Aldehydes flammability

ACETALDEHYDE Acetic Aldehyde, Ethanal, Ethyl Aldehyde Flammable Liquid, I 2 4 2 ... 

PROPIONALDEHYDE Propyl aldehyde, Propaldehyde, Propanal, Propionic aldehyde Flammable Liquid, II 2 3 1 ... 

Usually, organoboranes are sensitive to oxygen. Simple trialkylboranes are spontaneously flammable in contact with air. Nevertheless, under carefully controlled conditions the reaction of organoboranes with oxygen can be used for the preparation of alcohols or alkyl hydroperoxides (228,229). Aldehydes are produced by oxidation of primary alkylboranes with pyridinium chi orochrom ate (188). Chromic acid at pH < 3 transforms secondary alkyl and cycloalkylboranes into ketones pyridinium chi orochrom ate can also be used (230,231). A convenient procedure for the direct conversion of terminal alkenes into carboxyUc acids employs hydroboration with dibromoborane—dimethyl sulfide and oxidation of the intermediate alkyldibromoborane with chromium trioxide in 90% aqueous acetic acid (232,233). 

Sodium (metal). Used as a fine wire or as chips, for more completely drying ethers, saturated hydrocarbons and aromatic hydrocarbons which have been partially dried (for example with calcium chloride or magnesium sulfate). Unsuitable for acids, alcohols, alkyl halides, aldehydes, ketones, amines and esters. Reacts violently if water is present and can cause a fire with highly flammable liquids. 

Fire Hazards - Flash Point (deg. F) 285 OC Flammable Limits in Air (%) 0.8 - 5.0 Fire Extinguishing AgerUs Alcohol foam, dry chemical, or carbon dioxide Fire Extinguishing Agents Not To Be Used Water may be ineffective Special Hazards of Combustion Products Acrid fumes of acids and aldehydes may form in fires Behavior in Fire No data Ignition Temperature No data Electrical... 

ACROLEIN Acraldehyde, Acrylic Aldehyde, Allyl Aldehyde, Ethylene Aidehide, 2-Propenal, Acrylaldehyde Flammable Liquid, III 3 3 2 ... 

CROTONALDEHY DE beta-Methylacrolein, Crotenaldehyde, Crotonic Aldehyde, trans-2-Butenal Flammable Liquid, II 3 3 2... 

The simplest of the aldehydes is formaldehyde, whose molecular formula is HCHO. The second hydrocarbon backbone of the ketone is replaced by a hydrogen atom. Formaldehyde is a gas that is extremely soluble in water it is often sold commercially as a 50 percent solution of the gas in water. The gas itself is flammable, has an ignition temperature of 806°F and a strong, pungent odor, and is toxic by inhalation. Inhalation at low concentrations over long periods of time has produced illness in many people. Beside its use as an embalming fluid, formaldehyde is used in the production of many plastics and in the production of numerous other chemicals. 

Formaldehyde is a colorless, flammable gas with a distinctive pungent odor. It is the simplest aldehyde, which is a class of organic compounds with the carbonyl group bonded to at least one hydrogen atom. Formaldehyde was described by August Wilhelm von Hoffmann (1818—1892) in 1867 after the Russian Aleksandr Butlerov (1828—1886) had inadvertently synthesized it in 1857. Formaldehyde readily dissolves in water to produce a solution called formalin, which is commonly marketed as a 37% solution. 

The biological oxygen demand (BOD) in aqueous streams for both butanals is 1.62 wt/wt for five days (42). The NFPA Hazard classification (42) for both aldehydes are health (blue) 2 flammability (red) 3 and reactivity (yellow) 0. The flammability characteristics of the butanals are given in Table 7. The flash points for the butanals are well below room temperature. Thus, precautions must be taken to avoid heat, sparks, or open flame. ... 

Propenaldehyde. Aldehyde group. Typically available as a 92% active, liquid. It is flammable, volatile, lachrymatory, and a strong irritant. Acrolein is a protein and enzyme poison. It is stabilized against polymerization by the addition of hydroquinone (oxidation results in polymerization, rendering acrolein inactive as a microbiocide). Although only small dose levels are required (1.5 to 3.0 ppm) to achieve threshold toxicity, rapid microbial resistance can occur. This product is seldom used today as the effort is often not worth the gain. 

Synonyms ethanal, acetic aldehyde Formula CH3CHO MW 44.05 CAS [75-07-0] used in the production of acetic acid, acetic anhydride, and many synthetic derivatives found in water stored in plastic containers colorless mobil liquid fruity odor when diluted boils at 20.8°C solidifies at -121°C highly volatile vapor pressure 740 torr at 20°C density 0.78 g/mL at 20°C soluble in water, alcohol, acetone, ether, and benzene highly flammable... 

Synonyms methanal, methylene oxide, oxymethane Formula HCHO MW 30.03 CAS[50-00-0] constitutes about 50% of all aldehydes present in air released in trace quantities from pressed wood products, burning wood, and synthetic polymers and automobiles colorless gas at ambient conditions pungent suffocating odor liquefies at -19.5°C solidifies at -92°C density 1.07 (air = 1) very soluble in water, soluble in organic solvents readily polymerizes flammable, toxic, and carcinogenic (Patnaik, 1992). 

Some organics, acetic anhydride, metals, alcohols, wood and its derivatives (see the other tables in this chapter dealing with this compound) Aldehydes, alcohols, unsaturated hydrocarbons Flammable liquids, metals, aldehydes, alcohols, impact, hydrocarbons (unsaturated)... 

Acetaldehyde FEMA No. 2003 Acetic Aldehyde Ethanal 44.05/C2H4O/ CH3CHO flammable, colorless liq/ pungent, ethereal m—ale, org solvents, water/ 21° ... 

Synonyms and trade names acetic aldehyde, aldehyde, ethanol, ethylaldehyde Use and exposure Acetaldehyde is a highly flammable, volatile, colorless liquid with a characteristic and pungent odor. It is miscible in water. Exposure to acetaldehyde occurs during the production of acetic acid and various other industrial chemical substances—for instance, manufacture of drugs, dyes, explosives, disinfectants, phenolic and urea resins, rubber accelerators, and varnish. - - ... 

---