on the classification of the carbon bonded to oxygen. For R = Me, Et and f-Bu, the liquid phase values are —4, 24.6 and 52.7 kJmoR, respectively, and the gas phase values are 0.1, 25.7 and 56.5 kJmoR, respectively. For the formal deoxygenation reaction 9, the enthalpies of reaction are virtually the same for dimethyl and diethyl peroxide in the gas phase, —58.5 0.6 kJ moR. This value is the same as the enthalpy of reaction of diethyl peroxide in the liquid phase, —56.0 kJ moR (there is no directly determined liquid phase enthalpy of formation of dimethyl ether). Because of steric strain in the di-ferf-butyl ether, the enthalpy of reaction is much less negative, but still exothermic, —17.7 kJmol (Iq) and —19.6 kJmol (g). 

Type B. Those which contain no iso three-carbon group. Most of the hydrocarbons of this type, for which structures have been proved, contain two one-carbon groups in gem configuration and one or two additional isolated one-carbon or two-carbon groups, one of which is usually in meta position. These structures could be further divided into those that contain the gem-dimethyl configuration and those that do not, but their similar chemical reactivity warrants classification as a single group of compounds. Thus, Type B monocyclics may be considered as derivatives of dimethylcyclohexane, for which no trivial name has been well established. 

Although this classification of electron donors and acceptors often proves useful, these terms are only relative [14], under appropriate conditions, such as when the highest occupied molecular orbital is located between the orbitals of the potential donor and acceptor. Any molecule can exhibit both electron-donor and electron-acceptor properties [15]. Thus dimethyl-alloxazine, for example, acts as a donor to the strong acceptor TCNE (tetracyanoethylene) and as an acceptor to the strong donor pyrene [16]. This dual character applies particularly to iT-bonded molecules and is es-... 

DOT CLASSIFICATION 8 Label Corrosive SAFETY PROFILE Poison by intraperitoneal route. A dangerous storage hazard. It may explode in a sealed botde. Explosive reaction with dimethyl sulfoxide. Reacts vigorously with methyl formamide. When heated to decomposition it emits... 

DOT CLASSIFICATION 6.1 Label Poison SAFETY PROFILE Poison by ingestion, skin contact, subcutaneous, intravenous, and intraperitoneal routes. A severe skin and eye irritant. Questionable carcinogen with experimental neoplastigenic data by itself and with 7,12-dimethyl benz(a)anthracene. Combustible when exposed to heat or flame. Moderately explosive in the form of... 

DOT CLASSIFICATION 4.1 Label Flammable Solid, Poison SAFETY PROFILE Poison by inhalation, ingestion, skin contact, and intraperitoneal routes. Ignites in O2 at 100°C. Forms impact-sensitive explosive mixtures with ethers (e.g., dioxane) and halocarbons (e.g., carbon tetrachloride). Incompatible with dimethyl sulfoxide. When heated to decomposition it emits toxic fumes of boron oxides. See also BORON COMPOUNDS and BORANES. 

DOT CLASSIFICATION Forbidden SAFETY PROFILE A powerful oxidant which explodes above 140°C. Explosive reaction with boron. Hypergolic reaction with dimethyl hydrazine or other strong organic bases. Forms powerfully explosive mixtures with nitrogen containing organic compounds (e.g., 2-nitroaniline). Upon decomposition it emits toxic fumes of NOx. See also NITRO COMPOUNDS. 

DOT CLASSIFICATION 5.1 Label Oxidizer SAFETY PROFILE Moderately toxic by intraperitoneal route. Severe skin and eye irritant. A powerful oxidizer which has caused many explosions in industry. Potentially explosive reactions with alkenes (above 220°C), ammonia, arjl hydrazine + ether, dimethyl sulfoxide + heat, ethylene oxide, fluorobutane + water, organic materials, phosphorus, trimethyl phosphate. Reacts to form explosive products with ethanol (forms ethyl perchlorate), cellulose + dinitrogen tetraoxide + oxygen (forms cellulose nitrate). Avoid contact with mineral acids, butyl fluorides, hydrocarbons. A drying agent. When heated to decomposition it emits toxic fumes of MgO and Cr. See also MAGNESIUM COMPOUNDS and PERCHLORATES. 

DOT CLASSIFICATION 8 Label Corrosive SAFETY PROFILE Poison by ingestion, inhalation, and intravenous routes. Questionable carcinogen with experimental tumorigenic data. Experimental reproductive effects. A corrosive. A skin and severe eye irritant. An allergen. Has been reported as causing irritation of mucous membranes and heart rhythm disturbances in humans. Violent reaction with water -(above 30°C), acetone + water, methanol, methanol + sodium hydrogen carbonate, 2-ethoxyethanol, dimethyl formamide, 3-butanone + sodium hydroxide + water, allyl alcohol + sodium hydroxide + water (at 28°C). When heated to decomposition it emits toxic fumes of CL and NOx. See also CHLORIDES. 

This classification is illustrated in Scheme 317. Imidazole synthesis under this category is uncommon, as noted in CHEC(1984) and CHEC-II(1996). One example, in which secondary amino-AT-carbothioic acid (phenyl- -tolylimino-methyl)amides 1258 react with dimethyl acetylenedicarboxylate to form 4-aminoimidazoles 1259, has been reported. A reaction mechanism including the formation of a seven-membered cyclic intermediate followed by the extmsion of thioglyoxylic ester has been proposed (Scheme 318) <2004TL8945>. 

---